Merge branch 'master' into hotfix

Networking optimized

.gitignore

@@ -16,4 +16,4 @@
 /gh-pages
 
 #Private files
-/app/google-services.json
+**/google-services.json

.idea/codeStyles/Project.xml

@@ -1,5 +1,6 @@
 <component name="ProjectCodeStyleConfiguration">
   <code_scheme name="Project" version="173">
+    <option name="RIGHT_MARGIN" value="120" />
     <AndroidXmlCodeStyleSettings>
       <option name="ARRANGEMENT_SETTINGS_MIGRATED_TO_191" value="true" />
     </AndroidXmlCodeStyleSettings>

.idea/kotlinCodeInsightSettings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="KotlinCodeInsightWorkspaceSettings">
+    <option name="addUnambiguousImportsOnTheFly" value="true" />
+    <option name="optimizeImportsOnTheFly" value="true" />
+  </component>
+</project>

.idea/kotlinc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Kotlin2JvmCompilerArguments">
+    <option name="jvmTarget" value="1.8" />
+  </component>
+</project>

app/build.gradle

@@ -3,9 +3,15 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
 apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlinx-serialization'
-apply plugin: 'com.google.gms.google-services'
-apply plugin: 'io.fabric'
-apply plugin: 'com.google.firebase.firebase-perf'
+
+if (file("google-services.json").exists()) {
+    logger.lifecycle("Firebase Enabled")
+    apply plugin: 'com.google.gms.google-services'
+    apply plugin: 'io.fabric'
+    apply plugin: 'com.google.firebase.firebase-perf'
+} else {
+    logger.lifecycle("Firebase Disabled")
+}
 
 android {
     compileSdkVersion 29
@@ -13,8 +19,8 @@ android {
         applicationId "xyz.quaver.pupil"
         minSdkVersion 16
         targetSdkVersion 29
-        versionCode 31
-        versionName "4.2-beta2-hotfix2"
+        versionCode 41
+        versionName "4.5"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         multiDexEnabled true
         vectorDrawables.useSupportLibrary = true
@@ -25,7 +31,6 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
         buildTypes.each {
-            it.buildConfigField('boolean', 'PRERELEASE', 'true')
             it.buildConfigField('boolean', 'CENSOR', 'false')
         }
     }
@@ -36,6 +41,7 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    buildToolsVersion = '29.0.2'
 }
 
 dependencies {
@@ -44,34 +50,34 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.2.1'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.2.1'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.3'
     implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.14.0"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.preference:preference:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.gridlayout:gridlayout:1.0.0'
-    implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0'
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.1.0'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     implementation "androidx.biometric:biometric:1.0.1"
     implementation 'com.android.support:multidex:1.0.3'
     implementation "com.daimajia.swipelayout:library:1.2.0@aar"
-    implementation 'com.google.android.material:material:1.2.0-alpha03'
-    implementation 'com.google.firebase:firebase-core:17.2.1'
-    implementation 'com.google.firebase:firebase-perf:19.0.4'
+    implementation 'com.google.android.material:material:1.2.0-alpha04'
+    implementation 'com.google.firebase:firebase-core:17.2.2'
+    implementation 'com.google.firebase:firebase-perf:19.0.5'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
     implementation 'com.github.arimorty:floatingsearchview:2.1.1'
     implementation 'com.github.clans:fab:1.6.4'
-    implementation 'com.github.bumptech.glide:glide:4.9.0'
-    implementation ("com.github.bumptech.glide:recyclerview-integration:4.9.0") {
+    implementation 'com.github.bumptech.glide:glide:4.11.0'
+    implementation ("com.github.bumptech.glide:recyclerview-integration:4.10.0") {
         transitive = false
     }
+    implementation 'com.github.chrisbanes:PhotoView:2.3.0'
     implementation 'com.andrognito.patternlockview:patternlockview:1.0.0'
     implementation "ru.noties.markwon:core:${markwonVersion}"
-    kapt 'com.github.bumptech.glide:compiler:4.9.0'
-    testImplementation 'junit:junit:4.12'
+    kapt 'com.github.bumptech.glide:compiler:4.11.0'
+    testImplementation 'junit:junit:4.13'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test:rules:1.2.0'
     androidTestImplementation 'androidx.test:runner:1.2.0'

app/release/output.json

@@ -1 +1 @@
-[{"outputType":{"type":"APK"},"apkData":{"type":"MAIN","splits":[],"versionCode":31,"versionName":"4.2-beta2-hotfix2","enabled":true,"outputFile":"app-release.apk","fullName":"release","baseName":"release"},"path":"app-release.apk","properties":{}}]
+[{"outputType":{"type":"APK"},"apkData":{"type":"MAIN","splits":[],"versionCode":41,"versionName":"4.5","enabled":true,"outputFile":"app-release.apk","fullName":"release","baseName":"release"},"path":"app-release.apk","properties":{}}]

app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt

@@ -20,16 +20,12 @@
 
 package xyz.quaver.pupil
 
-import android.content.Intent
 import android.util.Log
+import androidx.core.content.ContextCompat
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.ActivityTestRule
-import kotlinx.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
-import kotlinx.serialization.json.JsonObject
-import org.junit.Assert.assertEquals
+import kotlinx.coroutines.runBlocking
 import org.junit.Test
 import org.junit.runner.RunWith
 import xyz.quaver.hiyobi.cookie
@@ -37,9 +33,8 @@ import xyz.quaver.hiyobi.createImgList
 import xyz.quaver.hiyobi.getReader
 import xyz.quaver.hiyobi.user_agent
 import xyz.quaver.pupil.ui.LockActivity
-import xyz.quaver.pupil.util.getDownloadDirectory
-import xyz.quaver.pupil.util.updateOldReaderGalleries
-import java.io.File
+import xyz.quaver.pupil.util.download.Cache
+import xyz.quaver.pupil.util.download.DownloadWorker
 import java.net.URL
 import javax.net.ssl.HttpsURLConnection
 
@@ -55,8 +50,6 @@ class ExampleInstrumentedTest {
     fun useAppContext() {
         // Context of the app under test.
         val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        Log.i("PUPILD", getDownloadDirectory(appContext).absolutePath ?: "")
-        assertEquals("xyz.quaver.pupil", appContext.packageName)
     }
 
     @Test
@@ -64,7 +57,9 @@ class ExampleInstrumentedTest {
         val activityTestRule = ActivityTestRule(LockActivity::class.java)
         val appContext = InstrumentationRegistry.getInstrumentation().targetContext
 
-        activityTestRule.launchActivity(Intent())
+        ContextCompat.getExternalFilesDirs(appContext, null).forEachIndexed { index, file ->
+            Log.i("PUPILD", "$index: ${file?.absolutePath}")
+        }
     }
 
     @Test
@@ -83,37 +78,36 @@ class ExampleInstrumentedTest {
         Log.d("Pupil", data.size.toString())
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     @Test
-    fun test_deleteCodeFromReader() {
+    fun test_downloadWorker() {
         val context = InstrumentationRegistry.getInstrumentation().targetContext
 
-        val json = Json(JsonConfiguration.Stable)
+        val galleryID = 515515
 
-        listOf(
-            getDownloadDirectory(context),
-            File(context.cacheDir, "imageCache")
-        ).forEach { root ->
-            root.listFiles()?.forEach gallery@{ gallery ->
-                val reader = json.parseJson(File(gallery, "reader.json").apply {
-                    if (!exists())
-                        return@gallery
-                }.readText())
-                    .jsonObject.toMutableMap()
+        val worker = DownloadWorker.getInstance(context)
 
-                Log.d("PUPILD", gallery.name)
+        worker.queue.add(galleryID)
 
-                reader.remove("code")
+        while(worker.progress.indexOfKey(galleryID) < 0 || worker.progress[galleryID] != null) {
+            Log.i("PUPILD", worker.progress[galleryID]?.joinToString(" ") ?: "null")
 
-                File(gallery, "reader.json").writeText(JsonObject(reader).toString())
-            }
+            if (worker.progress[galleryID]?.all { !it.isFinite() } == true)
+                break
         }
+
+        Log.i("PUPILD", "DONE!!")
     }
 
     @Test
-    fun test_updateOldReader() {
+    fun test_getReaderOrNull() {
         val context = InstrumentationRegistry.getInstrumentation().targetContext
 
-        updateOldReaderGalleries(context)
+        val galleryID = 1561552
+
+        runBlocking {
+            Log.i("PUPILD", Cache(context).getReader(galleryID)?.title ?: "null")
+        }
+
+        Log.i("PUPILD", Cache(context).getReaderOrNull(galleryID)?.title ?: "null")
     }
 }

app/src/main/AndroidManifest.xml

@@ -4,10 +4,10 @@
     package="xyz.quaver.pupil">
 
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
-        android:maxSdkVersion="28"/>
-    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
-    <uses-permission android:name="android.permission.USE_BIOMETRIC"/>
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+    <uses-permission android:name="android.permission.USE_BIOMETRIC" />
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
     <application
         android:name=".Pupil"
@@ -21,18 +21,18 @@
         tools:replace="android:theme">
 
         <provider
-            android:authorities="${applicationId}.fileprovider"
+            android:authorities="${applicationId}.provider"
             android:name="androidx.core.content.FileProvider"
             android:exported="false"
             android:grantUriPermissions="true">
 
             <meta-data
                 android:name="android.support.FILE_PROVIDER_PATHS"
-                android:resource="@xml/file_paths"/>
+                android:resource="@xml/file_paths" />
 
         </provider>
 
-        <activity android:name=".ui.LockActivity"/>
+        <activity android:name=".ui.LockActivity" />
         <activity
             android:name=".ui.ReaderActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
@@ -55,18 +55,7 @@
                 <category android:name="android.intent.category.BROWSABLE" />
 
                 <data
-                    android:host="히요비.asia"
-                    android:pathPrefix="/reader"
-                    android:scheme="https" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
-
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
-
-                <data
-                    android:host="xn--9w3b15m8vo.asia"
+                    android:host="hiyobi.me"
                     android:pathPrefix="/reader"
                     android:scheme="https" />
             </intent-filter>
@@ -99,20 +88,9 @@
                 <category android:name="android.intent.category.BROWSABLE" />
 
                 <data
-                    android:host="히요비.asia"
-                    android:pathPrefix="/reader"
-                    android:scheme="http" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
-
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
-
-                <data
-                    android:host="xn--9w3b15m8vo.asia"
-                    android:pathPrefix="/reader"
-                    android:scheme="http" />
+                    android:host="hiyobi.me"
+                    android:scheme="http"
+                    android:pathPrefix="/reader" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -140,6 +118,7 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name="net.rdrei.android.dirchooser.DirectoryChooserActivity" />
     </application>
 
 </manifest>

app/src/main/java/xyz/quaver/pupil/Pupil.kt

@@ -30,17 +30,12 @@ import androidx.preference.PreferenceManager
 import com.google.android.gms.common.GooglePlayServicesNotAvailableException
 import com.google.android.gms.common.GooglePlayServicesRepairableException
 import com.google.android.gms.security.ProviderInstaller
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 import xyz.quaver.pupil.util.Histories
-import xyz.quaver.pupil.util.updateOldReaderGalleries
 import java.io.File
 
 class Pupil : MultiDexApplication() {
 
     lateinit var histories: Histories
-    lateinit var downloads: Histories
     lateinit var favorites: Histories
 
     init {
@@ -50,10 +45,20 @@ class Pupil : MultiDexApplication() {
     override fun onCreate() {
         val preference = PreferenceManager.getDefaultSharedPreferences(this)
 
+        try {
+            PreferenceManager.getDefaultSharedPreferences(this).getInt("dl_location", 0)
+        } catch (e: Exception) {
+            preference.edit().remove("dl_location").apply()
+        }
+
         histories = Histories(File(ContextCompat.getDataDir(this), "histories.json"))
-        downloads = Histories(File(ContextCompat.getDataDir(this), "downloads.json"))
         favorites = Histories(File(ContextCompat.getDataDir(this), "favorites.json"))
 
+        val file = preference.getString("dl_location", null)
+
+        if (file?.startsWith("content") == true)
+            preference.edit().remove("dl_location").apply()
+
         try {
             ProviderInstaller.installIfNeeded(this)
         } catch (e: GooglePlayServicesRepairableException) {
@@ -62,30 +67,23 @@ class Pupil : MultiDexApplication() {
             e.printStackTrace()
         }
 
-        if (!preference.getBoolean("channel_created", false)) {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
-                val channel = NotificationChannel("download", getString(R.string.channel_download), NotificationManager.IMPORTANCE_LOW).apply {
-                    description = getString(R.string.channel_download_description)
-                    enableLights(false)
-                    enableVibration(false)
-                    lockscreenVisibility = Notification.VISIBILITY_SECRET
-                }
-                manager.createNotificationChannel(channel)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+            val channel = NotificationChannel("download", getString(R.string.channel_download), NotificationManager.IMPORTANCE_MIN).apply {
+                description = getString(R.string.channel_download_description)
+                enableLights(false)
+                enableVibration(false)
+                lockscreenVisibility = Notification.VISIBILITY_SECRET
             }
-
-            preference.edit().putBoolean("channel_created", true).apply()
+            manager.createNotificationChannel(channel)
         }
 
+        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true)
         AppCompatDelegate.setDefaultNightMode(when (preference.getBoolean("dark_mode", false)) {
             true -> AppCompatDelegate.MODE_NIGHT_YES
             false -> AppCompatDelegate.MODE_NIGHT_NO
         })
 
-        CoroutineScope(Dispatchers.IO).launch {
-            updateOldReaderGalleries(this@Pupil)
-        }
-
         super.onCreate()
     }
 

app/src/main/java/xyz/quaver/pupil/adapters/GalleryBlockAdapter.kt

@@ -18,7 +18,9 @@
 
 package xyz.quaver.pupil.adapters
 
+import android.content.Context
 import android.graphics.drawable.Drawable
+import android.util.Base64
 import android.util.SparseBooleanArray
 import android.view.LayoutInflater
 import android.view.View
@@ -27,9 +29,10 @@ import android.widget.LinearLayout
 import androidx.cardview.widget.CardView
 import androidx.core.content.ContextCompat
 import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.CircularProgressDrawable
 import androidx.vectordrawable.graphics.drawable.Animatable2Compat
 import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat
-import com.bumptech.glide.RequestManager
+import com.bumptech.glide.Glide
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.daimajia.swipe.SwipeLayout
 import com.daimajia.swipe.adapters.RecyclerSwipeAdapter
@@ -37,28 +40,22 @@ import com.daimajia.swipe.interfaces.SwipeAdapterInterface
 import com.google.android.material.chip.Chip
 import kotlinx.android.synthetic.main.item_galleryblock.view.*
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
 import xyz.quaver.hitomi.GalleryBlock
-import xyz.quaver.hitomi.Reader
 import xyz.quaver.pupil.BuildConfig
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
 import xyz.quaver.pupil.types.Tag
-import xyz.quaver.pupil.util.GalleryDownloader
 import xyz.quaver.pupil.util.Histories
-import xyz.quaver.pupil.util.getCachedGallery
+import xyz.quaver.pupil.util.download.Cache
+import xyz.quaver.pupil.util.download.DownloadWorker
 import xyz.quaver.pupil.util.wordCapitalize
-import java.io.File
 import java.util.*
 import kotlin.collections.ArrayList
-import kotlin.collections.HashMap
 import kotlin.concurrent.schedule
 
-class GalleryBlockAdapter(private val glide: RequestManager, private val galleries: List<Pair<GalleryBlock, Deferred<String>>>) : RecyclerSwipeAdapter<RecyclerView.ViewHolder>(), SwipeAdapterInterface {
+class GalleryBlockAdapter(context: Context, private val galleries: List<GalleryBlock>) : RecyclerSwipeAdapter<RecyclerView.ViewHolder>(), SwipeAdapterInterface {
 
     enum class ViewType {
         NEXT,
@@ -66,10 +63,58 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
         PREV
     }
 
+    private val glide = Glide.with(context)
     private lateinit var favorites: Histories
 
+    val timer = Timer()
+
     inner class GalleryViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
-        fun bind(item: Pair<GalleryBlock, Deferred<String>>) {
+        var timerTask: TimerTask? = null
+
+        private fun updateProgress(context: Context, galleryID: Int) = CoroutineScope(Dispatchers.IO).launch {
+            val cache = Cache(context).getCachedGallery(galleryID)
+            val reader = Cache(context).getReaderOrNull(galleryID)
+
+            launch(Dispatchers.Main) main@{
+                if (reader == null) {
+                    view.galleryblock_progressbar.visibility = View.GONE
+                    view.galleryblock_progress_complete.visibility = View.GONE
+                    return@main
+                }
+
+                with(view.galleryblock_progressbar) {
+
+                    progress = cache.listFiles()?.count { file ->
+                        Regex("^[0-9]+.+\$").matches(file.name)
+                    } ?: 0
+
+                    if (visibility == View.GONE) {
+                        visibility = View.VISIBLE
+                        max = reader.galleryInfo.size
+                    }
+
+                    if (progress == max) {
+                        if (completeFlag.get(galleryID, false)) {
+                            with(view.galleryblock_progress_complete) {
+                                setImageResource(R.drawable.ic_progressbar)
+                                visibility = View.VISIBLE
+                            }
+                        } else {
+                            with(view.galleryblock_progress_complete) {
+                                setImageDrawable(AnimatedVectorDrawableCompat.create(context, R.drawable.ic_progressbar_complete).apply {
+                                    this?.start()
+                                })
+                                visibility = View.VISIBLE
+                            }
+                            completeFlag.put(galleryID, true)
+                        }
+                    } else
+                        view.galleryblock_progress_complete.visibility = View.INVISIBLE
+                }
+            }
+        }
+
+        fun bind(galleryBlock: GalleryBlock) {
             with(view) {
                 val resources = context.resources
                 val languages = resources.getStringArray(R.array.languages).map {
@@ -78,16 +123,23 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
                     }
                 }.toMap()
 
-                val (galleryBlock: GalleryBlock, thumbnail: Deferred<String>) = item
-
                 val artists = galleryBlock.artists
                 val series = galleryBlock.series
 
+                galleryblock_thumbnail.setImageDrawable(CircularProgressDrawable(context).also {
+                    it.start()
+                })
+
                 CoroutineScope(Dispatchers.Main).launch {
-                    val cache = thumbnail.await()
+                    val thumbnail = Cache(context).getThumbnail(galleryBlock.id).let {
+                        if (it != null)
+                            Base64.decode(it, Base64.DEFAULT)
+                        else
+                            null
+                    }
 
                     glide
-                        .load(cache)
+                        .load(thumbnail)
                         .skipMemoryCache(true)
                         .diskCacheStrategy(DiskCacheStrategy.NONE)
                         .error(R.drawable.image_broken_variant)
@@ -99,75 +151,28 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
                 }
 
                 //Check cache
-                val readerCache = { File(getCachedGallery(context, galleryBlock.id), "reader.json") }
-                val imageCache = { File(getCachedGallery(context, galleryBlock.id), "images") }
+                val cache = Cache(context).getCachedGallery(galleryBlock.id)
+                val reader = Cache(context).getReaderOrNull(galleryBlock.id)
 
-                try {
-                   Json(JsonConfiguration.Stable)
-                        .parse(Reader.serializer(), readerCache.invoke().readText())
-                } catch(e: Exception) {
-                    readerCache.invoke().delete()
-                }
-
-                if (readerCache.invoke().exists()) {
-                    val reader = Json(JsonConfiguration.Stable)
-                        .parse(Reader.serializer(), readerCache.invoke().readText())
+                if (reader != null) {
+                    val count = cache.listFiles()?.count {
+                        Regex("^[0-9]+.+\$").matches(it.name)
+                    } ?: 0
 
                     with(galleryblock_progressbar) {
                         max = reader.galleryInfo.size
-                        progress = imageCache.invoke().list()?.size ?: 0
+                        progress = count
 
                         visibility = View.VISIBLE
                     }
-                } else {
+                } else
                     galleryblock_progressbar.visibility = View.GONE
-                }
 
-                if (refreshTasks[this@GalleryViewHolder] == null) {
-                    val refresh = Timer(false).schedule(0, 1000) {
-                        post {
-                            with(view.galleryblock_progressbar) {
-                                progress = imageCache.invoke().list()?.size ?: 0
-
-                                if (!readerCache.invoke().exists()) {
-                                    visibility = View.GONE
-                                    max = 0
-                                    progress = 0
-
-                                    view.galleryblock_progress_complete.visibility = View.INVISIBLE
-                                } else {
-                                    if (visibility == View.GONE) {
-                                        val reader = Json(JsonConfiguration.Stable)
-                                            .parse(Reader.serializer(), readerCache.invoke().readText())
-                                        max = reader.galleryInfo.size
-                                        visibility = View.VISIBLE
-                                    }
-
-                                    if (progress == max) {
-                                        if (completeFlag.get(galleryBlock.id, false)) {
-                                            with(view.galleryblock_progress_complete) {
-                                                setImageResource(R.drawable.ic_progressbar)
-                                                visibility = View.VISIBLE
-                                            }
-                                        } else {
-                                            with(view.galleryblock_progress_complete) {
-                                                setImageDrawable(AnimatedVectorDrawableCompat.create(context, R.drawable.ic_progressbar_complete).apply {
-                                                    this?.start()
-                                                })
-                                                visibility = View.VISIBLE
-                                            }
-                                            completeFlag.put(galleryBlock.id, true)
-                                        }
-                                    } else
-                                        view.galleryblock_progress_complete.visibility = View.INVISIBLE
-                                }
-                            }
-                        }
+                if (timerTask == null)
+                    timerTask = timer.schedule(0, 1000) {
+                        updateProgress(context, galleryBlock.id)
                     }
 
-                    refreshTasks[this@GalleryViewHolder] = refresh
-                }
-
                 galleryblock_title.text = galleryBlock.title
                 with(galleryblock_artist) {
                     text = artists.joinToString(", ") { it.wordCapitalize() }
@@ -220,6 +225,7 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
                             else -> null
                         }
                         text = tag.tag.wordCapitalize()
+                        setEnsureMinTouchTargetSize(false)
                         setOnClickListener {
                             for (callback in onChipClickedHandler)
                                 callback.invoke(tag)
@@ -276,7 +282,6 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
         }
     }
 
-    private val refreshTasks = HashMap<GalleryViewHolder, TimerTask>()
     val completeFlag = SparseBooleanArray()
 
     val onChipClickedHandler = ArrayList<((Tag) -> Unit)>()
@@ -335,10 +340,11 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
                 override fun onStartOpen(layout: SwipeLayout?) {
                     mItemManger.closeAllExcept(layout)
 
-                    holder.view.galleryblock_download.text = when(GalleryDownloader.get(gallery.first.id)) {
-                        null -> holder.view.context.getString(R.string.main_download)
-                        else -> holder.view.context.getString(android.R.string.cancel)
-                    }
+                    holder.view.galleryblock_download.text =
+                        if (DownloadWorker.getInstance(holder.view.context).progress.indexOfKey(gallery.id) < 0)
+                            holder.view.context.getString(R.string.main_download)
+                        else
+                            holder.view.context.getString(android.R.string.cancel)
                 }
 
                 override fun onClose(layout: SwipeLayout?) {}
@@ -354,10 +360,8 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
         super.onViewDetachedFromWindow(holder)
 
         if (holder is GalleryViewHolder) {
-            val task = refreshTasks[holder] ?: return
-
-            task.cancel()
-            refreshTasks.remove(holder)
+            holder.timerTask?.cancel()
+            holder.timerTask = null
         }
     }
 

app/src/main/java/xyz/quaver/pupil/adapters/MirrorAdapter.kt

@@ -0,0 +1,85 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.adapters
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.MotionEvent
+import android.view.View
+import android.view.ViewGroup
+import androidx.preference.PreferenceManager
+import androidx.recyclerview.widget.RecyclerView
+import kotlinx.android.synthetic.main.item_mirrors.view.*
+import xyz.quaver.pupil.R
+import java.util.*
+
+class MirrorAdapter(context: Context) : RecyclerView.Adapter<MirrorAdapter.ViewHolder>() {
+
+    class ViewHolder(val view: View) : RecyclerView.ViewHolder(view)
+
+    val mirrors = context.resources.getStringArray(R.array.mirrors).map {
+        it.split('|').let { split ->
+            Pair(split.first(), split.last())
+        }
+    }.toMap()
+
+    val list = mirrors.keys.toMutableList().apply {
+        PreferenceManager.getDefaultSharedPreferences(context)
+            .getString("mirrors", "")!!
+            .split(">")
+            .reversed()
+            .forEach {
+                if (this.contains(it)) {
+                    this.remove(it)
+                    this.add(0, it)
+                }
+            }
+    }
+
+    val onItemMove : ((Int, Int) -> Unit) = { from, to ->
+        Collections.swap(list, from, to)
+        notifyItemMoved(from, to)
+        onItemMoved?.invoke(list)
+    }
+    var onStartDrag : ((ViewHolder) -> Unit)? = null
+    var onItemMoved : ((List<String>) -> (Unit))? = null
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        with(holder.view) {
+            mirror_name.text = mirrors[list.elementAt(position)]
+            mirror_button.setOnTouchListener { _, event ->
+                if (event.action == MotionEvent.ACTION_DOWN)
+                    onStartDrag?.invoke(holder)
+
+                true
+            }
+        }
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        return LayoutInflater.from(parent.context).inflate(
+            R.layout.item_mirrors, parent, false
+        ).let {
+            ViewHolder(it)
+        }
+    }
+
+    override fun getItemCount() = mirrors.size
+
+}

app/src/main/java/xyz/quaver/pupil/adapters/ReaderAdapter.kt

@@ -18,24 +18,89 @@
 
 package xyz.quaver.pupil.adapters
 
+import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.ImageView
+import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.recyclerview.widget.RecyclerView
-import com.bumptech.glide.RequestManager
+import com.bumptech.glide.Glide
+import com.bumptech.glide.ListPreloader
+import com.bumptech.glide.RequestBuilder
+import com.bumptech.glide.integration.recyclerview.RecyclerViewPreloader
 import com.bumptech.glide.load.engine.DiskCacheStrategy
+import com.crashlytics.android.Crashlytics
+import io.fabric.sdk.android.Fabric
+import kotlinx.android.synthetic.main.item_reader.view.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import xyz.quaver.hitomi.Reader
 import xyz.quaver.pupil.BuildConfig
 import xyz.quaver.pupil.R
-import xyz.quaver.pupil.util.getCachedGallery
+import xyz.quaver.pupil.util.download.Cache
+import xyz.quaver.pupil.util.download.DownloadWorker
 import java.io.File
+import java.util.*
+import kotlin.concurrent.schedule
+import kotlin.math.roundToInt
 
-class ReaderAdapter(private val glide: RequestManager,
-                    private val galleryID: Int,
-                    private val images: List<String>) : RecyclerView.Adapter<ReaderAdapter.ViewHolder>() {
+class ReaderAdapter(private val context: Context,
+                    private val galleryID: Int) : RecyclerView.Adapter<ReaderAdapter.ViewHolder>() {
+
+    //region Glide.RecyclerView
+    inner class SizeProvider : ListPreloader.PreloadSizeProvider<File> {
+
+        override fun getPreloadSize(item: File, adapterPosition: Int, itemPosition: Int): IntArray? {
+            return Cache(context).getReaderOrNull(galleryID)?.galleryInfo?.getOrNull(itemPosition)?.let {
+                arrayOf(it.width, it.height).toIntArray()
+            }
+        }
+
+    }
+
+    inner class ModelProvider : ListPreloader.PreloadModelProvider<File> {
+
+        override fun getPreloadItems(position: Int): MutableList<File> {
+            return listOf(Cache(context).getImages(galleryID)?.get(position)).filterNotNullTo(mutableListOf())
+        }
+
+        override fun getPreloadRequestBuilder(item: File): RequestBuilder<*>? {
+            return glide
+                .load(item)
+                .diskCacheStrategy(DiskCacheStrategy.NONE)
+                .skipMemoryCache(true)
+                .error(R.drawable.image_broken_variant)
+                .apply {
+                    if (BuildConfig.CENSOR)
+                        override(5, 8)
+                }
+        }
+
+    }
+    //endregion
+
+    var reader: Reader? = null
+    val glide = Glide.with(context)
+    val timer = Timer()
+
+    val sizeProvider = SizeProvider()
+    val modelProvider = ModelProvider()
+    val preloader = RecyclerViewPreloader<File>(glide, modelProvider, sizeProvider, 10)
 
     var isFullScreen = false
 
+    var onItemClickListener : ((Int) -> (Unit))? = null
+
+    init {
+        CoroutineScope(Dispatchers.IO).launch {
+            reader = Cache(context).getReader(galleryID)
+            launch(Dispatchers.Main) {
+                notifyDataSetChanged()
+            }
+        }
+    }
+
     class ViewHolder(val view: View) : RecyclerView.ViewHolder(view)
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
@@ -47,26 +112,72 @@ class ReaderAdapter(private val glide: RequestManager,
     }
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        holder.view as ImageView
+        holder.view as ConstraintLayout
 
         if (isFullScreen)
             holder.view.layoutParams.height = RecyclerView.LayoutParams.MATCH_PARENT
         else
             holder.view.layoutParams.height = RecyclerView.LayoutParams.WRAP_CONTENT
 
-        glide
-            .load(File(getCachedGallery(holder.view.context, galleryID), images[position]))
-            .diskCacheStrategy(DiskCacheStrategy.NONE)
-            .skipMemoryCache(true)
-            .error(R.drawable.image_broken_variant)
-            .dontTransform()
-            .apply {
-                if (BuildConfig.CENSOR)
-                    override(5, 8)
+        holder.view.image.setOnPhotoTapListener { _, _, _ ->
+            onItemClickListener?.invoke(position)
+        }
+
+        holder.view.container.setOnClickListener {
+            onItemClickListener?.invoke(position)
+        }
+
+        (holder.view.container.layoutParams as ConstraintLayout.LayoutParams)
+            .dimensionRatio = "${reader!!.galleryInfo[position].width}:${reader!!.galleryInfo[position].height}"
+
+        holder.view.reader_index.text = (position+1).toString()
+
+        CoroutineScope(Dispatchers.IO).launch {
+            val images = Cache(context).getImages(galleryID)
+
+            launch(Dispatchers.Main) {
+                if (images?.get(position) != null) {
+                    glide
+                        .load(images[position])
+                        .diskCacheStrategy(DiskCacheStrategy.NONE)
+                        .skipMemoryCache(true)
+                        .error(R.drawable.image_broken_variant)
+                        .apply {
+                            if (BuildConfig.CENSOR)
+                                override(5, 8)
+                        }
+                        .into(holder.view.image)
+                } else {
+                    val progress = DownloadWorker.getInstance(context).progress[galleryID]?.get(position)
+
+                    if (progress?.isNaN() == true) {
+
+                        if (Fabric.isInitialized())
+                            Crashlytics.logException(DownloadWorker.getInstance(context).exception[galleryID]?.get(position))
+
+                        glide
+                            .load(R.drawable.image_broken_variant)
+                            .into(holder.view.image)
+                    } else {
+                        holder.view.reader_item_progressbar.progress =
+                            if (progress?.isInfinite() == true)
+                                100
+                            else
+                                progress?.roundToInt() ?: 0
+
+                        holder.view.image.setImageDrawable(null)
+                    }
+
+                    timer.schedule(1000) {
+                        CoroutineScope(Dispatchers.Main).launch {
+                            notifyItemChanged(position)
+                        }
+                    }
+                }
             }
-            .into(holder.view)
+        }
     }
 
-    override fun getItemCount() = images.size
+    override fun getItemCount() = reader?.galleryInfo?.size ?: 0
 
 }

app/src/main/java/xyz/quaver/pupil/ui/LockActivity.kt

@@ -27,6 +27,7 @@ import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.activity_lock.*
 import kotlinx.android.synthetic.main.fragment_pattern_lock.*
 import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.fragment.PatternLockFragment
 import xyz.quaver.pupil.util.Lock
 import xyz.quaver.pupil.util.LockManager
 

app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt

@@ -18,23 +18,18 @@
 
 package xyz.quaver.pupil.ui
 
-import android.Manifest
 import android.app.Activity
-import android.app.DownloadManager
-import android.content.BroadcastReceiver
-import android.content.Context
 import android.content.Intent
-import android.content.IntentFilter
 import android.graphics.drawable.Animatable
 import android.net.Uri
 import android.os.Bundle
-import android.os.Environment
 import android.text.*
 import android.text.style.AlignmentSpan
 import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.View
 import android.view.WindowManager
+import android.view.inputmethod.EditorInfo
 import android.widget.EditText
 import android.widget.ImageView
 import android.widget.LinearLayout
@@ -42,7 +37,6 @@ import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.cardview.widget.CardView
-import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
 import androidx.core.content.res.ResourcesCompat
 import androidx.core.view.GravityCompat
@@ -51,33 +45,31 @@ import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat
 import com.arlib.floatingsearchview.FloatingSearchView
 import com.arlib.floatingsearchview.suggestions.model.SearchSuggestion
 import com.arlib.floatingsearchview.util.view.SearchInputView
-import com.bumptech.glide.Glide
 import com.google.android.material.appbar.AppBarLayout
-import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.activity_main.*
 import kotlinx.android.synthetic.main.activity_main_content.*
 import kotlinx.coroutines.*
 import kotlinx.serialization.ImplicitReflectionSerializer
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonConfiguration
-import kotlinx.serialization.json.JsonObject
-import kotlinx.serialization.json.content
 import kotlinx.serialization.list
 import kotlinx.serialization.stringify
-import ru.noties.markwon.Markwon
-import xyz.quaver.hitomi.*
+import xyz.quaver.hitomi.GalleryBlock
+import xyz.quaver.hitomi.doSearch
+import xyz.quaver.hitomi.getGalleryIDsFromNozomi
+import xyz.quaver.hitomi.getSuggestionsForQuery
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
 import xyz.quaver.pupil.adapters.GalleryBlockAdapter
 import xyz.quaver.pupil.types.Tag
 import xyz.quaver.pupil.types.TagSuggestion
 import xyz.quaver.pupil.types.Tags
+import xyz.quaver.pupil.ui.dialog.GalleryDialog
 import xyz.quaver.pupil.util.*
+import xyz.quaver.pupil.util.download.Cache
+import xyz.quaver.pupil.util.download.DownloadWorker
 import java.io.File
-import java.io.FileOutputStream
-import java.net.URL
 import java.util.*
-import javax.net.ssl.HttpsURLConnection
 import kotlin.collections.ArrayList
 import kotlin.math.abs
 import kotlin.math.ceil
@@ -98,7 +90,7 @@ class MainActivity : AppCompatActivity() {
         POPULAR
     }
 
-    private val galleries = ArrayList<Pair<GalleryBlock, Deferred<String>>>()
+    private val galleries = ArrayList<GalleryBlock>()
 
     private var query = ""
     set(value) {
@@ -121,7 +113,6 @@ class MainActivity : AppCompatActivity() {
     private var currentPage = 0
 
     private lateinit var histories: Histories
-    private lateinit var downloads: Histories
     private lateinit var favorites: Histories
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -137,14 +128,13 @@ class MainActivity : AppCompatActivity() {
                     finish()
                 }
             }.show()
+
             return
         }
 
         if (lockManager.isNotEmpty())
             startActivityForResult(Intent(this, LockActivity::class.java), REQUEST_LOCK)
 
-        checkPermissions()
-
         val preference = PreferenceManager.getDefaultSharedPreferences(this)
 
         if (Locale.getDefault().language == "ko") {
@@ -161,13 +151,12 @@ class MainActivity : AppCompatActivity() {
 
         with(application as Pupil) {
             this@MainActivity.histories = histories
-            this@MainActivity.downloads = downloads
             this@MainActivity.favorites = favorites
         }
 
         setContentView(R.layout.activity_main)
 
-        checkUpdate()
+        checkUpdate(this)
 
         initView()
     }
@@ -187,6 +176,12 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+
+        (main_recyclerview.adapter as GalleryBlockAdapter).timer.cancel()
+    }
+
     override fun onResume() {
         val preferences = PreferenceManager.getDefaultSharedPreferences(this)
 
@@ -256,125 +251,6 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
-    private fun checkUpdate() {
-
-        val preferences = PreferenceManager.getDefaultSharedPreferences(this)
-        val ignoreUpdateUntil = preferences.getLong("ignore_update_until", 0)
-
-        if (ignoreUpdateUntil > System.currentTimeMillis())
-            return
-
-        fun extractReleaseNote(update: JsonObject, locale: String) : String {
-            val markdown = update["body"]!!.content
-
-            val target = when(locale) {
-                "ko" -> "한국어"
-                "ja" -> "日本語"
-                else -> "English"
-            }
-
-            val releaseNote = Regex("^# Release Note.+$")
-            val language = Regex("^## $target$")
-            val end = Regex("^#.+$")
-
-            var releaseNoteFlag = false
-            var languageFlag = false
-
-            val result = StringBuilder()
-
-            for(line in markdown.lines()) {
-                if (releaseNote.matches(line)) {
-                    releaseNoteFlag = true
-                    continue
-                }
-
-                if (releaseNoteFlag) {
-                    if (language.matches(line)) {
-                        languageFlag = true
-                        continue
-                    }
-                }
-
-                if (languageFlag) {
-                    if (end.matches(line))
-                        break
-
-                    result.append(line+"\n")
-                }
-            }
-
-            return getString(R.string.update_release_note, update["tag_name"]?.content, result.toString())
-        }
-
-        CoroutineScope(Dispatchers.Default).launch {
-            val update =
-                checkUpdate(getString(R.string.release_url)) ?: return@launch
-
-            val (url, fileName) = getApkUrl(update) ?: return@launch
-            fileName ?: return@launch
-
-            val dialog = AlertDialog.Builder(this@MainActivity).apply {
-                setTitle(R.string.update_title)
-                val msg = extractReleaseNote(update, Locale.getDefault().language)
-                setMessage(Markwon.create(context).toMarkdown(msg))
-                setPositiveButton(android.R.string.yes) { _, _ ->
-                    if (!this@MainActivity.hasPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
-                        AlertDialog.Builder(this@MainActivity).apply {
-                            setTitle(R.string.warning)
-                            setMessage(R.string.update_no_permission)
-                            setPositiveButton(android.R.string.ok) { _, _ -> }
-                        }.show()
-
-                        return@setPositiveButton
-                    }
-
-                    val request = DownloadManager.Request(Uri.parse(url)).apply {
-                        setDescription(getString(R.string.update_notification_description))
-                        setTitle(getString(R.string.app_name))
-                        setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName)
-                    }
-
-                    val manager = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
-                    val id = manager.enqueue(request)
-
-                    registerReceiver(object: BroadcastReceiver() {
-                        override fun onReceive(context: Context?, intent: Intent?) {
-                            try {
-                                val install = Intent(Intent.ACTION_VIEW).apply {
-                                    flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_GRANT_READ_URI_PERMISSION
-                                    setDataAndType(manager.getUriForDownloadedFile(id), manager.getMimeTypeForDownloadedFile(id))
-                                }
-
-                                startActivity(install)
-                                unregisterReceiver(this)
-                            } catch (e: Exception) {
-                                AlertDialog.Builder(this@MainActivity).apply {
-                                    setTitle(R.string.update_failed)
-                                    setMessage(R.string.update_failed_message)
-                                    setPositiveButton(android.R.string.ok) { _, _ -> }
-                                }.show()
-                            }
-                        }
-                    }, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
-                }
-                setNegativeButton(R.string.ignore_update) { _, _ ->
-                    preferences.edit()
-                        .putLong("ignore_update_until", System.currentTimeMillis() + 604800000)
-                        .apply()
-                }
-            }
-
-            launch(Dispatchers.Main) {
-                dialog.show()
-            }
-        }
-    }
-
-    private fun checkPermissions() {
-        if (!hasPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE))
-            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), 13489)
-    }
-
     private fun initView() {
         var prevP1 = 0
         main_appbar_layout.addOnOffsetChangedListener(
@@ -495,21 +371,14 @@ class MainActivity : AppCompatActivity() {
                     setTitle(R.string.main_open_gallery_by_id)
 
                     setPositiveButton(android.R.string.ok) { _, _ ->
-                        CoroutineScope(Dispatchers.Default).launch {
-                            try {
-                                val intent = Intent(this@MainActivity, ReaderActivity::class.java)
-                                val gallery =
-                                    getGalleryBlock(editText.text.toString().toInt()) ?: throw Exception()
-                                intent.putExtra("galleryID", gallery.id)
-
-                                startActivity(intent)
-
-                                histories.add(gallery.id)
-                            } catch (e: Exception) {
-                                Snackbar.make(main_layout,
-                                    R.string.main_open_gallery_by_id_error, Snackbar.LENGTH_LONG).show()
+                            val galleryID = editText.text.toString().toInt()
+                            val intent = Intent(this@MainActivity, ReaderActivity::class.java).apply {
+                                putExtra("galleryID", galleryID)
                             }
-                        }
+
+                            startActivity(intent)
+
+                            histories.add(galleryID)
                     }
                 }.show()
             }
@@ -523,7 +392,7 @@ class MainActivity : AppCompatActivity() {
 
     private fun setupRecyclerView() {
         with(main_recyclerview) {
-            adapter = GalleryBlockAdapter(Glide.with(this@MainActivity), galleries).apply {
+            adapter = GalleryBlockAdapter(this@MainActivity, galleries).apply {
                 onChipClickedHandler.add {
                     runOnUiThread {
                         query = it.toQuery()
@@ -536,16 +405,18 @@ class MainActivity : AppCompatActivity() {
                     }
                 }
                 onDownloadClickedHandler = { position ->
-                    val galleryID = galleries[position].first.id
+                    val galleryID = galleries[position].id
 
                     if (!completeFlag.get(galleryID, false)) {
-                        val downloader = GalleryDownloader.get(galleryID)
+                        val worker = DownloadWorker.getInstance(context)
 
-                        if (downloader == null)
-                            GalleryDownloader(context, galleryID, true).start()
+                        if (worker.progress.indexOfKey(galleryID) >= 0)     //download in progress
+                            worker.cancel(galleryID)
                         else {
-                            downloader.cancel()
-                            downloader.clearNotification()
+                            Cache(context).setDownloading(galleryID, true)
+
+                            if (!worker.queue.contains(galleryID))
+                                worker.queue.add(galleryID)
                         }
                     }
 
@@ -553,39 +424,22 @@ class MainActivity : AppCompatActivity() {
                 }
 
                 onDeleteClickedHandler = { position ->
-                    val galleryID = galleries[position].first.id
+                    val galleryID = galleries[position].id
 
                     CoroutineScope(Dispatchers.Default).launch {
-                        with(GalleryDownloader[galleryID]) {
-                            this?.cancelAndJoin()
-                            this?.clearNotification()
-                        }
-                        val cache = File(cacheDir, "imageCache/${galleryID}")
-                        val data = getCachedGallery(context, galleryID)
-                        cache.deleteRecursively()
-                        data.deleteRecursively()
+                        DownloadWorker.getInstance(context).cancel(galleryID)
 
-                        downloads.remove(galleryID)
-
-                        if (this@MainActivity.mode == Mode.DOWNLOAD) {
-                            runOnUiThread {
-                                cancelFetch()
-                                clearGalleries()
-                                fetchGalleries(query, sortMode)
-                                loadBlocks()
-                            }
-                        }
+                        Cache(context).getCachedGallery(galleryID).deleteRecursively()
 
                         histories.remove(galleryID)
 
-                        if (this@MainActivity.mode == Mode.HISTORY) {
+                        if (this@MainActivity.mode != Mode.SEARCH)
                             runOnUiThread {
                                 cancelFetch()
                                 clearGalleries()
                                 fetchGalleries(query, sortMode)
                                 loadBlocks()
                             }
-                        }
 
                         completeFlag.put(galleryID, false)
                     }
@@ -599,7 +453,7 @@ class MainActivity : AppCompatActivity() {
                         return@setOnItemClickListener
 
                     val intent = Intent(this@MainActivity, ReaderActivity::class.java)
-                    val gallery = galleries[position].first
+                    val gallery = galleries[position]
                     intent.putExtra("galleryID", gallery.id)
 
                     //TODO: Maybe sprinkling some transitions will be nice :D
@@ -611,9 +465,12 @@ class MainActivity : AppCompatActivity() {
                     if (v !is CardView)
                         return@setOnItemLongClickListener true
 
-                    val galleryID = galleries[position].first.id
+                    val galleryID = galleries[position].id
 
-                    GalleryDialog(this@MainActivity, galleryID).apply {
+                    GalleryDialog(
+                        this@MainActivity,
+                        galleryID
+                    ).apply {
                         onChipClickedHandler.add {
                             runOnUiThread {
                                 query = it.toQuery()
@@ -856,6 +713,7 @@ class MainActivity : AppCompatActivity() {
                     s.replace(0, s.length, s.toString().toLowerCase(Locale.getDefault()))
             }
         })
+        searchInputView.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI
 
         with(main_searchview as FloatingSearchView) {
             val favoritesFile = File(ContextCompat.getDataDir(context), "favorites_tags.json")
@@ -1106,8 +964,14 @@ class MainActivity : AppCompatActivity() {
                     }
                 }
                 Mode.DOWNLOAD -> {
+                    val downloads = getDownloadDirectory(this@MainActivity).listFiles()?.filter { file ->
+                        file.isDirectory && (file.name.toIntOrNull() != null) && File(file, ".metadata").exists()
+                    }?.map {
+                        it.name.toInt()
+                    } ?: emptyList()
+
                     when {
-                        query.isEmpty() -> downloads.toList().apply {
+                        query.isEmpty() -> downloads.apply {
                             totalItems = size
                         }
                         else -> {
@@ -1155,48 +1019,7 @@ class MainActivity : AppCompatActivity() {
                 for (chunk in chunks)
                     chunk.map { galleryID ->
                         async {
-                            try {
-                                val json = Json(JsonConfiguration.Stable)
-                                val serializer = GalleryBlock.serializer()
-
-                                val galleryBlock =
-                                    File(getCachedGallery(this@MainActivity, galleryID), "galleryBlock.json").let { cache ->
-                                        when {
-                                            cache.exists() -> json.parse(serializer, cache.readText())
-                                            else -> {
-                                                getGalleryBlock(galleryID).apply {
-                                                    this ?: return@apply
-
-                                                    if (cache.parentFile?.exists() == false)
-                                                        cache.parentFile!!.mkdirs()
-
-                                                    cache.writeText(json.stringify(serializer, this))
-                                                }
-                                            }
-                                        }
-                                    } ?: return@async null
-
-                                val thumbnail = async {
-                                    val ext = galleryBlock.thumbnails[0].split('.').last()
-                                    File(getCachedGallery(this@MainActivity, galleryBlock.id), "thumbnail.$ext").apply {
-                                        if (!exists())
-                                            try {
-                                                with(URL(galleryBlock.thumbnails[0]).openConnection() as HttpsURLConnection) {
-                                                    if (this@apply.parentFile?.exists() == false)
-                                                        this@apply.parentFile!!.mkdirs()
-
-                                                    inputStream.copyTo(FileOutputStream(this@apply))
-                                                }
-                                            } catch (e: Exception) {
-                                                delete()
-                                            }
-                                    }.absolutePath
-                                }
-
-                                Pair(galleryBlock, thumbnail)
-                            } catch (e: Exception) {
-                                null
-                            }
+                            Cache(this@MainActivity).getGalleryBlock(galleryID)
                         }
                     }.forEach {
                         val galleryBlock = it.await()

app/src/main/java/xyz/quaver/pupil/ui/ReaderActivity.kt

@@ -18,44 +18,40 @@
 
 package xyz.quaver.pupil.ui
 
-import android.Manifest
 import android.content.Intent
 import android.graphics.drawable.Animatable
 import android.graphics.drawable.Drawable
-import android.net.Uri
 import android.os.Bundle
 import android.view.*
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
 import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.PagerSnapHelper
 import androidx.recyclerview.widget.RecyclerView
 import androidx.vectordrawable.graphics.drawable.Animatable2Compat
 import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat
-import com.bumptech.glide.Glide
 import com.crashlytics.android.Crashlytics
 import com.google.android.material.snackbar.Snackbar
+import io.fabric.sdk.android.Fabric
 import kotlinx.android.synthetic.main.activity_reader.*
 import kotlinx.android.synthetic.main.activity_reader.view.*
 import kotlinx.android.synthetic.main.dialog_numberpicker.view.*
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 import kotlinx.serialization.ImplicitReflectionSerializer
+import xyz.quaver.Code
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
 import xyz.quaver.pupil.adapters.ReaderAdapter
-import xyz.quaver.pupil.util.GalleryDownloader
 import xyz.quaver.pupil.util.Histories
-import xyz.quaver.pupil.util.ItemClickSupport
-import xyz.quaver.pupil.util.hasPermission
+import xyz.quaver.pupil.util.download.Cache
+import xyz.quaver.pupil.util.download.DownloadWorker
+import java.util.*
+import kotlin.concurrent.schedule
 
 class ReaderActivity : AppCompatActivity() {
 
     private var galleryID = 0
-    private val images = ArrayList<String>()
-    private var gallerySize = 0
     private var currentPage = 0
 
     private var isScroll = true
@@ -71,7 +67,7 @@ class ReaderActivity : AppCompatActivity() {
         }
     }
 
-    private lateinit var downloader: GalleryDownloader
+    private val timer = Timer()
 
     private val snapHelper = PagerSnapHelper()
 
@@ -95,19 +91,16 @@ class ReaderActivity : AppCompatActivity() {
 
         handleIntent(intent)
 
-        Crashlytics.setInt("GalleryID", galleryID)
+        if (Fabric.isInitialized())
+            Crashlytics.setInt("GalleryID", galleryID)
 
         if (galleryID == 0) {
             onBackPressed()
             return
         }
 
-        initDownloader()
-
         initView()
-
-        if (!downloader.download)
-            downloader.start()
+        initDownloader()
     }
 
     override fun onNewIntent(intent: Intent) {
@@ -169,7 +162,7 @@ class ReaderActivity : AppCompatActivity() {
                 val view = LayoutInflater.from(this).inflate(R.layout.dialog_numberpicker, findViewById(android.R.id.content), false)
                 with(view.dialog_number_picker) {
                     minValue=1
-                    maxValue=gallerySize
+                    maxValue=reader_recyclerview?.adapter?.itemCount ?: 0
                     value=currentPage
                 }
                 val dialog = AlertDialog.Builder(this).apply {
@@ -202,8 +195,11 @@ class ReaderActivity : AppCompatActivity() {
     override fun onDestroy() {
         super.onDestroy()
 
-        if (::downloader.isInitialized && !downloader.download)
-            downloader.cancel()
+        timer.cancel()
+        (reader_recyclerview?.adapter as? ReaderAdapter)?.timer?.cancel()
+
+        if (!Cache(this).isDownloading(galleryID))
+            DownloadWorker.getInstance(this@ReaderActivity).cancel(galleryID)
     }
 
     override fun onBackPressed() {
@@ -239,102 +235,68 @@ class ReaderActivity : AppCompatActivity() {
     }
 
     private fun initDownloader() {
-        var d: GalleryDownloader? = GalleryDownloader.get(galleryID)
-
-        if (d == null)
-            d = GalleryDownloader(this, galleryID)
-
-        downloader = d.apply {
-            onReaderLoadedHandler = {
-                CoroutineScope(Dispatchers.Main).launch {
-                    title = it.title
-                    with(reader_download_progressbar) {
-                        max = it.galleryInfo.size
-                        progress = 0
-                    }
-                    with(reader_progressbar) {
-                        max = it.galleryInfo.size
-                        progress = 0
-                    }
-
-                    gallerySize = it.galleryInfo.size
-                    menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/${it.galleryInfo.size}"
-                }
-            }
-            onProgressHandler = {
-                CoroutineScope(Dispatchers.Main).launch {
-                    reader_download_progressbar.progress = it
-                    menu?.findItem(R.id.reader_menu_use_hiyobi)?.isVisible = downloader.useHiyobi
-                }
-            }
-            onDownloadedHandler = {
-                val item = it.toList()
-                CoroutineScope(Dispatchers.Main).launch {
-                    if (images.isEmpty()) {
-                        images.addAll(item)
-                        reader_recyclerview.adapter?.notifyDataSetChanged()
-                    } else {
-                        images.add(item.last())
-                        reader_recyclerview.adapter?.notifyItemInserted(images.size-1)
-                    }
-                }
-            }
-            onErrorHandler = {
-                Snackbar
-                    .make(reader_layout, it.message ?: it.javaClass.name, Snackbar.LENGTH_INDEFINITE)
-                    .setAction(R.string.reader_help) {
-                        startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.error_help))))
-                    }
-                    .show()
-                downloader.download = false
-            }
-            onCompleteHandler = {
-                CoroutineScope(Dispatchers.Main).launch {
-                    reader_download_progressbar.visibility = View.GONE
-                }
-            }
-            onNotifyChangedHandler = { notify ->
-                val fab = reader_fab_download
-
-                runOnUiThread {
-                    if (notify) {
-                        val icon = AnimatedVectorDrawableCompat.create(this, R.drawable.ic_downloading)
-                        icon?.registerAnimationCallback(object: Animatable2Compat.AnimationCallback() {
-                            override fun onAnimationEnd(drawable: Drawable?) {
-                                if (downloader.download)
-                                    fab.post {
-                                        icon.start()
-                                        fab.labelText = getString(R.string.reader_fab_download_cancel)
-                                    }
-                                else
-                                    fab.post {
-                                        fab.setImageResource(R.drawable.ic_download)
-                                        fab.labelText = getString(R.string.reader_fab_download)
-                                    }
-                            }
-                        })
-
-                        fab.setImageDrawable(icon)
-                        icon?.start()
-                    } else {
-                        runOnUiThread {
-                            fab.setImageResource(R.drawable.ic_download)
-                        }
-                    }
-                }
-            }
+        val worker = DownloadWorker.getInstance(this).apply {
+            queue.add(galleryID)
         }
 
-        if (downloader.download) {
-            downloader.invokeOnReaderLoaded()
-            downloader.invokeOnNotifyChanged()
+        timer.schedule(1000, 1000) {
+            if (worker.progress.indexOfKey(galleryID) < 0)  //loading
+                return@schedule
+
+            if (worker.progress[galleryID] == null) {      //Gallery not found
+                timer.cancel()
+                Snackbar
+                    .make(reader_layout, R.string.reader_failed_to_find_gallery, Snackbar.LENGTH_INDEFINITE)
+                    .show()
+            }
+
+            runOnUiThread {
+                reader_download_progressbar.max = reader_recyclerview.adapter?.itemCount ?: 0
+                reader_download_progressbar.progress = worker.progress[galleryID]?.count { !it.isFinite() } ?: 0
+                reader_progressbar.max = reader_recyclerview.adapter?.itemCount ?: 0
+
+                if (title == getString(R.string.reader_loading)) {
+                    val reader = (reader_recyclerview.adapter as ReaderAdapter).reader
+
+                    if (reader != null) {
+                        title = reader.title
+                        menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/${reader.galleryInfo.size}"
+
+                        menu?.findItem(R.id.reader_type)?.icon = ContextCompat.getDrawable(this@ReaderActivity,
+                            when (reader.code) {
+                                Code.HITOMI -> R.drawable.hitomi
+                                Code.HIYOBI -> R.drawable.ic_hiyobi
+                                else -> android.R.color.transparent
+                            })
+                    }
+                }
+
+                if (worker.progress[galleryID]?.all { !it.isFinite() } == true) {   //Download finished
+                    reader_download_progressbar.visibility = View.GONE
+
+                    animateDownloadFAB(false)
+                }
+            }
         }
     }
 
     private fun initView() {
         with(reader_recyclerview) {
-            adapter = ReaderAdapter(Glide.with(this@ReaderActivity), galleryID, images)
+            adapter = ReaderAdapter(this@ReaderActivity, galleryID).apply {
+                onItemClickListener = {
+                    if (isScroll) {
+                        isScroll = false
+                        isFullscreen = true
 
+                        scrollMode(false)
+                        fullscreen(true)
+                    } else {
+                        (reader_recyclerview.layoutManager as LinearLayoutManager?)?.scrollToPosition(currentPage) //Moves to next page because currentPage is 1-based indexing
+                    }
+                }
+            }
+
+            //addOnScrollListener((adapter as ReaderAdapter).preloader)
             addOnScrollListener(object: RecyclerView.OnScrollListener() {
                 override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
                     super.onScrolled(recyclerView, dx, dy)
@@ -349,43 +311,24 @@ class ReaderActivity : AppCompatActivity() {
                     if (layoutManager.findFirstVisibleItemPosition() == -1)
                         return
                     currentPage = layoutManager.findFirstVisibleItemPosition()+1
-                    menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/$gallerySize"
+                    menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/${recyclerView.adapter!!.itemCount}"
                     this@ReaderActivity.reader_progressbar.progress = currentPage
                 }
             })
-
-            ItemClickSupport.addTo(this)
-                .setOnItemClickListener { _, _, _ ->
-                    if (isScroll) {
-                        isScroll = false
-                        isFullscreen = true
-
-                        scrollMode(false)
-                        fullscreen(true)
-                    } else {
-                        (reader_recyclerview.layoutManager as LinearLayoutManager?)?.scrollToPosition(currentPage) //Moves to next page because currentPage is 1-based indexing
-                    }
-                }
         }
 
         with(reader_fab_download) {
-            setImageResource(R.drawable.ic_download)
+            animateDownloadFAB(Cache(context).isDownloading(galleryID)) //If download in progress, animate button
+
             setOnClickListener {
+                if (Cache(context).isDownloading(galleryID)) {
+                   Cache(context).setDownloading(galleryID, false)
 
-                if (!this@ReaderActivity.hasPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
-                    AlertDialog.Builder(this@ReaderActivity).apply {
-                        setTitle(R.string.warning)
-                        setMessage(R.string.update_no_permission)
-                        setPositiveButton(android.R.string.ok) { _, _ -> }
-                    }.show()
-
-                    return@setOnClickListener
+                    animateDownloadFAB(false)
+                } else {
+                    Cache(context).setDownloading(galleryID, true)
+                    animateDownloadFAB(true)
                 }
-
-                downloader.download = !downloader.download
-
-                if (!downloader.download)
-                    downloader.clearNotification()
             }
         }
 
@@ -427,4 +370,34 @@ class ReaderActivity : AppCompatActivity() {
 
         (reader_recyclerview.layoutManager as LinearLayoutManager).scrollToPositionWithOffset(currentPage-1, 0)
     }
+
+    private fun animateDownloadFAB(animate: Boolean) {
+        with(reader_fab_download) {
+            if (animate) {
+                val icon = AnimatedVectorDrawableCompat.create(context, R.drawable.ic_downloading)
+
+                icon?.registerAnimationCallback(object : Animatable2Compat.AnimationCallback() {
+                    override fun onAnimationEnd(drawable: Drawable?) {
+                        val worker = DownloadWorker.getInstance(context)
+                        if (worker.progress[galleryID]?.all { !it.isFinite() } == true) // If download is finished, stop animating
+                            post {
+                                setImageResource(R.drawable.ic_download)
+                                labelText = getString(R.string.reader_fab_download)
+                            }
+                        else                                                            // Or continue animate
+                            post {
+                                icon.start()
+                                labelText = getString(R.string.reader_fab_download_cancel)
+                            }
+                    }
+                })
+
+                setImageDrawable(icon)
+                icon?.start()
+            } else {
+                setImageResource(R.drawable.ic_download)
+                labelText = getString(R.string.reader_fab_download)
+            }
+        }
+    }
 }

app/src/main/java/xyz/quaver/pupil/ui/SettingsActivity.kt

@@ -18,44 +18,32 @@
 
 package xyz.quaver.pupil.ui
 
+import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
 import android.os.Bundle
-import android.text.Editable
-import android.text.TextWatcher
-import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.WindowManager
-import android.widget.ArrayAdapter
-import android.widget.LinearLayout
-import android.widget.TextView
-import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
-import androidx.appcompat.app.AppCompatDelegate
-import androidx.core.content.ContextCompat
-import androidx.preference.Preference
-import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.PreferenceManager
 import com.google.android.material.snackbar.Snackbar
-import kotlinx.android.synthetic.main.dialog_default_query.view.*
+import kotlinx.android.synthetic.main.settings_activity.*
 import kotlinx.serialization.ImplicitReflectionSerializer
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.parseList
+import net.rdrei.android.dirchooser.DirectoryChooserActivity
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
-import xyz.quaver.pupil.types.Tags
-import xyz.quaver.pupil.util.Lock
-import xyz.quaver.pupil.util.LockManager
-import xyz.quaver.pupil.util.getDownloadDirectory
+import xyz.quaver.pupil.ui.fragment.LockFragment
+import xyz.quaver.pupil.ui.fragment.SettingsFragment
+import xyz.quaver.pupil.util.*
 import java.io.File
 import java.nio.charset.Charset
-import java.util.*
 
 class SettingsActivity : AppCompatActivity() {
 
-    val REQUEST_LOCK = 38238
-    val REQUEST_RESTORE = 16546
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
@@ -83,369 +71,6 @@ class SettingsActivity : AppCompatActivity() {
         super.onResume()
     }
 
-    class SettingsFragment : PreferenceFragmentCompat() {
-
-        private val suffix = listOf(
-            "B",
-            "kB",
-            "MB",
-            "GB",
-            "TB" //really?
-        )
-
-        override fun onResume() {
-            super.onResume()
-
-            val lockManager = LockManager(context!!)
-
-            findPreference<Preference>("app_lock")?.summary = if (lockManager.locks.isNullOrEmpty()) {
-                getString(R.string.settings_lock_none)
-            } else {
-                lockManager.locks?.joinToString(", ") {
-                    when(it.type) {
-                        Lock.Type.PATTERN -> getString(R.string.settings_lock_pattern)
-                        Lock.Type.PIN -> getString(R.string.settings_lock_pin)
-                        Lock.Type.PASSWORD -> getString(R.string.settings_lock_password)
-                    }
-                }
-            }
-        }
-
-        private fun getDirSize(dir: File) : String {
-            var size = dir.walk().map { it.length() }.sum()
-            var suffixIndex = 0
-
-            while (size >= 1024) {
-                size /= 1024
-                suffixIndex++
-            }
-
-            return getString(R.string.settings_clear_summary, size, suffix[suffixIndex])
-        }
-
-        override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
-            setPreferencesFromResource(R.xml.root_preferences, rootKey)
-
-            with(findPreference<Preference>("app_version")) {
-                this!!
-
-                val manager = context.packageManager
-                val info = manager.getPackageInfo(context.packageName, 0)
-
-                summary = info.versionName
-            }
-
-            with(findPreference<Preference>("delete_cache")) {
-                this!!
-
-                val dir = File(context.cacheDir, "imageCache")
-
-                summary = getDirSize(dir)
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    AlertDialog.Builder(context).apply {
-                        setTitle(R.string.warning)
-                        setMessage(R.string.settings_clear_cache_alert_message)
-                        setPositiveButton(android.R.string.yes) { _, _ ->
-                            if (dir.exists())
-                                dir.deleteRecursively()
-
-                            summary = getDirSize(dir)
-                        }
-                        setNegativeButton(android.R.string.no) { _, _ -> }
-                    }.show()
-
-                    true
-                }
-            }
-
-            with(findPreference<Preference>("delete_downloads")) {
-                this!!
-
-                val dir = getDownloadDirectory(context)
-
-                summary = getDirSize(dir)
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    AlertDialog.Builder(context).apply {
-                        setTitle(R.string.warning)
-                        setMessage(R.string.settings_clear_downloads_alert_message)
-                        setPositiveButton(android.R.string.yes) { _, _ ->
-                            if (dir.exists())
-                                dir.deleteRecursively()
-
-                            val downloads = (activity!!.application as Pupil).downloads
-
-                            downloads.clear()
-
-                            summary = getDirSize(dir)
-                        }
-                        setNegativeButton(android.R.string.no) { _, _ -> }
-                    }.show()
-
-                    true
-                }
-            }
-            with(findPreference<Preference>("clear_history")) {
-                this!!
-
-                val histories = (activity!!.application as Pupil).histories
-
-                summary = getString(R.string.settings_clear_history_summary, histories.size)
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    AlertDialog.Builder(context).apply {
-                        setTitle(R.string.warning)
-                        setMessage(R.string.settings_clear_history_alert_message)
-                        setPositiveButton(android.R.string.yes) { _, _ ->
-                            histories.clear()
-                            summary = getString(R.string.settings_clear_history_summary, histories.size)
-                        }
-                        setNegativeButton(android.R.string.no) { _, _ -> }
-                    }.show()
-
-                    true
-                }
-            }
-
-            with(findPreference<Preference>("default_query")) {
-                this!!
-
-                val preferences = PreferenceManager.getDefaultSharedPreferences(context)
-
-                summary = preferences.getString("default_query", "") ?: ""
-
-                val languages = resources.getStringArray(R.array.languages).map {
-                    it.split("|").let { split ->
-                        Pair(split[0], split[1])
-                    }
-                }.toMap()
-                val reverseLanguages = languages.entries.associate { (k, v) -> v to k }
-
-                val excludeBL = "-male:yaoi"
-                val excludeGuro = listOf("-female:guro", "-male:guro")
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    val dialogView = LayoutInflater.from(context).inflate(
-                        R.layout.dialog_default_query,
-                        LinearLayout(context),
-                        false
-                    )
-
-                    val tags = Tags.parse(
-                        preferences.getString("default_query", "") ?: ""
-                    )
-
-                    summary = tags.toString()
-
-                    with(dialogView.default_query_dialog_language_selector) {
-                        adapter =
-                            ArrayAdapter(
-                                context,
-                                android.R.layout.simple_spinner_dropdown_item,
-                                arrayListOf(
-                                    getString(R.string.default_query_dialog_language_selector_none)
-                                ).apply {
-                                    addAll(languages.values)
-                                }
-                            )
-                        if (tags.any { it.area == "language" && !it.isNegative }) {
-                            val tag = languages[tags.first { it.area == "language" }.tag]
-                            if (tag != null) {
-                                setSelection(
-                                    @Suppress("UNCHECKED_CAST")
-                                    (adapter as ArrayAdapter<String>).getPosition(tag)
-                                )
-                                tags.removeByArea("language", false)
-                            }
-                        }
-                    }
-
-                    with(dialogView.default_query_dialog_BL_checkbox) {
-                        isChecked = tags.contains(excludeBL)
-                        if (tags.contains(excludeBL))
-                            tags.remove(excludeBL)
-                    }
-
-                    with(dialogView.default_query_dialog_guro_checkbox) {
-                        isChecked = excludeGuro.all { tags.contains(it) }
-                        if (excludeGuro.all { tags.contains(it) })
-                            excludeGuro.forEach {
-                                tags.remove(it)
-                            }
-                    }
-
-                    with(dialogView.default_query_dialog_edittext) {
-                        setText(tags.toString(), TextView.BufferType.EDITABLE)
-                        addTextChangedListener(object : TextWatcher {
-                            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
-
-                            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
-
-                            override fun afterTextChanged(s: Editable?) {
-                                s ?: return
-
-                                if (s.any { it.isUpperCase() })
-                                    s.replace(0, s.length, s.toString().toLowerCase(Locale.getDefault()))
-                            }
-                        })
-                    }
-
-                    val dialog = AlertDialog.Builder(context!!).apply {
-                        setView(dialogView)
-                    }.create()
-
-                    dialogView.default_query_dialog_ok.setOnClickListener {
-                        val newTags = Tags.parse(dialogView.default_query_dialog_edittext.text.toString())
-
-                        with(dialogView.default_query_dialog_language_selector) {
-                            if (selectedItemPosition != 0)
-                                newTags.add("language:${reverseLanguages[selectedItem]}")
-                        }
-
-                        if (dialogView.default_query_dialog_BL_checkbox.isChecked)
-                            newTags.add(excludeBL)
-
-                        if (dialogView.default_query_dialog_guro_checkbox.isChecked)
-                            excludeGuro.forEach { tag ->
-                                newTags.add(tag)
-                            }
-
-                        preferenceManager.sharedPreferences.edit().putString("default_query", newTags.toString()).apply()
-                        summary = preferences.getString("default_query", "") ?: ""
-                        tags.clear()
-                        tags.addAll(newTags)
-                        dialog.dismiss()
-                    }
-
-                    dialog.show()
-
-                    true
-                }
-            }
-            with(findPreference<Preference>("app_lock")) {
-                this!!
-
-                val lockManager = LockManager(context)
-
-                summary = if (lockManager.locks.isNullOrEmpty()) {
-                    getString(R.string.settings_lock_none)
-                } else {
-                    lockManager.locks?.joinToString(", ") {
-                        when(it.type) {
-                            Lock.Type.PATTERN -> getString(R.string.settings_lock_pattern)
-                            Lock.Type.PIN -> getString(R.string.settings_lock_pin)
-                            Lock.Type.PASSWORD -> getString(R.string.settings_lock_password)
-                        }
-                    }
-                }
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    val intent = Intent(context, LockActivity::class.java)
-                    activity?.startActivityForResult(intent, (activity as SettingsActivity).REQUEST_LOCK)
-
-                    true
-                }
-            }
-
-            with(findPreference<Preference>("dark_mode")) {
-                this!!
-
-                onPreferenceChangeListener = Preference.OnPreferenceChangeListener { _, newValue ->
-                    AppCompatDelegate.setDefaultNightMode(when (newValue as Boolean) {
-                            true -> AppCompatDelegate.MODE_NIGHT_YES
-                            false -> AppCompatDelegate.MODE_NIGHT_NO
-                    })
-
-                    true
-                }
-            }
-
-            with(findPreference<Preference>("backup")) {
-                this!!
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    File(ContextCompat.getDataDir(context), "favorites.json").copyTo(
-                        File(getDownloadDirectory(context), "favorites.json"),
-                        true
-                    )
-
-                    Snackbar.make(this@SettingsFragment.listView, R.string.settings_backup_snackbar, Snackbar.LENGTH_LONG)
-                        .show()
-
-                    true
-                }
-            }
-
-            with(findPreference<Preference>("restore")) {
-                this!!
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
-                        addCategory(Intent.CATEGORY_OPENABLE)
-                        type = "*/*"
-                    }
-
-                    activity?.startActivityForResult(intent, (activity as SettingsActivity).REQUEST_RESTORE)
-
-                    true
-                }
-            }
-        }
-    }
-
-    class LockFragment : PreferenceFragmentCompat() {
-
-        override fun onResume() {
-            super.onResume()
-
-            val lockManager = LockManager(context!!)
-
-            findPreference<Preference>("lock_pattern")?.summary =
-                if (lockManager.contains(Lock.Type.PATTERN))
-                    getString(R.string.settings_lock_enabled)
-                else
-                    ""
-        }
-
-        override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
-            setPreferencesFromResource(R.xml.lock_preferences, rootKey)
-
-            with(findPreference<Preference>("lock_pattern")) {
-                this!!
-
-                if (LockManager(context!!).contains(Lock.Type.PATTERN))
-                    summary = getString(R.string.settings_lock_enabled)
-
-                onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                    val lockManager = LockManager(context!!)
-
-                    if (lockManager.contains(Lock.Type.PATTERN)) {
-                        AlertDialog.Builder(context).apply {
-                            setTitle(R.string.warning)
-                            setMessage(R.string.settings_lock_remove_message)
-
-                            setPositiveButton(android.R.string.yes) { _, _ ->
-                                lockManager.remove(Lock.Type.PATTERN)
-                                onResume()
-                            }
-                            setNegativeButton(android.R.string.no) { _, _ -> }
-                        }.show()
-                    } else {
-                        val intent = Intent(context, LockActivity::class.java).apply {
-                            putExtra("mode", "add_lock")
-                            putExtra("type", "pattern")
-                        }
-
-                        startActivity(intent)
-                    }
-
-                    true
-                }
-            }
-        }
-    }
-
     override fun onOptionsItemSelected(item: MenuItem?): Boolean {
         when (item?.itemId) {
             android.R.id.home -> onBackPressed()
@@ -493,7 +118,62 @@ class SettingsActivity : AppCompatActivity() {
                     }
                 }
             }
+            REQUEST_DOWNLOAD_FOLDER -> {
+                if (resultCode == Activity.RESULT_OK) {
+                    data?.data?.also { uri ->
+                        val takeFlags: Int =
+                            intent.flags and (Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
+
+                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
+                            contentResolver.takePersistableUriPermission(uri, takeFlags)
+
+                        val file = uri.toFile(this)
+
+                        if (file?.canWrite() != true)
+                            Snackbar.make(
+                                settings,
+                                R.string.settings_dl_location_not_writable,
+                                Snackbar.LENGTH_LONG
+                            ).show()
+                        else
+                            PreferenceManager.getDefaultSharedPreferences(this).edit()
+                                .putString("dl_location", file.canonicalPath)
+                                .apply()
+                    }
+                }
+            }
+            REQUEST_DOWNLOAD_FOLDER_OLD -> {
+                if (resultCode == DirectoryChooserActivity.RESULT_CODE_DIR_SELECTED) {
+                    val directory = data?.getStringExtra(DirectoryChooserActivity.RESULT_SELECTED_DIR)!!
+
+                    if (!File(directory).canWrite())
+                        Snackbar.make(
+                            settings,
+                            R.string.settings_dl_location_not_writable,
+                            Snackbar.LENGTH_LONG
+                        ).show()
+                    else
+                        PreferenceManager.getDefaultSharedPreferences(this).edit()
+                            .putString("dl_location", File(directory).canonicalPath)
+                            .apply()
+                }
+            }
             else -> super.onActivityResult(requestCode, resultCode, data)
         }
     }
+
+    @SuppressLint("InlinedApi")
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
+        when (requestCode) {
+            REQUEST_WRITE_PERMISSION_AND_SAF -> {
+                if (grantResults.firstOrNull() == PackageManager.PERMISSION_GRANTED) {
+                    val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
+                        putExtra("android.content.extra.SHOW_ADVANCED", true)
+                    }
+
+                    startActivityForResult(intent, REQUEST_DOWNLOAD_FOLDER)
+                }
+            }
+        }
+    }
 }

app/src/main/java/xyz/quaver/pupil/ui/dialog/DefaultQueryDialog.kt

@@ -0,0 +1,154 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.ui.dialog
+
+import android.annotation.SuppressLint
+import android.app.Dialog
+import android.content.Context
+import android.os.Bundle
+import android.text.Editable
+import android.text.TextWatcher
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.ArrayAdapter
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.PreferenceManager
+import kotlinx.android.synthetic.main.dialog_default_query.*
+import kotlinx.android.synthetic.main.dialog_default_query.view.*
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.types.Tags
+
+class DefaultQueryDialog(context : Context) : AlertDialog(context) {
+
+    private val languages = context.resources.getStringArray(R.array.languages).map {
+        it.split("|").let { split ->
+            Pair(split[0], split[1])
+        }
+    }.toMap()
+    private val reverseLanguages = languages.entries.associate { (k, v) -> v to k }
+
+    private val excludeBL = "-male:yaoi"
+    private val excludeGuro = listOf("-female:guro", "-male:guro")
+
+    private lateinit var dialogView : View
+
+    var onPositiveButtonClickListener : ((Tags) -> (Unit))? = null
+
+    @SuppressLint("InflateParams")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        initDialog()
+
+        setTitle(R.string.default_query_dialog_title)
+        setView(dialogView)
+        setButton(Dialog.BUTTON_POSITIVE, context.getString(android.R.string.ok)) { _, _ ->
+            val newTags = Tags.parse(default_query_dialog_edittext.text.toString())
+
+            with(default_query_dialog_language_selector) {
+                if (selectedItemPosition != 0)
+                    newTags.add("language:${reverseLanguages[selectedItem]}")
+            }
+
+            if (default_query_dialog_BL_checkbox.isChecked)
+                newTags.add(excludeBL)
+
+            if (default_query_dialog_guro_checkbox.isChecked)
+                excludeGuro.forEach { tag ->
+                    newTags.add(tag)
+                }
+
+            onPositiveButtonClickListener?.invoke(newTags)
+        }
+
+        super.onCreate(savedInstanceState)
+    }
+
+    @SuppressLint("InflateParams")
+    private fun initDialog() {
+        val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+        val tags = Tags.parse(
+            preferences.getString("default_query", "") ?: ""
+        )
+
+        dialogView = LayoutInflater.from(context).inflate(R.layout.dialog_default_query, null)
+
+        with(dialogView.default_query_dialog_language_selector) {
+            adapter =
+                ArrayAdapter(
+                    context,
+                    android.R.layout.simple_spinner_dropdown_item,
+                    arrayListOf(
+                        context.getString(R.string.default_query_dialog_language_selector_none)
+                    ).apply {
+                        addAll(languages.values)
+                    }
+                )
+            if (tags.any { it.area == "language" && !it.isNegative }) {
+                val tag = languages[tags.first { it.area == "language" }.tag]
+                if (tag != null) {
+                    setSelection(
+                        @Suppress("UNCHECKED_CAST")
+                        (adapter as ArrayAdapter<String>).getPosition(tag)
+                    )
+                    tags.removeByArea("language", false)
+                }
+            }
+        }
+
+        with(dialogView.default_query_dialog_BL_checkbox) {
+            isChecked = tags.contains(excludeBL)
+            if (tags.contains(excludeBL))
+                tags.remove(excludeBL)
+        }
+
+        with(dialogView.default_query_dialog_guro_checkbox) {
+            isChecked = excludeGuro.all { tags.contains(it) }
+            if (excludeGuro.all { tags.contains(it) })
+                excludeGuro.forEach {
+                    tags.remove(it)
+                }
+        }
+
+        with(dialogView.default_query_dialog_edittext) {
+            setText(tags.toString(), android.widget.TextView.BufferType.EDITABLE)
+            addTextChangedListener(object : TextWatcher {
+                override fun beforeTextChanged(
+                    s: CharSequence?,
+                    start: Int,
+                    count: Int,
+                    after: Int
+                ) {
+                }
+
+                override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
+
+                override fun afterTextChanged(s: Editable?) {
+                    s ?: return
+
+                    if (s.any { it.isUpperCase() })
+                        s.replace(
+                            0,
+                            s.length,
+                            s.toString().toLowerCase(java.util.Locale.getDefault())
+                        )
+                }
+            })
+        }
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/ui/dialog/DownloadLocationDialog.kt

@@ -0,0 +1,139 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.ui.dialog
+
+import android.Manifest
+import android.annotation.SuppressLint
+import android.app.Activity
+import android.app.Dialog
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.Bundle
+import android.widget.LinearLayout
+import android.widget.RadioButton
+import androidx.appcompat.app.AlertDialog
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import androidx.preference.PreferenceManager
+import kotlinx.android.synthetic.main.item_dl_location.view.*
+import net.rdrei.android.dirchooser.DirectoryChooserActivity
+import net.rdrei.android.dirchooser.DirectoryChooserConfig
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.util.REQUEST_DOWNLOAD_FOLDER
+import xyz.quaver.pupil.util.REQUEST_DOWNLOAD_FOLDER_OLD
+import xyz.quaver.pupil.util.REQUEST_WRITE_PERMISSION_AND_SAF
+import xyz.quaver.pupil.util.byteToString
+import java.io.File
+
+@SuppressLint("InflateParams")
+class DownloadLocationDialog(val activity: Activity) : AlertDialog(activity) {
+
+    private val preference = PreferenceManager.getDefaultSharedPreferences(context)
+    private val buttons = mutableListOf<Pair<RadioButton, File?>>()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        val view = layoutInflater.inflate(R.layout.dialog_dl_location, null) as LinearLayout
+
+        val externalFilesDirs = ContextCompat.getExternalFilesDirs(context, null)
+
+        externalFilesDirs.forEachIndexed { index, dir ->
+
+            dir ?: return@forEachIndexed
+
+            view.addView(layoutInflater.inflate(R.layout.item_dl_location, view, false).apply {
+                location_type.text = context.getString(when (index) {
+                    0 -> R.string.settings_dl_location_internal
+                    else -> R.string.settings_dl_location_removable
+                })
+                location_available.text = context.getString(
+                    R.string.settings_dl_location_available,
+                    byteToString(dir.freeSpace)
+                )
+                setOnClickListener {
+                    buttons.forEach { pair ->
+                        pair.first.isChecked = false
+                    }
+                    button.performClick()
+                    preference.edit().putString("dl_location", dir.canonicalPath).apply()
+                }
+                buttons.add(button to dir)
+            })
+        }
+
+        view.addView(layoutInflater.inflate(R.layout.item_dl_location, view, false).apply {
+            location_type.text = context.getString(R.string.settings_dl_location_custom)
+            setOnClickListener {
+                buttons.forEach { pair ->
+                    pair.first.isChecked = false
+                }
+                button.performClick()
+
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+
+                    if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
+                        ActivityCompat.requestPermissions(activity, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), REQUEST_WRITE_PERMISSION_AND_SAF)
+                    else {
+                        val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
+                            putExtra("android.content.extra.SHOW_ADVANCED", true)
+                        }
+
+                        activity.startActivityForResult(intent, REQUEST_DOWNLOAD_FOLDER)
+                    }
+
+                    dismiss()
+                } else {    // Can't use SAF on old Androids!
+                    val config = DirectoryChooserConfig.builder()
+                        .newDirectoryName("Pupil")
+                        .allowNewDirectoryNameModification(true)
+                        .build()
+
+                    val intent = Intent(context, DirectoryChooserActivity::class.java).apply {
+                        putExtra(DirectoryChooserActivity.EXTRA_CONFIG, config)
+                    }
+
+                    activity.startActivityForResult(intent, REQUEST_DOWNLOAD_FOLDER_OLD)
+                    dismiss()
+                }
+            }
+            buttons.add(button to null)
+        })
+
+        val pref = preference.getString("dl_location", null)
+        val index = externalFilesDirs.indexOfFirst {
+            it.canonicalPath == pref
+        }
+
+        if (index < 0)
+            buttons.last().first.isChecked = true
+        else
+            buttons[index].first.isChecked = true
+
+        setTitle(R.string.settings_dl_location)
+
+        setView(view)
+
+        setButton(Dialog.BUTTON_POSITIVE, context.getText(android.R.string.ok)) { _, _ ->
+            dismiss()
+        }
+
+        super.onCreate(savedInstanceState)
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/ui/dialog/GalleryDialog.kt

@@ -1,6 +1,6 @@
 /*
  *     Pupil, Hitomi.la viewer for Android
- *     Copyright (C) 2019  tom5079
+ *     Copyright (C) 2020  tom5079
  *
  *     This program is free software: you can redistribute it and/or modify
  *     it under the terms of the GNU General Public License as published by
@@ -16,7 +16,7 @@
  *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package xyz.quaver.pupil.ui
+package xyz.quaver.pupil.ui.dialog
 
 import android.app.Dialog
 import android.content.Context
@@ -32,21 +32,25 @@ import androidx.recyclerview.widget.RecyclerView
 import com.bumptech.glide.Glide
 import com.google.android.material.chip.Chip
 import com.google.android.material.snackbar.Snackbar
-import kotlinx.android.synthetic.main.dialog_galleryblock.*
+import kotlinx.android.synthetic.main.dialog_gallery.*
 import kotlinx.android.synthetic.main.gallery_details.view.*
 import kotlinx.android.synthetic.main.item_gallery_details.view.*
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.launch
 import xyz.quaver.hitomi.Gallery
 import xyz.quaver.hitomi.GalleryBlock
 import xyz.quaver.hitomi.getGallery
-import xyz.quaver.hitomi.getGalleryBlock
 import xyz.quaver.pupil.BuildConfig
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
 import xyz.quaver.pupil.adapters.GalleryBlockAdapter
 import xyz.quaver.pupil.adapters.ThumbnailAdapter
 import xyz.quaver.pupil.types.Tag
+import xyz.quaver.pupil.ui.ReaderActivity
 import xyz.quaver.pupil.util.ItemClickSupport
+import xyz.quaver.pupil.util.download.Cache
 import xyz.quaver.pupil.util.wordCapitalize
 
 class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(context) {
@@ -63,7 +67,7 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.dialog_galleryblock)
+        setContentView(R.layout.dialog_gallery)
 
         window?.attributes.apply {
             this ?: return@apply
@@ -182,6 +186,8 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
                                     else -> tag.tag.wordCapitalize()
                                 }
 
+                                setEnsureMinTouchTargetSize(false)
+
                                 setOnClickListener {
                                     onChipClickedHandler.forEach { handler ->
                                         handler.invoke(tag)
@@ -218,9 +224,9 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
 
     private fun addRelated(gallery: Gallery) {
         val inflater = LayoutInflater.from(context)
-        val galleries = ArrayList<Pair<GalleryBlock, Deferred<String>>>()
+        val galleries = ArrayList<GalleryBlock>()
 
-        val adapter = GalleryBlockAdapter(glide, galleries).apply {
+        val adapter = GalleryBlockAdapter(context, galleries).apply {
             onChipClickedHandler.add { tag ->
                 this@GalleryDialog.onChipClickedHandler.forEach { handler ->
                     handler.invoke(tag)
@@ -231,11 +237,11 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
         CoroutineScope(Dispatchers.Main).launch {
             gallery.related.forEachIndexed { i, galleryID ->
                 async(Dispatchers.IO) {
-                    getGalleryBlock(galleryID)
+                    Cache(context).getGalleryBlock(galleryID)
                 }.let {
                     val galleryBlock = it.await() ?: return@let
 
-                    galleries.add(Pair(galleryBlock, GlobalScope.async { galleryBlock.thumbnails.first() }))
+                    galleries.add(galleryBlock)
                     adapter.notifyItemInserted(i)
                 }
             }
@@ -251,12 +257,15 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
                 ItemClickSupport.addTo(this)
                     .setOnItemClickListener { _, position, _ ->
                         context.startActivity(Intent(context, ReaderActivity::class.java).apply {
-                            putExtra("galleryID", galleries[position].first.id)
+                            putExtra("galleryID", galleries[position].id)
                         })
-                        (context.applicationContext as Pupil).histories.add(galleries[position].first.id)
+                        (context.applicationContext as Pupil).histories.add(galleries[position].id)
                     }
                     .setOnItemLongClickListener { _, position, _ ->
-                        GalleryDialog(context, galleries[position].first.id).apply {
+                        GalleryDialog(
+                            context,
+                            galleries[position].id
+                        ).apply {
                             onChipClickedHandler.add { tag ->
                                 this@GalleryDialog.onChipClickedHandler.forEach { it.invoke(tag) }
                             }

app/src/main/java/xyz/quaver/pupil/ui/dialog/MirrorDialog.kt

@@ -0,0 +1,97 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.ui.dialog
+
+import android.annotation.SuppressLint
+import android.app.Dialog
+import android.content.Context
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.PreferenceManager
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.adapters.MirrorAdapter
+
+class MirrorDialog(context: Context) : AlertDialog(context) {
+
+    class ItemTouchHelperCallback : ItemTouchHelper.Callback() {
+
+        var onMoveItem : ((Int, Int) -> (Unit))? = null
+
+        override fun getMovementFlags(
+            recyclerView: RecyclerView,
+            viewHolder: RecyclerView.ViewHolder
+        ) = makeMovementFlags(ItemTouchHelper.UP or ItemTouchHelper.DOWN, 0)
+
+        override fun onMove(
+            recyclerView: RecyclerView,
+            viewHolder: RecyclerView.ViewHolder,
+            target: RecyclerView.ViewHolder
+        ): Boolean {
+            onMoveItem?.invoke(viewHolder.adapterPosition, target.adapterPosition)
+            return true
+        }
+
+        override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+
+        }
+    }
+
+    private lateinit var recyclerView: RecyclerView
+
+    @SuppressLint("InflateParams")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        initDialog()
+
+        setTitle(R.string.settings_mirror_title)
+        setView(recyclerView)
+        setButton(Dialog.BUTTON_POSITIVE, context.getString(android.R.string.ok)) { _, _ -> }
+
+        super.onCreate(savedInstanceState)
+    }
+
+    private fun initDialog() {
+        recyclerView = RecyclerView(context).apply recyclerview@{
+            addItemDecoration(DividerItemDecoration(context, DividerItemDecoration.VERTICAL))
+            layoutManager = LinearLayoutManager(context)
+            adapter = MirrorAdapter(context).apply adapter@{
+                val itemTouchHelper = ItemTouchHelper(ItemTouchHelperCallback().apply {
+                    onMoveItem = this@adapter.onItemMove
+                }).apply {
+                    attachToRecyclerView(this@recyclerview)
+                }
+
+                onStartDrag = {
+                    itemTouchHelper.startDrag(it)
+                }
+
+                onItemMoved = {
+                    PreferenceManager.getDefaultSharedPreferences(context)
+                        .edit()
+                        .putString("mirrors", it.joinToString(">"))
+                        .apply()
+                }
+            }
+        }
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/ui/fragment/LockFragment.kt

@@ -0,0 +1,81 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.ui.fragment
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.LockActivity
+import xyz.quaver.pupil.util.Lock
+import xyz.quaver.pupil.util.LockManager
+
+class LockFragment : PreferenceFragmentCompat() {
+
+    override fun onResume() {
+        super.onResume()
+
+        val lockManager = LockManager(context!!)
+
+        findPreference<Preference>("lock_pattern")?.summary =
+            if (lockManager.contains(Lock.Type.PATTERN))
+                getString(R.string.settings_lock_enabled)
+            else
+                ""
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.lock_preferences, rootKey)
+
+        with(findPreference<Preference>("lock_pattern")) {
+            this!!
+
+            if (LockManager(context!!).contains(Lock.Type.PATTERN))
+                summary = getString(R.string.settings_lock_enabled)
+
+            onPreferenceClickListener = Preference.OnPreferenceClickListener {
+                val lockManager = LockManager(context!!)
+
+                if (lockManager.contains(Lock.Type.PATTERN)) {
+                    AlertDialog.Builder(context).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_lock_remove_message)
+
+                        setPositiveButton(android.R.string.yes) { _, _ ->
+                            lockManager.remove(Lock.Type.PATTERN)
+                            onResume()
+                        }
+                        setNegativeButton(android.R.string.no) { _, _ -> }
+                    }.show()
+                } else {
+                    val intent = Intent(context, LockActivity::class.java).apply {
+                        putExtra("mode", "add_lock")
+                        putExtra("type", "pattern")
+                    }
+
+                    startActivity(intent)
+                }
+
+                true
+            }
+        }
+    }
+}

app/src/main/java/xyz/quaver/pupil/ui/fragment/PatternLockFragment.kt

@@ -16,7 +16,7 @@
  *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package xyz.quaver.pupil.ui
+package xyz.quaver.pupil.ui.fragment
 
 import android.os.Bundle
 import android.view.LayoutInflater

app/src/main/java/xyz/quaver/pupil/ui/fragment/SettingsFragment.kt

@@ -0,0 +1,288 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.ui.fragment
+
+import android.content.Intent
+import android.content.SharedPreferences
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.content.ContextCompat
+import androidx.preference.Preference
+import androidx.preference.PreferenceCategory
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.PreferenceManager
+import com.google.android.material.snackbar.Snackbar
+import xyz.quaver.pupil.Pupil
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.LockActivity
+import xyz.quaver.pupil.ui.SettingsActivity
+import xyz.quaver.pupil.ui.dialog.DefaultQueryDialog
+import xyz.quaver.pupil.ui.dialog.DownloadLocationDialog
+import xyz.quaver.pupil.ui.dialog.MirrorDialog
+import xyz.quaver.pupil.util.*
+import java.io.File
+
+
+class SettingsFragment :
+    PreferenceFragmentCompat(),
+    Preference.OnPreferenceClickListener,
+    Preference.OnPreferenceChangeListener,
+    SharedPreferences.OnSharedPreferenceChangeListener {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        PreferenceManager.getDefaultSharedPreferences(context).registerOnSharedPreferenceChangeListener(this)
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        val lockManager = LockManager(context!!)
+
+        findPreference<Preference>("app_lock")?.summary = if (lockManager.locks.isNullOrEmpty()) {
+            getString(R.string.settings_lock_none)
+        } else {
+            lockManager.locks?.joinToString(", ") {
+                when(it.type) {
+                    Lock.Type.PATTERN -> getString(R.string.settings_lock_pattern)
+                    Lock.Type.PIN -> getString(R.string.settings_lock_pin)
+                    Lock.Type.PASSWORD -> getString(R.string.settings_lock_password)
+                }
+            }
+        }
+    }
+
+    private fun getDirSize(dir: File) : String {
+        val size = dir.walk().map { it.length() }.sum()
+
+        return getString(R.string.settings_clear_summary, byteToString(size))
+    }
+
+    override fun onPreferenceClick(preference: Preference?): Boolean {
+        with (preference) {
+            this ?: return false
+
+            when (key) {
+                "app_version" -> {
+                    checkUpdate(activity as SettingsActivity, true)
+                }
+                "delete_cache" -> {
+                    val dir = File(context.cacheDir, "imageCache")
+
+                    AlertDialog.Builder(context).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_clear_cache_alert_message)
+                        setPositiveButton(android.R.string.yes) { _, _ ->
+                            if (dir.exists())
+                                dir.deleteRecursively()
+
+                            summary = getDirSize(dir)
+                        }
+                        setNegativeButton(android.R.string.no) { _, _ -> }
+                    }.show()
+                }
+                "delete_downloads" -> {
+                    val dir = getDownloadDirectory(context)
+
+                    AlertDialog.Builder(context).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_clear_downloads_alert_message)
+                        setPositiveButton(android.R.string.yes) { _, _ ->
+                            if (dir.exists())
+                                dir.deleteRecursively()
+
+                            summary = getDirSize(dir)
+                        }
+                        setNegativeButton(android.R.string.no) { _, _ -> }
+                    }.show()
+                }
+                "clear_history" -> {
+                    val histories = (context.applicationContext as Pupil).histories
+
+                    AlertDialog.Builder(context).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_clear_history_alert_message)
+                        setPositiveButton(android.R.string.yes) { _, _ ->
+                            histories.clear()
+                            summary = getString(R.string.settings_clear_history_summary, histories.size)
+                        }
+                        setNegativeButton(android.R.string.no) { _, _ -> }
+                    }.show()
+                }
+                "dl_location" -> {
+                    DownloadLocationDialog(activity!!).show()
+                }
+                "default_query" -> {
+                    DefaultQueryDialog(context).apply {
+                        onPositiveButtonClickListener = { newTags ->
+                            sharedPreferences.edit().putString("default_query", newTags.toString()).apply()
+                            summary = newTags.toString()
+                        }
+                    }.show()
+                }
+                "app_lock" -> {
+                    val intent = Intent(context, LockActivity::class.java)
+                    activity?.startActivityForResult(intent, REQUEST_LOCK)
+                }
+                "mirrors" -> {
+                    MirrorDialog(context)
+                        .show()
+                }
+                "backup" -> {
+                    File(ContextCompat.getDataDir(context), "favorites.json").copyTo(
+                        File(getDownloadDirectory(context), "favorites.json"),
+                        true
+                    )
+
+                    Snackbar.make(this@SettingsFragment.listView, R.string.settings_backup_snackbar, Snackbar.LENGTH_LONG)
+                        .show()
+                }
+                "restore" -> {
+                    val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
+                        addCategory(Intent.CATEGORY_OPENABLE)
+                        type = "*/*"
+                    }
+
+                    activity?.startActivityForResult(intent, REQUEST_RESTORE)
+                }
+                else -> return false
+            }
+        }
+
+        return true
+    }
+
+    override fun onPreferenceChange(preference: Preference?, newValue: Any?): Boolean {
+        with (preference) {
+            this ?: return false
+
+            when (key) {
+                "dark_mode" -> {
+                    AppCompatDelegate.setDefaultNightMode(when (newValue as Boolean) {
+                        true -> AppCompatDelegate.MODE_NIGHT_YES
+                        false -> AppCompatDelegate.MODE_NIGHT_NO
+                    })
+                }
+                else -> return false
+            }
+        }
+
+        return true
+    }
+
+    override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
+        when (key) {
+            "dl_location" -> {
+                findPreference<Preference>(key)?.summary = getDownloadDirectory(context!!).canonicalPath
+            }
+        }
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.root_preferences, rootKey)
+
+        initPreferences()
+    }
+
+    private fun initPreferences() {
+        for (i in 0 until preferenceScreen.preferenceCount) {
+
+            preferenceScreen.getPreference(i).run {
+                if (this is PreferenceCategory)
+                    (0 until preferenceCount).map { getPreference(it) }
+                else
+                    listOf(this)
+            }.forEach { preference ->
+                with (preference) {
+
+                    when (key) {
+                        "app_version" -> {
+                            val manager = context.packageManager
+                            val info = manager.getPackageInfo(context.packageName, 0)
+                            summary = context.getString(R.string.settings_app_version_description, info.versionName)
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "delete_cache" -> {
+                            val dir = File(context.cacheDir, "imageCache")
+                            summary = getDirSize(dir)
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "delete_downloads" -> {
+                            val dir = getDownloadDirectory(context)
+                            summary = getDirSize(dir)
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "clear_history" -> {
+                            val histories = (activity!!.application as Pupil).histories
+                            summary = getString(R.string.settings_clear_history_summary, histories.size)
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "dl_location" -> {
+                            summary = getDownloadDirectory(context).canonicalPath
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "default_query" -> {
+                            val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+                            summary = preferences.getString("default_query", "") ?: ""
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "app_lock" -> {
+                            val lockManager = LockManager(context)
+                            summary =
+                                if (lockManager.locks.isNullOrEmpty()) {
+                                    getString(R.string.settings_lock_none)
+                                } else {
+                                    lockManager.locks?.joinToString(", ") {
+                                        when (it.type) {
+                                            Lock.Type.PATTERN -> getString(R.string.settings_lock_pattern)
+                                            Lock.Type.PIN -> getString(R.string.settings_lock_pin)
+                                            Lock.Type.PASSWORD -> getString(R.string.settings_lock_password)
+                                        }
+                                    }
+                                }
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "mirrors" -> {
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "dark_mode" -> {
+                            onPreferenceChangeListener = this@SettingsFragment
+                        }
+                        "backup" -> {
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "restore" -> {
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                    }
+
+                }
+            }
+        }
+    }
+}

app/src/main/java/xyz/quaver/pupil/util/ConstValues.kt

@@ -0,0 +1,25 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.util
+
+const val REQUEST_LOCK = 38238
+const val REQUEST_RESTORE = 16546
+const val REQUEST_DOWNLOAD_FOLDER = 3874
+const val REQUEST_DOWNLOAD_FOLDER_OLD = 3425
+const val REQUEST_WRITE_PERMISSION_AND_SAF = 13900

app/src/main/java/xyz/quaver/pupil/util/GalleryDownloader.kt

@@ -1,327 +0,0 @@
-/*
- *     Pupil, Hitomi.la viewer for Android
- *     Copyright (C) 2019  tom5079
- *
- *     This program is free software: you can redistribute it and/or modify
- *     it under the terms of the GNU General Public License as published by
- *     the Free Software Foundation, either version 3 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-package xyz.quaver.pupil.util
-
-import android.app.PendingIntent
-import android.content.Context
-import android.content.ContextWrapper
-import android.content.Intent
-import android.util.SparseArray
-import androidx.core.app.NotificationCompat
-import androidx.core.app.NotificationManagerCompat
-import androidx.core.app.TaskStackBuilder
-import androidx.preference.PreferenceManager
-import com.crashlytics.android.Crashlytics
-import kotlinx.coroutines.*
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
-import xyz.quaver.hitomi.Reader
-import xyz.quaver.hitomi.getReader
-import xyz.quaver.hitomi.getReferer
-import xyz.quaver.hitomi.urlFromUrlFromHash
-import xyz.quaver.hiyobi.cookie
-import xyz.quaver.hiyobi.createImgList
-import xyz.quaver.hiyobi.user_agent
-import xyz.quaver.pupil.Pupil
-import xyz.quaver.pupil.R
-import xyz.quaver.pupil.ui.ReaderActivity
-import java.io.File
-import java.io.FileOutputStream
-import java.net.URL
-import java.util.*
-import javax.net.ssl.HttpsURLConnection
-import kotlin.collections.ArrayList
-import kotlin.concurrent.schedule
-
-class GalleryDownloader(
-    base: Context,
-    private val galleryID: Int,
-    _notify: Boolean = false
-) : ContextWrapper(base) {
-
-    private val downloads = (applicationContext as Pupil).downloads
-    var useHiyobi = PreferenceManager.getDefaultSharedPreferences(this).getBoolean("use_hiyobi", false)
-
-    var download: Boolean = false
-        set(value) {
-            if (value) {
-                field = true
-                notificationManager.notify(galleryID, notificationBuilder.build())
-
-                if (reader?.isActive == false && downloadJob?.isActive != true) {
-                    val data = File(getDownloadDirectory(this), galleryID.toString())
-                    val cache = File(cacheDir, "imageCache/$galleryID")
-
-                    if (File(cache, "images").exists() && !data.exists()) {
-                        cache.copyRecursively(data, true)
-                        cache.deleteRecursively()
-                    }
-
-                    field = false
-                }
-
-                downloads.add(galleryID)
-            } else {
-                field = false
-            }
-
-            onNotifyChangedHandler?.invoke(value)
-        }
-
-    private val reader: Deferred<Reader?>?
-    private var downloadJob: Job? = null
-
-    private lateinit var notificationBuilder: NotificationCompat.Builder
-    private lateinit var notificationManager: NotificationManagerCompat
-
-    var onReaderLoadedHandler: ((Reader) -> Unit)? = null
-    var onProgressHandler: ((Int) -> Unit)? = null
-    var onDownloadedHandler: ((List<String>) -> Unit)? = null
-    var onErrorHandler: ((Exception) -> Unit)? = null
-    var onCompleteHandler: (() -> Unit)? = null
-    var onNotifyChangedHandler: ((Boolean) -> Unit)? = null
-
-    companion object : SparseArray<GalleryDownloader>()
-
-    init {
-        put(galleryID, this)
-
-        initNotification()
-
-        reader = CoroutineScope(Dispatchers.IO).async {
-            try {
-                download = _notify
-                val json = Json(JsonConfiguration.Stable)
-                val serializer = Reader.serializer()
-
-                //Check cache
-                val cache = File(getCachedGallery(this@GalleryDownloader, galleryID), "reader.json")
-
-                try {
-                    json.parse(serializer, cache.readText())
-                } catch(e: Exception) {
-                    cache.delete()
-                }
-
-                if (cache.exists()) {
-                    val cached = json.parse(serializer, cache.readText())
-
-                    if (cached.galleryInfo.isNotEmpty()) {
-                        useHiyobi = cached.code == Reader.Code.HIYOBI
-
-                        onReaderLoadedHandler?.invoke(cached)
-
-                        return@async cached
-                    }
-                }
-
-                //Cache doesn't exist. Load from internet
-                val reader = when {
-                    useHiyobi -> {
-                        try {
-                            xyz.quaver.hiyobi.getReader(galleryID)
-                        } catch(e: Exception) {
-                            useHiyobi = false
-                            getReader(galleryID)
-                        }
-                    }
-                    else -> {
-                        getReader(galleryID)
-                    }
-                }
-
-                if (reader.galleryInfo.isNotEmpty()) {
-                    //Save cache
-                    if (cache.parentFile?.exists() == false)
-                        cache.parentFile!!.mkdirs()
-
-                    cache.writeText(json.stringify(serializer, reader))
-                }
-
-                reader
-            } catch (e: Exception) {
-                Crashlytics.logException(e)
-                onErrorHandler?.invoke(e)
-                null
-            }
-        }
-    }
-
-    private fun webpUrlFromUrl(url: String) = url.replace("/galleries/", "/webp/") + ".webp"
-
-    fun start() {
-        downloadJob = CoroutineScope(Dispatchers.Default).launch {
-            val reader = reader!!.await() ?: return@launch
-
-            notificationBuilder.setContentTitle(reader.title)
-
-            val list = ArrayList<String>()
-
-            onReaderLoadedHandler?.invoke(reader)
-
-            notificationBuilder
-                .setProgress(reader.galleryInfo.size, 0, false)
-                .setContentText("0/${reader.galleryInfo.size}")
-
-            reader.galleryInfo.chunked(4).forEachIndexed { chunkIndex, chunked ->
-                chunked.mapIndexed { i, galleryInfo ->
-                    val index = chunkIndex*4+i
-
-                    async(Dispatchers.IO) {
-                        val url = when(useHiyobi) {
-                            true -> createImgList(galleryID, reader)[index].path
-                            false -> when {
-                                (!galleryInfo.hash.isNullOrBlank()) and (galleryInfo.haswebp == 1) ->
-                                    urlFromUrlFromHash(galleryID, galleryInfo, "webp")
-                                else ->
-                                    urlFromUrlFromHash(galleryID, galleryInfo)
-                            }
-                        }
-
-                        val name = "$index".padStart(4, '0')
-                        val ext = url.split('.').last()
-
-                        val cache = File(getCachedGallery(this@GalleryDownloader, galleryID), "images/$name.$ext")
-
-                        if (!cache.exists())
-                            try {
-                                with(URL(url).openConnection() as HttpsURLConnection) {
-                                    if (useHiyobi) {
-                                        setRequestProperty("User-Agent", user_agent)
-                                        setRequestProperty("Cookie", cookie)
-                                    } else
-                                        setRequestProperty("Referer", getReferer(galleryID))
-
-                                    if (cache.parentFile?.exists() == false)
-                                        cache.parentFile!!.mkdirs()
-
-                                    inputStream.copyTo(FileOutputStream(cache))
-                                }
-                            } catch (e: Exception) {
-                                cache.delete()
-
-                                onErrorHandler?.invoke(e)
-
-                                notificationBuilder
-                                    .setContentTitle(reader.title)
-                                    .setContentText(getString(R.string.reader_notification_error))
-                                    .setProgress(0, 0, false)
-
-                                notificationManager.notify(galleryID, notificationBuilder.build())
-                            }
-
-                        "images/$name.$ext"
-                    }
-                }.forEach {
-                    list.add(it.await())
-
-                    val index = list.size
-
-                    onProgressHandler?.invoke(index)
-
-                    notificationBuilder
-                        .setProgress(reader.galleryInfo.size, index, false)
-                        .setContentText("$index/${reader.galleryInfo.size}")
-
-                    if (download)
-                        notificationManager.notify(galleryID, notificationBuilder.build())
-
-                    onDownloadedHandler?.invoke(list)
-                }
-            }
-
-            Timer(false).schedule(1000) {
-                notificationBuilder
-                    .setContentTitle(reader.title)
-                    .setContentText(getString(R.string.reader_notification_complete))
-                    .setProgress(0, 0, false)
-
-                if (download) {
-                    File(cacheDir, "imageCache/${galleryID}").let {
-                        if (it.exists()) {
-                            val target = File(getDownloadDirectory(this@GalleryDownloader), galleryID.toString())
-
-                            if (!target.exists())
-                                target.mkdirs()
-
-                            it.copyRecursively(target, true)
-                            it.deleteRecursively()
-                        }
-                    }
-
-                    notificationManager.notify(galleryID, notificationBuilder.build())
-
-                    download = false
-                }
-
-                onCompleteHandler?.invoke()
-            }
-
-            remove(galleryID)
-        }
-    }
-
-    fun cancel() {
-        downloadJob?.cancel()
-
-        remove(galleryID)
-    }
-
-    suspend fun cancelAndJoin() {
-        downloadJob?.cancelAndJoin()
-
-        remove(galleryID)
-    }
-
-    fun invokeOnReaderLoaded() {
-        CoroutineScope(Dispatchers.Default).launch {
-            onReaderLoadedHandler?.invoke(reader?.await() ?: return@launch)
-        }
-    }
-
-    fun clearNotification() {
-        notificationManager.cancel(galleryID)
-    }
-
-    fun invokeOnNotifyChanged() {
-        onNotifyChangedHandler?.invoke(download)
-    }
-
-    private fun initNotification() {
-        val intent = Intent(this, ReaderActivity::class.java).apply {
-            putExtra("galleryID", galleryID)
-        }
-        val pendingIntent = TaskStackBuilder.create(this).run {
-            addNextIntentWithParentStack(intent)
-            getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT)
-        }
-
-        notificationManager = NotificationManagerCompat.from(this)
-
-        notificationBuilder = NotificationCompat.Builder(this, "download").apply {
-            setContentTitle(getString(R.string.reader_loading))
-            setContentText(getString(R.string.reader_notification_text))
-            setSmallIcon(android.R.drawable.stat_sys_download)
-            setContentIntent(pendingIntent)
-            setProgress(0, 0, true)
-            priority = NotificationCompat.PRIORITY_LOW
-        }
-    }
-
-}

app/src/main/java/xyz/quaver/pupil/util/download/Cache.kt

@@ -0,0 +1,221 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.util.download
+
+import android.content.Context
+import android.content.ContextWrapper
+import android.util.Base64
+import android.util.Log
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.ImplicitReflectionSerializer
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.parse
+import kotlinx.serialization.stringify
+import xyz.quaver.Code
+import xyz.quaver.hitomi.GalleryBlock
+import xyz.quaver.hitomi.Reader
+import xyz.quaver.pupil.util.getCachedGallery
+import xyz.quaver.pupil.util.getDownloadDirectory
+import java.io.File
+import java.net.URL
+
+class Cache(context: Context) : ContextWrapper(context) {
+
+    private val preference = PreferenceManager.getDefaultSharedPreferences(this)
+
+    // Search in this order
+    // Download -> Cache
+    fun getCachedGallery(galleryID: Int) = getCachedGallery(this, galleryID).also {
+        if (!it.exists())
+            it.mkdirs()
+    }
+
+    @UseExperimental(ImplicitReflectionSerializer::class)
+    fun getCachedMetadata(galleryID: Int) : Metadata? {
+        val file = File(getCachedGallery(galleryID), ".metadata")
+
+        if (!file.exists())
+            return null
+
+        return try {
+            Json.parse(file.readText())
+        } catch (e: Exception) {
+            //File corrupted
+            file.delete()
+            null
+        }
+    }
+
+    @UseExperimental(ImplicitReflectionSerializer::class)
+    fun setCachedMetadata(galleryID: Int, metadata: Metadata) {
+        val file = File(getCachedGallery(galleryID), ".metadata").also {
+            if (!it.exists())
+                it.createNewFile()
+        }
+
+        file.writeText(Json.stringify(metadata))
+    }
+
+    suspend fun getThumbnail(galleryID: Int): String? {
+        val metadata = Cache(this).getCachedMetadata(galleryID)
+
+        val thumbnail = if (metadata?.thumbnail == null)
+            withContext(Dispatchers.IO) {
+                val thumbnails = getGalleryBlock(galleryID)?.thumbnails
+                try {
+                    Base64.encodeToString(URL(thumbnails?.firstOrNull()).readBytes(), Base64.DEFAULT)
+                } catch (e: Exception) {
+                    null
+                }
+            }
+        else
+            metadata.thumbnail
+
+        setCachedMetadata(
+            galleryID,
+            Metadata(Cache(this).getCachedMetadata(galleryID), thumbnail = thumbnail)
+        )
+
+        return thumbnail
+    }
+
+    suspend fun getGalleryBlock(galleryID: Int): GalleryBlock? {
+        val metadata = Cache(this).getCachedMetadata(galleryID)
+
+        val source = mapOf(
+            Code.HITOMI to { xyz.quaver.hitomi.getGalleryBlock(galleryID) },
+            Code.HIYOBI to { xyz.quaver.hiyobi.getGalleryBlock(galleryID) }
+        )
+
+        val galleryBlock = if (metadata?.galleryBlock == null)
+           source.entries.map {
+               CoroutineScope(Dispatchers.IO).async {
+                   kotlin.runCatching {
+                       it.value.invoke()
+                   }.getOrNull()
+               }
+           }.firstOrNull {
+               it.await() != null
+           }?.await()
+        else
+            metadata.galleryBlock
+
+        setCachedMetadata(
+            galleryID,
+            Metadata(Cache(this).getCachedMetadata(galleryID), galleryBlock = galleryBlock)
+        )
+
+        return galleryBlock
+    }
+
+    fun getReaderOrNull(galleryID: Int): Reader? {
+        return getCachedMetadata(galleryID)?.reader
+    }
+
+    suspend fun getReader(galleryID: Int): Reader? {
+        val metadata = getCachedMetadata(galleryID)
+        val mirrors = preference.getString("mirrors", null)?.split('>') ?: listOf()
+
+        val sources = mapOf(
+            Code.HITOMI to { xyz.quaver.hitomi.getReader(galleryID) },
+            Code.HIYOBI to { xyz.quaver.hiyobi.getReader(galleryID) }
+        ).let {
+            if (mirrors.isNotEmpty())
+                it.toSortedMap(
+                    Comparator { o1, o2 ->
+                        mirrors.indexOf(o1.name) - mirrors.indexOf(o2.name)
+                    }
+                )
+            else
+                it
+        }
+
+        val reader = if (metadata?.reader == null) {
+            CoroutineScope(Dispatchers.IO).async {
+                var retval: Reader? = null
+
+                for (source in sources) {
+                    retval = kotlin.runCatching {
+                        source.value.invoke()
+                    }.getOrNull()
+
+                    if (retval != null)
+                        break
+                }
+
+                retval
+            }.await()
+        } else
+            metadata.reader
+
+        if (reader != null)
+            setCachedMetadata(
+                galleryID,
+                Metadata(Cache(this).getCachedMetadata(galleryID), readers = reader)
+            )
+
+        return reader
+    }
+
+    fun getImages(galleryID: Int): List<File?>? {
+        val started = System.currentTimeMillis()
+        val gallery = getCachedGallery(galleryID)
+        val reader = getReaderOrNull(galleryID) ?: return null
+        val images = gallery.listFiles() ?: return null
+
+        Log.i("PUPILD", "${System.currentTimeMillis() - started} ms")
+        return reader.galleryInfo.indices.map { index ->
+            images.firstOrNull { file -> file.name.startsWith("%05d".format(index)) }
+        }
+    }
+
+    fun putImage(galleryID: Int, name: String, data: ByteArray) {
+        val cache = File(getCachedGallery(galleryID), name).also {
+            if (!it.exists())
+                it.createNewFile()
+        }
+
+        if (!Regex("""^[0-9]+.+$""").matches(name))
+            throw IllegalArgumentException("File name is not a number")
+
+        cache.writeBytes(data)
+    }
+
+    fun moveToDownload(galleryID: Int) {
+        val cache = getCachedGallery(galleryID).also {
+            if (!it.exists())
+                return
+        }
+        val download = File(getDownloadDirectory(this), galleryID.toString())
+
+        cache.copyRecursively(download, true)
+        cache.deleteRecursively()
+    }
+
+    fun isDownloading(galleryID: Int) = getCachedMetadata(galleryID)?.isDownloading == true
+
+    fun setDownloading(galleryID: Int, isDownloading: Boolean) {
+        setCachedMetadata(galleryID, Metadata(getCachedMetadata(galleryID), isDownloading = isDownloading))
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/util/download/DownloadWorker.kt

@@ -0,0 +1,393 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.util.download
+
+import android.app.PendingIntent
+import android.content.Context
+import android.content.ContextWrapper
+import android.content.Intent
+import android.content.SharedPreferences
+import android.util.SparseArray
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.app.TaskStackBuilder
+import androidx.preference.PreferenceManager
+import com.crashlytics.android.Crashlytics
+import io.fabric.sdk.android.Fabric
+import kotlinx.coroutines.*
+import okhttp3.*
+import okio.*
+import xyz.quaver.Code
+import xyz.quaver.hitomi.Reader
+import xyz.quaver.hitomi.getReferer
+import xyz.quaver.hitomi.urlFromUrlFromHash
+import xyz.quaver.hiyobi.cookie
+import xyz.quaver.hiyobi.createImgList
+import xyz.quaver.hiyobi.user_agent
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.ReaderActivity
+import java.io.IOException
+import java.util.concurrent.Executors
+import java.util.concurrent.LinkedBlockingQueue
+
+@UseExperimental(ExperimentalCoroutinesApi::class)
+class DownloadWorker private constructor(context: Context) : ContextWrapper(context) {
+
+    private val preferences : SharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
+
+    //region ProgressListener
+    @Suppress("UNCHECKED_CAST")
+    private val progressListener = object: ProgressListener {
+        override fun update(tag: Any?, bytesRead: Long, contentLength: Long, done: Boolean) {
+            val (galleryID, index) = (tag as? Pair<Int, Int>) ?: return
+
+            if (!done && progress[galleryID]?.get(index)?.isFinite() == true)
+                progress[galleryID]?.set(index, bytesRead * 100F / contentLength)
+        }
+    }
+
+    interface ProgressListener {
+        fun update(tag: Any?, bytesRead : Long, contentLength: Long, done: Boolean)
+    }
+
+    class ProgressResponseBody(
+        val tag: Any?,
+        val responseBody: ResponseBody,
+        val progressListener : ProgressListener
+    ) : ResponseBody() {
+        private var bufferedSource : BufferedSource? = null
+
+        override fun contentLength() = responseBody.contentLength()
+        override fun contentType() = responseBody.contentType() ?: null
+
+        override fun source(): BufferedSource {
+            if (bufferedSource == null)
+                bufferedSource = Okio.buffer(source(responseBody.source()))
+
+            return bufferedSource!!
+        }
+
+        private fun source(source: Source) = object: ForwardingSource(source) {
+
+            var totalBytesRead = 0L
+
+            override fun read(sink: Buffer, byteCount: Long): Long {
+                val bytesRead = super.read(sink, byteCount)
+
+                totalBytesRead += if (bytesRead == -1L) 0L else bytesRead
+                progressListener.update(tag, totalBytesRead, responseBody.contentLength(), bytesRead == -1L)
+
+                return bytesRead
+            }
+
+        }
+    }
+    //endregion
+
+    //region Singleton
+    companion object {
+
+        @Volatile private var instance: DownloadWorker? = null
+
+        fun getInstance(context: Context) =
+            instance ?: synchronized(this) {
+                instance ?: DownloadWorker(context).also { instance = it }
+            }
+    }
+    //endregion
+
+    val notificationManager = NotificationManagerCompat.from(context)
+
+    val queue = LinkedBlockingQueue<Int>()
+
+    /*
+    * KEY
+    *  primary galleryID
+    *  secondary index
+    * PRIMARY VALUE
+    *  MutableList -> Download in progress
+    *  null -> Loading / Gallery doesn't exist
+    * SECONDARY VALUE
+    *  0 <= value < 100 -> Download in progress
+    *  Float.POSITIVE_INFINITY -> Download completed
+    *  Float.NaN -> Exception
+    */
+    val progress = SparseArray<MutableList<Float>?>()
+    /*
+    * KEY
+    *  primary galleryID
+    *  secondary index
+    * PRIMARY VALUE
+    *  MutableList -> Download in progress / Loading
+    *  null -> Gallery doesn't exist
+    * SECONDARY VALUE
+    *  Throwable -> Exception
+    *  null -> Download in progress / Loading
+    */
+    val exception = SparseArray<MutableList<Throwable?>?>()
+    val notification = SparseArray<NotificationCompat.Builder>()
+
+    private val loop = loop()
+    private val worker = SparseArray<Job?>()
+    @Volatile var nRunners = 0
+
+    private val client = OkHttpClient.Builder()
+        .addInterceptor { chain ->
+            val request = chain.request()
+            var response = chain.proceed(request)
+
+            var retry = preferences.getInt("retry", 3)
+            while (!response.isSuccessful && retry > 0) {
+                response = chain.proceed(request)
+                retry--
+            }
+
+            response.newBuilder()
+                .body(ProgressResponseBody(request.tag(), response.body(), progressListener))
+                .build()
+        }
+        .dispatcher(Dispatcher(Executors.newFixedThreadPool(4)))
+        .build()
+
+    fun stop() {
+        queue.clear()
+
+        loop.cancel()
+        for (i in 0..worker.size()) {
+            val galleryID = worker.keyAt(i)
+
+            Cache(this@DownloadWorker).setDownloading(galleryID, false)
+            worker[galleryID]?.cancel()
+        }
+
+        client.dispatcher().cancelAll()
+
+        progress.clear()
+        exception.clear()
+        notification.clear()
+        notificationManager.cancelAll()
+
+        nRunners = 0
+
+    }
+
+    fun cancel(galleryID: Int) {
+        queue.remove(galleryID)
+        worker[galleryID]?.cancel()
+
+        client.dispatcher().queuedCalls()
+            .filter {
+                @Suppress("UNCHECKED_CAST")
+                (it.request().tag() as? Pair<Int, Int>)?.first == galleryID
+            }
+            .forEach {
+                it.cancel()
+            }
+
+        progress.remove(galleryID)
+        exception.remove(galleryID)
+        notification.remove(galleryID)
+        notificationManager.cancel(galleryID)
+
+        if (progress.indexOfKey(galleryID) >= 0) {
+            Cache(this@DownloadWorker).setDownloading(galleryID, false)
+            nRunners--
+        }
+    }
+
+    fun isCompleted(galleryID: Int) = progress[galleryID]?.all { !it.isFinite() } == true
+
+    private fun queueDownload(galleryID: Int, reader: Reader, index: Int, callback: Callback) {
+        val lowQuality = preferences.getBoolean("low_quality", false)
+
+        val request = Request.Builder().apply {
+            when (reader.code) {
+                Code.HITOMI -> {
+                    url(
+                        urlFromUrlFromHash(
+                            galleryID,
+                            reader.galleryInfo[index],
+                            if (lowQuality) "webp" else null
+                        )
+                    )
+                    addHeader("Referer", getReferer(galleryID))
+                }
+                Code.HIYOBI -> {
+                    url(createImgList(galleryID, reader, lowQuality)[index].path)
+                    addHeader("User-Agent", user_agent)
+                    addHeader("Cookie", cookie)
+                }
+                else -> {
+                    //shouldn't be called anyway
+                }
+            }
+            tag(galleryID to index)
+        }.build()
+
+        client.newCall(request).enqueue(callback)
+    }
+
+    private fun download(galleryID: Int) = CoroutineScope(Dispatchers.IO).launch {
+        val reader = Cache(this@DownloadWorker).getReader(galleryID)
+
+        //gallery doesn't exist
+        if (reader == null) {
+            progress.put(galleryID, null)
+            exception.put(galleryID, null)
+
+            Cache(this@DownloadWorker).setDownloading(galleryID, false)
+            nRunners--
+            return@launch
+        }
+
+        val cache = Cache(this@DownloadWorker).getImages(galleryID)
+
+        progress.put(galleryID, reader.galleryInfo.indices.map { index ->
+            if (cache?.get(index) != null)
+                Float.POSITIVE_INFINITY
+            else
+                0F
+        }.toMutableList())
+        exception.put(galleryID, reader.galleryInfo.map { null }.toMutableList())
+
+        if (notification[galleryID] == null)
+            initNotification(galleryID)
+
+        notification[galleryID].setContentTitle(reader.title)
+        notify(galleryID)
+
+        if (isCompleted(galleryID)) {
+            with(Cache(this@DownloadWorker)) {
+                if (isDownloading(galleryID)) {
+                    moveToDownload(galleryID)
+                    setDownloading(galleryID, false)
+                }
+            }
+            nRunners--
+
+            return@launch
+        }
+
+        for (i in reader.galleryInfo.indices) {
+            val callback = object : Callback {
+                override fun onFailure(call: Call, e: IOException) {
+                    if (Fabric.isInitialized())
+                        Crashlytics.logException(e)
+
+                    progress[galleryID]?.set(i, Float.NaN)
+                    exception[galleryID]?.set(i, e)
+
+                    notify(galleryID)
+
+                    if (isCompleted(galleryID)) {
+                        with(Cache(this@DownloadWorker)) {
+                            if (isDownloading(galleryID)) {
+                                moveToDownload(galleryID)
+                                setDownloading(galleryID, false)
+                            }
+                        }
+                        nRunners--
+                    }
+                }
+
+                override fun onResponse(call: Call, response: Response) {
+                    response.body().use {
+                        val res = it.bytes()
+                        val ext =
+                            call.request().url().encodedPath().split('.').last()
+
+                        Cache(this@DownloadWorker).putImage(galleryID, "%05d.%s".format(i, ext), res)
+                        progress[galleryID]?.set(i, Float.POSITIVE_INFINITY)
+                    }
+
+                    notify(galleryID)
+
+                    if (isCompleted(galleryID)) {
+                        with(Cache(this@DownloadWorker)) {
+                            if (isDownloading(galleryID)) {
+                                moveToDownload(galleryID)
+                                setDownloading(galleryID, false)
+                            }
+                        }
+                        nRunners--
+                    }
+                }
+            }
+
+            if (progress[galleryID]?.get(i)?.isFinite() == true)
+                queueDownload(galleryID, reader, i, callback)
+        }
+    }
+
+    private fun notify(galleryID: Int) {
+        val max = progress[galleryID]?.size ?: 0
+        val progress = progress[galleryID]?.count { !it.isFinite() } ?: 0
+
+        if (isCompleted(galleryID))
+            notification[galleryID]
+                ?.setContentText(getString(R.string.reader_notification_complete))
+                ?.setProgress(0, 0, false)
+        else
+            notification[galleryID]
+                ?.setProgress(max, progress, false)
+                ?.setContentText("$progress/$max")
+
+        if (Cache(this).isDownloading(galleryID) && notification[galleryID] != null)
+            notificationManager.notify(galleryID, notification[galleryID].build())
+        else
+            notificationManager.cancel(galleryID)
+    }
+
+    private fun initNotification(galleryID: Int) {
+        val intent = Intent(this, ReaderActivity::class.java).apply {
+            putExtra("galleryID", galleryID)
+        }
+        val pendingIntent = TaskStackBuilder.create(this).run {
+            addNextIntentWithParentStack(intent)
+            getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT)
+        }
+
+        notification.put(galleryID, NotificationCompat.Builder(this, "download").apply {
+            setContentTitle(getString(R.string.reader_loading))
+            setContentText(getString(R.string.reader_notification_text))
+            setSmallIcon(android.R.drawable.stat_sys_download)                                  // had to use this because old android doesn't support VectorDrawable on Notification :P
+            setContentIntent(pendingIntent)
+            setProgress(0, 0, true)
+        })
+    }
+
+    private fun loop() = CoroutineScope(Dispatchers.Default).launch {
+        while (true) {
+            if (queue.isEmpty() || nRunners > preferences.getInt("max_download", 4))
+                continue
+
+            val galleryID = queue.poll() ?: continue
+
+            if (progress.indexOfKey(galleryID) >= 0)    // Gallery already downloading!
+                continue
+
+            initNotification(galleryID)
+            if (Cache(this@DownloadWorker).isDownloading(galleryID))
+                notificationManager.notify(galleryID, notification[galleryID].build())
+            worker.put(galleryID, download(galleryID))
+            nRunners++
+        }
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/util/download/Metadata.kt

@@ -0,0 +1,44 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.util.download
+
+import kotlinx.serialization.Serializable
+import xyz.quaver.hitomi.GalleryBlock
+import xyz.quaver.hitomi.Reader
+
+@Serializable
+data class Metadata(
+    val thumbnail: String? = null,
+    val galleryBlock: GalleryBlock? = null,
+    val reader: Reader? = null,
+    val isDownloading: Boolean? = null
+) {
+    constructor(
+        metadata: Metadata?,
+        thumbnail: String? = null,
+        galleryBlock: GalleryBlock? = null,
+        readers: Reader? = null,
+        isDownloading: Boolean? = null
+    ) : this(
+        thumbnail ?: metadata?.thumbnail,
+        galleryBlock ?: metadata?.galleryBlock,
+        readers ?: metadata?.reader,
+        isDownloading ?: metadata?.isDownloading
+    )
+}

app/src/main/java/xyz/quaver/pupil/util/file.kt

@@ -18,24 +18,197 @@
 
 package xyz.quaver.pupil.util
 
+import android.annotation.TargetApi
 import android.content.Context
+import android.net.Uri
 import android.os.Build
-import android.os.Environment
+import android.os.storage.StorageManager
+import android.provider.DocumentsContract
+import androidx.core.content.ContextCompat
+import androidx.preference.PreferenceManager
 import java.io.File
+import java.io.FileOutputStream
+import java.lang.reflect.Array
+import java.net.URL
 
-fun getCachedGallery(context: Context, galleryID: Int): File {
-    return File(getDownloadDirectory(context), galleryID.toString()).let {
-        when {
-            it.exists() -> it
-            else -> File(context.cacheDir, "imageCache/$galleryID")
+
+fun getCachedGallery(context: Context, galleryID: Int) =
+    File(getDownloadDirectory(context), galleryID.toString()).let {
+        if (it.exists())
+            it
+        else
+            File(context.cacheDir, "imageCache/$galleryID")
+    }
+
+fun getDownloadDirectory(context: Context) =
+    PreferenceManager.getDefaultSharedPreferences(context).getString("dl_location", null).let {
+        if (it != null && !it.startsWith("content"))
+            File(it)
+        else
+            context.getExternalFilesDir(null)!!
+    }
+
+fun URL.download(to: File, onDownloadProgress: ((Long, Long) -> Unit)? = null) {
+
+    if (to.parentFile?.exists() == false)
+        to.parentFile!!.mkdirs()
+
+    if (!to.exists())
+        to.createNewFile()
+
+    FileOutputStream(to).use { out ->
+
+        with(openConnection()) {
+            val fileSize = contentLength.toLong()
+
+            getInputStream().use {
+
+                var bytesCopied: Long = 0
+                val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
+
+                var bytes = it.read(buffer)
+                while (bytes >= 0) {
+                    out.write(buffer, 0, bytes)
+                    bytesCopied += bytes
+                    onDownloadProgress?.invoke(bytesCopied, fileSize)
+                    bytes = it.read(buffer)
+                }
+
+            }
         }
+
     }
 }
 
-@Suppress("DEPRECATION")
-fun getDownloadDirectory(context: Context): File {
-    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
-        context.getExternalFilesDir("Pupil")!!
-    else
-        File(Environment.getExternalStorageDirectory(), "Pupil")
+fun getExtSdCardPaths(context: Context) =
+    ContextCompat.getExternalFilesDirs(context, null).drop(1).map {
+        it.absolutePath.substringBeforeLast("/Android/data").let {  path ->
+            runCatching {
+                File(path).canonicalPath
+            }.getOrElse {
+                path
+            }
+        }
+    }
+
+const val PRIMARY_VOLUME_NAME = "primary"
+fun getVolumePath(context: Context, volumeID: String?): String? {
+    return runCatching {
+        val storageManager = context.getSystemService(Context.STORAGE_SERVICE) as StorageManager
+        val storageVolumeClass = Class.forName("android.os.storage.StorageVolume")
+
+        val getVolumeList = storageVolumeClass.javaClass.getMethod("getVolumeList")
+        val getUUID = storageVolumeClass.getMethod("getUuid")
+        val getPath = storageVolumeClass.getMethod("getPath")
+        val isPrimary = storageVolumeClass.getMethod("isPrimary")
+
+        val result = getVolumeList.invoke(storageManager)!!
+
+        val length = Array.getLength(result)
+
+        for (i in 0 until length) {
+            val storageVolumeElement = Array.get(result, i)
+            val uuid = getUUID.invoke(storageVolumeElement) as? String
+            val primary = isPrimary.invoke(storageVolumeElement) as? Boolean
+
+            // primary volume?
+            if (primary == true && volumeID == PRIMARY_VOLUME_NAME)
+                return@runCatching getPath.invoke(storageVolumeElement) as? String
+
+            // other volumes?
+            if (volumeID == uuid) {
+                return@runCatching getPath.invoke(storageVolumeElement) as? String
+            }
+        }
+        return@runCatching null
+    }.getOrNull()
+}
+
+// Credits go to https://stackoverflow.com/questions/34927748/android-5-0-documentfile-from-tree-uri/36162691#36162691
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+fun getVolumeIdFromTreeUri(uri: Uri) =
+    DocumentsContract.getTreeDocumentId(uri).split(':').let {
+        if (it.isNotEmpty())
+            it[0]
+        else
+            null
+    }
+
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+fun getDocumentPathFromTreeUri(uri: Uri) =
+    DocumentsContract.getTreeDocumentId(uri).split(':').let {
+        if (it.size >= 2)
+            it[1]
+        else
+            File.separator
+    }
+
+fun getFullPathFromTreeUri(context: Context, uri: Uri) : String? {
+    val volumePath = getVolumePath(context, getVolumeIdFromTreeUri(uri) ?: return null).let {
+        it ?: return File.separator
+
+        if (it.endsWith(File.separator))
+            it.dropLast(1)
+        else
+            it
+    }
+
+    val documentPath = getDocumentPathFromTreeUri(uri).let {
+        if (it.endsWith(File.separator))
+            it.dropLast(1)
+        else
+            it
+    }
+
+    return if (documentPath.isNotEmpty()) {
+        if (documentPath.startsWith(File.separator))
+            volumePath + documentPath
+        else
+            volumePath + File.separator + documentPath
+    } else
+        volumePath
+}
+
+// Huge thanks to avluis(https://github.com/avluis)
+// This code is originated from Hentoid(https://github.com/avluis/Hentoid) under Apache-2.0 license.
+fun Uri.toFile(context: Context): File? {
+    val path = this.path ?: return null
+
+    val pathSeparator = path.indexOf(':')
+    val folderName = path.substring(pathSeparator+1)
+
+    // Determine whether the designated file is
+    // - on a removable media (e.g. SD card, OTG)
+    // or
+    // - on the internal phone memory
+    val removableMediaFolderRoots = getExtSdCardPaths(context)
+
+    /* First test is to compare root names with known roots of removable media
+     * In many cases, the SD card root name is shared between pre-SAF (File) and SAF (DocumentFile) frameworks
+     * (e.g. /storage/3437-3934 vs. /tree/3437-3934)
+     * This is what the following block is trying to do
+     */
+    for (s in removableMediaFolderRoots) {
+        val sRoot = s.substring(s.lastIndexOf(File.separatorChar))
+        val root = path.substring(0, pathSeparator).let {
+            it.substring(it.lastIndexOf(File.separatorChar))
+        }
+
+        if (sRoot.equals(root, true)) {
+            return File(s + File.separatorChar + folderName)
+        }
+    }
+    /* In some other cases, there is no common name (e.g. /storage/sdcard1 vs. /tree/3437-3934)
+     * We can use a slower method to translate the Uri obtained with SAF into a pre-SAF path
+     * and compare it to the known removable media volume names
+     */
+    val root = getFullPathFromTreeUri(context, this)
+
+    for (s in removableMediaFolderRoots) {
+        if (root?.startsWith(s) == true) {
+            return File(root)
+        }
+    }
+
+    return File(context.getExternalFilesDir(null)?.canonicalPath?.substringBeforeLast("/Android/data") ?: return null, folderName)
 }

app/src/main/java/xyz/quaver/pupil/util/misc.kt

@@ -18,23 +18,37 @@
 
 package xyz.quaver.pupil.util
 
-import android.content.Context
-import android.content.pm.PackageManager
-import android.os.Build
-import androidx.core.content.ContextCompat
+import android.annotation.SuppressLint
 import java.util.*
 import kotlin.collections.ArrayList
 
-//Android Q+ uses scoped storage thus not requiring permission
-fun Context.hasPermission(permission: String) =
-    Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q || ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED
-
 @UseExperimental(ExperimentalStdlibApi::class)
 fun String.wordCapitalize() : String {
     val result = ArrayList<String>()
 
+    @SuppressLint("DefaultLocale")
     for (word in this.split(" "))
-        result.add(word.capitalize(Locale.getDefault()))
+        result.add(word.capitalize(Locale.US))
 
     return result.joinToString(" ")
+}
+
+fun byteToString(byte: Long, precision : Int = 1) : String {
+
+    val suffix = listOf(
+        "B",
+        "kB",
+        "MB",
+        "GB",
+        "TB" //really?
+    )
+    var size = byte.toDouble(); var suffixIndex = 0
+
+    while (size >= 1024) {
+        size /= 1024
+        suffixIndex++
+    }
+
+    return "%.${precision}f ${suffix[suffixIndex]}".format(size)
+
 }

app/src/main/java/xyz/quaver/pupil/util/update.kt

@@ -18,15 +18,27 @@
 
 package xyz.quaver.pupil.util
 
+import android.app.PendingIntent
 import android.content.Context
-import kotlinx.serialization.InternalSerializationApi
-import kotlinx.serialization.internal.EnumSerializer
+import android.content.Intent
+import android.webkit.MimeTypeMap
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.content.FileProvider
+import androidx.lifecycle.Lifecycle
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import kotlinx.serialization.json.*
-import xyz.quaver.availableInHiyobi
-import xyz.quaver.hitomi.Reader
+import ru.noties.markwon.Markwon
 import xyz.quaver.pupil.BuildConfig
+import xyz.quaver.pupil.R
 import java.io.File
 import java.net.URL
+import java.util.*
 
 fun getReleases(url: String) : JsonArray {
     return try {
@@ -38,18 +50,17 @@ fun getReleases(url: String) : JsonArray {
     }
 }
 
-fun checkUpdate(url: String) : JsonObject? {
+fun checkUpdate(context: Context, url: String) : JsonObject? {
     val releases = getReleases(url)
 
     if (releases.isEmpty())
         return null
 
     return releases.firstOrNull {
-        if (BuildConfig.PRERELEASE) {
+        if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean("beta", false))
             true
-        } else {
+        else
             it.jsonObject["prerelease"]?.boolean == false
-        }
     }?.let {
         if (it.jsonObject["tag_name"]?.content == BuildConfig.VERSION_NAME)
             null
@@ -58,68 +69,136 @@ fun checkUpdate(url: String) : JsonObject? {
     }
 }
 
-fun getApkUrl(releases: JsonObject) : Pair<String?, String?>? {
+fun getApkUrl(releases: JsonObject) : String? {
     return releases["assets"]?.jsonArray?.firstOrNull {
         Regex("Pupil-v.+\\.apk").matches(it.jsonObject["name"]?.content ?: "")
     }.let {
-        if (it == null)
-            null
-        else
-            Pair(it.jsonObject["browser_download_url"]?.content, it.jsonObject["name"]?.content)
+        it?.jsonObject?.get("browser_download_url")?.content
     }
 }
 
-fun getOldReaderGalleries(context: Context) : List<File> {
-    val oldGallery = mutableListOf<File>()
+const val UPDATE_NOTIFICATION_ID = 384823
+fun checkUpdate(context: AppCompatActivity, force: Boolean = false) {
 
-    listOf(
-        getDownloadDirectory(context),
-        File(context.cacheDir, "imageCache")
-    ).forEach { root ->
-        root.listFiles()?.forEach { gallery ->
-            File(gallery, "reader.json").let { readerFile ->
-                if (!readerFile.exists())
-                    return@let
+    val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+    val ignoreUpdateUntil = preferences.getLong("ignore_update_until", 0)
 
-                try {
-                    Json(JsonConfiguration.Stable).parseJson(readerFile.readText())
-                        .jsonObject.let { reader ->
-                        if (!reader.contains("code"))
-                            oldGallery.add(gallery)
-                    }
-                } catch (e: Exception) {
-                    // do nothing
+    if (!force && ignoreUpdateUntil > System.currentTimeMillis())
+        return
+
+    fun extractReleaseNote(update: JsonObject, locale: Locale) : String {
+        val markdown = update["body"]!!.content
+
+        val target = when(locale.language) {
+            "ko" -> "한국어"
+            "ja" -> "日本語"
+            else -> "English"
+        }
+
+        val releaseNote = Regex("^# Release Note.+$")
+        val language = Regex("^## $target$")
+        val end = Regex("^#.+$")
+
+        var releaseNoteFlag = false
+        var languageFlag = false
+
+        val result = StringBuilder()
+
+        for(line in markdown.lines()) {
+            if (releaseNote.matches(line)) {
+                releaseNoteFlag = true
+                continue
+            }
+
+            if (releaseNoteFlag) {
+                if (language.matches(line)) {
+                    languageFlag = true
+                    continue
                 }
             }
+
+            if (languageFlag) {
+                if (end.matches(line))
+                    break
+
+                result.append(line+"\n")
+            }
         }
+
+        return context.getString(R.string.update_release_note, update["tag_name"]?.content, result.toString())
     }
 
-    return oldGallery
-}
+    CoroutineScope(Dispatchers.Default).launch {
+        val update =
+            checkUpdate(context, context.getString(R.string.release_url)) ?: return@launch
 
-@UseExperimental(InternalSerializationApi::class)
-fun updateOldReaderGalleries(context: Context) {
+        val url = getApkUrl(update) ?: return@launch
 
-    val json = Json(JsonConfiguration.Stable)
+        val dialog = AlertDialog.Builder(context).apply {
+            setTitle(R.string.update_title)
+            val msg = extractReleaseNote(update, Locale.getDefault())
+            setMessage(Markwon.create(context).toMarkdown(msg))
+            setPositiveButton(android.R.string.yes) { _, _ ->
 
-   getOldReaderGalleries(context).forEach { gallery ->
-       val reader = json.parseJson(File(gallery, "reader.json").apply {
-           if (!exists())
-               return@forEach
-       }.readText())
-           .jsonObject.toMutableMap()
+                val notificationManager = NotificationManagerCompat.from(context)
+                val builder = NotificationCompat.Builder(context, "download").apply {
+                    setContentTitle(context.getString(R.string.update_notification_description))
+                    setSmallIcon(android.R.drawable.stat_sys_download)
+                    priority = NotificationCompat.PRIORITY_LOW
+                }
 
-       val codeSerializer = EnumSerializer(Reader.Code::class)
+                CoroutineScope(Dispatchers.IO).launch io@{
+                    val target = File(getDownloadDirectory(context), "Pupil.apk")
 
-       reader["code"] = when {
-           (File(gallery, "images").list()?.
-               all { !it.endsWith("webp") } ?: return@forEach) &&
-                   availableInHiyobi(gallery.name.toIntOrNull() ?: return@forEach)
-                -> json.toJson(codeSerializer, Reader.Code.HIYOBI)
-           else -> json.toJson(codeSerializer, Reader.Code.HITOMI)
-       }
+                    try {
+                        URL(url).download(target) { progress, fileSize ->
+                            builder.setProgress(fileSize.toInt(), progress.toInt(), false)
+                            notificationManager.notify(UPDATE_NOTIFICATION_ID, builder.build())
+                        }
+                    } catch (e: Exception) {
+                        builder.apply {
+                            setContentText(context.getString(R.string.update_failed))
+                            setMessage(context.getString(R.string.update_failed_message))
+                            setSmallIcon(android.R.drawable.stat_sys_download_done)
+                        }
 
-       File(gallery, "reader.json").writeText(JsonObject(reader).toString())
-   }
+                        notificationManager.cancel(UPDATE_NOTIFICATION_ID)
+                        notificationManager.notify(UPDATE_NOTIFICATION_ID, builder.build())
 
+                        return@io
+                    }
+
+                    val install = Intent(Intent.ACTION_VIEW).apply {
+                        flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_GRANT_READ_URI_PERMISSION
+                        setDataAndType(FileProvider.getUriForFile(context, context.applicationContext.packageName + ".provider", target), MimeTypeMap.getSingleton().getMimeTypeFromExtension("apk"))
+                    }
+
+                    builder.apply {
+                        setContentIntent(PendingIntent.getActivity(context, 0, install, 0))
+                        setProgress(0, 0, false)
+                        setSmallIcon(android.R.drawable.stat_sys_download_done)
+                        setContentTitle(context.getString(R.string.update_download_completed))
+                        setContentText(context.getString(R.string.update_download_completed_description))
+                    }
+
+                    notificationManager.cancel(UPDATE_NOTIFICATION_ID)
+
+                    if (context.lifecycle.currentState.isAtLeast(Lifecycle.State.RESUMED))
+                        context.startActivity(install)
+                    else
+                        notificationManager.notify(UPDATE_NOTIFICATION_ID, builder.build())
+                }
+            }
+            setNegativeButton(if (force) android.R.string.no else R.string.ignore_update) { _, _ ->
+                if (!force)
+                    preferences.edit()
+                        .putLong("ignore_update_until", System.currentTimeMillis() + 604800000)
+                        .apply()
+            }
+        }
+
+        launch(Dispatchers.Main) {
+            dialog.show()
+        }
+    }
 }

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

@@ -1,4 +1,4 @@
-<vector android:height="24dp" android:tint="#fff"
+<vector android:height="24dp"
     android:viewportHeight="24.0" android:viewportWidth="24.0"
     android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
     <path android:fillColor="#fff" android:pathData="M19,9h-4V3H9v6H5l7,7 7,-7zM5,18v2h14v-2H5z"/>

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

@@ -0,0 +1,8 @@
+<!-- drawable/menu.xml -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#fff" android:pathData="M3,6H21V8H3V6M3,11H21V13H3V11M3,16H21V18H3V16Z" />
+</vector>

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

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     Pupil, Hitomi.la viewer for Android
+  ~     Copyright (C) 2020  tom5079
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:bottom="1dp"
+        android:left="1dp"
+        android:right="1dp"
+        android:top="1dp">
+        <shape android:shape="rectangle" >
+            <stroke
+                android:width="1dp"
+                android:color="#555555" />
+
+            <solid android:color="@color/transparent" />
+        </shape>
+    </item>
+</layer-list>

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

@@ -18,21 +18,12 @@
   -->
 
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:padding="16dp">
 
-    <TextView
-        android:id="@+id/default_query_dialog_title"
-        style="@style/TextAppearance.AppCompat.Large"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/default_query_dialog_title"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintStart_toStartOf="parent"/>
-
     <EditText
         tools:ignore="Autofill"
         android:inputType="text"
@@ -40,7 +31,7 @@
         android:id="@+id/default_query_dialog_edittext"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        app:layout_constraintTop_toBottomOf="@id/default_query_dialog_title"
+        app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"/>
 
@@ -116,14 +107,4 @@
 
     </LinearLayout>
 
-    <Button
-        android:id="@+id/default_query_dialog_ok"
-        style="?borderlessButtonStyle"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        app:layout_constraintTop_toBottomOf="@id/default_query_dialog_guro_layout"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        android:text="@android:string/ok"/>
-
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     Pupil, Hitomi.la viewer for Android
+  ~     Copyright (C) 2020  tom5079
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="16dp"/>

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

@@ -22,7 +22,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    tools:context=".ui.PatternLockFragment">
+    tools:context=".ui.fragment.PatternLockFragment">
 
     <com.andrognito.patternlockview.PatternLockView
         android:id="@+id/lock_pattern_view"

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

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     Pupil, Hitomi.la viewer for Android
+  ~     Copyright (C) 2020  tom5079
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal" android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:clickable="true"
+    android:focusable="true">
+
+    <RadioButton
+        android:id="@+id/button"
+        android:clickable="false"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_gravity="center_vertical">
+
+        <TextView
+            android:id="@+id/location_type"
+            style="@style/MaterialAlertDialog.MaterialComponents.Title.Text"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+
+        <TextView
+            android:id="@+id/location_available"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+
+    </LinearLayout>
+
+</LinearLayout>

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

@@ -35,6 +35,6 @@
         android:id="@+id/gallery_details_tags"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        app:chipSpacingVertical="8dp"/>
+        app:chipSpacingVertical="4dp"/>
 
 </LinearLayout>

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

@@ -177,7 +177,7 @@
 					android:layout_marginStart="8dp"
 					android:layout_marginTop="16dp"
 					android:layout_marginBottom="16dp"
-					app:chipSpacing="2dp"
+					app:chipSpacing="4dp"
 					app:layout_constraintTop_toBottomOf="@id/galleryblock_padding"
 					app:layout_constraintLeft_toRightOf="@id/galleryblock_thumbnail"
 					app:layout_constraintRight_toRightOf="parent"

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

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     Pupil, Hitomi.la viewer for Android
+  ~     Copyright (C) 2020  tom5079
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:paddingStart="32dp"
+    android:paddingLeft="32dp"
+    android:paddingEnd="32dp"
+    android:paddingRight="32dp"
+    android:paddingTop="16dp">
+
+    <TextView
+        android:id="@+id/mirror_name"
+        style="@style/TextAppearance.MaterialComponents.Headline6"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"/>
+
+    <ImageView
+        android:id="@+id/mirror_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:srcCompat="@drawable/menu"
+        app:tint="?attr/colorControlNormal"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -36,7 +36,7 @@
         android:layout_height="match_parent"
         android:layout_weight="1"
         app:srcCompat="@drawable/ic_navigate_next_black_24dp"
-        android:tint="@color/colorAccent"
+        app:tint="@color/colorAccent"
         android:rotation="180"/>
 
     <TextView

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

@@ -36,7 +36,7 @@
         android:layout_height="match_parent"
         android:layout_weight="1"
         app:srcCompat="@drawable/ic_navigate_next_black_24dp"
-        android:tint="@color/colorAccent"
+        app:tint="@color/colorAccent"
         android:rotation="180"/>
 
     <TextView

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

@@ -17,9 +17,55 @@
   ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
   -->
 
-<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:contentDescription="@string/reader_imageview_description"
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:minHeight="100dp"
-    android:paddingBottom="8dp"/>
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/container"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:background="@drawable/reader_item_boundary">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            android:gravity="center_horizontal"
+            android:orientation="vertical">
+
+            <ProgressBar
+                android:id="@+id/reader_item_progressbar"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                style="?android:progressBarStyleHorizontal"
+                android:indeterminate="false"
+                android:progress="0"
+                android:max="100"
+                android:visibility="visible"/>
+
+            <TextView
+                android:id="@+id/reader_index"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                style="@style/TextAppearance.AppCompat.Caption"/>
+
+        </LinearLayout>
+
+        <com.github.chrisbanes.photoview.PhotoView
+            android:id="@+id/image"
+            android:contentDescription="@string/reader_imageview_description"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:paddingBottom="8dp"/>
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -19,7 +19,6 @@
 
 <ImageView
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="@dimen/nav_header_height"
     android:background="@drawable/side_nav_bar"

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

@@ -25,11 +25,9 @@
         android:icon="@drawable/avd_star"
         app:showAsAction="always"/>
 
-    <item android:id="@+id/reader_menu_use_hiyobi"
+    <item android:id="@+id/reader_type"
         android:title=""
-        android:icon="@drawable/ic_hiyobi"
-        app:showAsAction="ifRoom"
-        android:visible="false"/>
+        app:showAsAction="ifRoom"/>
 
     <item android:id="@+id/reader_menu_page_indicator"
         android:title="@string/page_indicator_placeholder"

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

@@ -9,7 +9,7 @@
     <string name="search_hint_with_page">ギャラリー検索</string>
     <string name="settings_clear_cache">キャッシュクリア</string>
     <string name="settings_clear_cache_alert_message">キャッシュをクリアするとイメージのロード速度に影響を与えます。実行しますか？</string>
-    <string name="settings_clear_summary">サイズ: %1$d%2$s</string>
+    <string name="settings_clear_summary">サイズ: %s</string>
     <string name="settings_default_query">デフォルトキーワード</string>
     <string name="settings_galleries_per_page">一回にロードするギャラリー数</string>
     <string name="settings_search_title">検索設定</string>
@@ -18,7 +18,7 @@
     <string name="update_title">新しいアップデートがあります</string>
     <string name="warning">注意</string>
     <string name="settings_miscellaneous_title">その他</string>
-    <string name="settings_use_hiyobi_title">hiyobi.meからロード</string>
+    <string name="settings_mirror_title">ミラーサーバー</string>
     <string name="settings_clear_history">履歴を削除</string>
     <string name="settings_clear_history_alert_message">履歴を削除しますか？</string>
     <string name="settings_clear_history_summary">履歴数: %1$d</string>
@@ -61,15 +61,15 @@
     <string name="main_export_error">エクスポートエラーが発生しました</string>
     <string name="settings_clear_downloads">ダウンロード削除</string>
     <string name="settings_clear_downloads_alert_message">ダウンロードしたギャラリーを全て削除します。\n実行しますか？</string>
-    <string name="settings_use_hiyobi_summary">ロード速度を向上させるため可能であればhiyobi.meからイメージロード</string>
+    <string name="settings_mirror_summary">ミラーサーバからイメージをロード</string>
     <string name="main_drawer_favorite">お気に入り</string>
     <string name="main_open_gallery_by_id">ギャラリー番号で見る</string>
-    <string name="main_open_gallery_by_id_error">エラーが発生しました</string>
+    <string name="reader_failed_to_find_gallery">エラーが発生しました</string>
     <string name="settings_storage">ストレージ</string>
     <string name="main_drawer_grouop_contact_discord">ディスコード</string>
     <string name="settings_app_lock">アプリロック</string>
     <string name="settings_app_lock_type">アップロックの種類</string>
-    <string name="settings_app_version_title">バージョン</string>
+    <string name="settings_app_version_title">バージョン(アップデート確認)</string>
     <string name="settings_lock_biometrics">生体認識</string>
     <string name="settings_lock_confirm">ロック確認のためもう一回入力してください。</string>
     <string name="settings_lock_enabled">有効</string>
@@ -84,7 +84,7 @@
     <string name="main_menu_sort_newest">投稿日時順</string>
     <string name="main_menu_sort_popular">人気順</string>
     <string name="update_failed">アップデートに失敗しました</string>
-    <string name="update_failed_message">マニュアルインストールが必要です。APKファイルは</string>
+    <string name="update_failed_message">アップデート中エラーが発生しました</string>
     <string name="ignore_update">無視</string>
     <string name="lock_corrupted">ロックファイルが破損されています。Pupilを再再インストールしてください。</string>
     <string name="update_no_permission">権限がないため自動アップデートを行えません。ホームページで直接ダウンロードしてください。</string>
@@ -110,4 +110,16 @@
     <string name="settings_backup_checkout">確認</string>
     <string name="settings_restore_failed">復元に失敗しました</string>
     <string name="settings_restore_successful">%1$d項目を復元しました</string>
+    <string name="settings_dl_location">ダウンロード場所</string>
+    <string name="settings_dl_location_internal">内部ストレージ</string>
+    <string name="settings_dl_location_removable">外部SDカード</string>
+    <string name="settings_dl_location_available">%s 使用可能</string>
+    <string name="update_download_completed">ダウンロードが完了しました</string>
+    <string name="update_download_completed_description">ここをクリックしてアップデートを行えます</string>
+    <string name="settings_beta">ベータチャンネルでアップデートを受信</string>
+    <string name="settings_app_version_description">v%s</string>
+    <string name="settings_low_quality">低解像度イメージ</string>
+    <string name="settings_low_quality_summary">ロード速度とデータ使用料を改善するため低解像度イメージをロード</string>
+    <string name="settings_dl_location_custom">手動で設定</string>
+    <string name="settings_dl_location_not_writable">このフォルダにアクセスできません。他のフォルダを選択してください。</string>
 </resources>

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

@@ -8,7 +8,7 @@
     <string name="settings_default_query">기본 검색어</string>
     <string name="settings_clear_cache">캐시 정리하기</string>
     <string name="settings_clear_cache_alert_message">캐시를 정리하면 이미지 로딩속도가 느려질 수 있습니다. 계속하시겠습니까?</string>
-    <string name="settings_clear_summary">사용량: %1$d%2$s</string>
+    <string name="settings_clear_summary">사용량: %s</string>
     <string name="settings_galleries_per_page">한 번에 로드할 갤러리 수</string>
     <string name="settings_search_title">검색 설정</string>
     <string name="settings_title">설정</string>
@@ -18,7 +18,6 @@
     <string name="main_no_result">결과 없음</string>
     <string name="main_search">검색</string>
     <string name="settings_miscellaneous_title">기타</string>
-    <string name="settings_use_hiyobi_title">hiyobi.me 사용</string>
     <string name="settings_clear_history">기록 삭제</string>
     <string name="settings_clear_history_alert_message">기록을 삭제하시겠습니까?</string>
     <string name="settings_clear_history_summary">기록 %1$d개 저장됨</string>
@@ -61,15 +60,14 @@
     <string name="main_export_error">내보내기 오류가 발생했습니다</string>
     <string name="settings_clear_downloads">다운로드 삭제</string>
     <string name="settings_clear_downloads_alert_message">다운로드 된 만화를 모두 삭제합니다.\n계속하시겠습니까?</string>
-    <string name="settings_use_hiyobi_summary">속도 향상을 위해 가능하면 hiyobi.me에서 이미지 로드</string>
     <string name="main_drawer_favorite">즐겨찾기</string>
     <string name="main_open_gallery_by_id">갤러리 번호로 열기</string>
-    <string name="main_open_gallery_by_id_error">갤러리를 찾지 못했습니다</string>
+    <string name="reader_failed_to_find_gallery">갤러리를 찾지 못했습니다</string>
     <string name="settings_storage">저장 공간</string>
     <string name="main_drawer_grouop_contact_discord">디스코드</string>
     <string name="settings_app_lock">앱 잠금</string>
     <string name="settings_app_lock_type">앱 잠금 종류</string>
-    <string name="settings_app_version_title">앱 버전</string>
+    <string name="settings_app_version_title">앱 버전(업데이트 확인)</string>
     <string name="settings_lock_biometrics">생체 인식</string>
     <string name="settings_lock_confirm">잠금 확인을 위해 한번 더 입력해주세요</string>
     <string name="settings_lock_enabled">사용 중</string>
@@ -83,8 +81,8 @@
     <string name="main_menu_sort">정렬</string>
     <string name="main_menu_sort_popular">인기순</string>
     <string name="main_menu_sort_newest">시간순</string>
-    <string name="update_failed">"업데이트 "</string>
-    <string name="update_failed_message">수동 업데이트가 필요합니다. APK 파일은 다운로드 폴더에 있습니다.</string>
+    <string name="update_failed">"업데이트 에러</string>
+    <string name="update_failed_message">업데이트 중 에러가 발생했습니다</string>
     <string name="ignore_update">무시</string>
     <string name="lock_corrupted">잠금 파일이 손상되었습니다! 앱을 재설치 해 주시기 바랍니다.</string>
     <string name="update_no_permission">권한이 부여되어 있지 않아 자동 업데이트를 진행할 수 없습니다. 홈페이지에서 직접 다운로드 받으시기 바랍니다.</string>
@@ -110,4 +108,18 @@
     <string name="settings_backup_checkout">확인</string>
     <string name="settings_restore_failed">복원에 실패했습니다</string>
     <string name="settings_restore_successful">%1$d개 항목을 복원했습니다</string>
+    <string name="settings_dl_location">다운로드 위치</string>
+    <string name="settings_dl_location_internal">내부 저장공간</string>
+    <string name="settings_dl_location_removable">외부 SD카드</string>
+    <string name="settings_dl_location_available">%s 사용 가능</string>
+    <string name="update_download_completed">다운로드가 완료되었습니다</string>
+    <string name="update_download_completed_description">여기를 클릭해서 업데이트를 진행할 수 있습니다</string>
+    <string name="settings_beta">베타 채널에서 업데이트</string>
+    <string name="settings_app_version_description">v%s</string>
+    <string name="settings_low_quality">저해상도 이미지</string>
+    <string name="settings_low_quality_summary">로드 속도와 데이터 사용량을 줄이기 위해 저해상도 이미지를 로드</string>
+    <string name="settings_mirror_summary">미러 서버에서 이미지 로드</string>
+    <string name="settings_mirror_title">미러 설정</string>
+    <string name="settings_dl_location_custom">직접 설정</string>
+    <string name="settings_dl_location_not_writable">이 폴더에 접근할 수 없습니다. 다른 폴더를 선택해주세요.</string>
 </resources>

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

@@ -57,4 +57,9 @@
         <item>japanese|日本語</item>
     </string-array>
 
+    <string-array name="mirrors">
+        <item>HITOMI|hitomi.la</item>
+        <item>HIYOBI|hiyobi.me</item>
+    </string-array>
+
 </resources>

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

@@ -28,7 +28,7 @@
     <string name="https_block_alert">(Korean only)</string>
 
     <string name="update_failed">Update failed</string>
-    <string name="update_failed_message">Please install manually. APK file is in the Downloads folder.</string>
+    <string name="update_failed_message">Please install manually by visiting github release page :{ (or try again!)</string>
     <string name="update_no_permission">Cannot auto update because permission is denied. Please download manually from the webpage.</string>
     <string name="ignore_update">Ignore</string>
 
@@ -60,7 +60,7 @@
     <string name="main_jump_title">Jump to page</string>
     <string name="main_jump_message">Current page: %1$d\nMaximum page: %2$d</string>
     <string name="main_open_gallery_by_id">Open Gallery by ID</string>
-    <string name="main_open_gallery_by_id_error">Failed to open gallery</string>
+    <string name="reader_failed_to_find_gallery">Failed to open gallery</string>
 
     <string name="main_move">Move to page %1$d</string>
 
@@ -76,7 +76,9 @@
 
     <string name="update_title">Update available</string>
     <string name="update_download_started">Download started</string>
-    <string name="update_notification_description">Downloading apk&#8230;</string>
+    <string name="update_download_completed">Download Completed</string>
+    <string name="update_download_completed_description">Click here to update</string>
+    <string name="update_notification_description">Downloading update&#8230;</string>
     <string name="update_release_note"># Release Note(v%1$s)\n%2$s</string>
 
     <string name="search_hint">Search galleries</string>
@@ -96,6 +98,8 @@
     <string name="galleryblock_type">Type: %1$s</string>
     <string name="galleryblock_language">Language: %1$s</string>
 
+    <!-- READER -->
+
     <string name="reader_loading">Loading</string>
     <string name="reader_go_to_page">Go to page</string>
     <string name="reader_fab_fullscreen">Fullscreen</string>
@@ -107,25 +111,49 @@
 
     <string name="reader_help">Help</string>
 
+    <!-- SETTINGS -->
+
     <string name="settings_title">Settings</string>
-    <string name="settings_app_version_title">App version</string>
+
+    <string name="settings_app_version_title">App version(Click to check update)</string>
+    <string name="settings_app_version_description">v%s</string>
+    <string name="settings_beta">Update from beta channel</string>
+
+    <!-- SEARCH -->
+
     <string name="settings_search_title">Search Settings</string>
     <string name="settings_galleries_per_page">Galleries per page</string>
     <string name="settings_default_query">Default query</string>
+
+    <!-- SETTINGS/STORAGE -->
+
     <string name="settings_storage">Storage</string>
     <string name="settings_clear_cache">Clear cache</string>
     <string name="settings_clear_cache_alert_message">Deleting cache can affect image loading speed. Do you want to continue?</string>
-    <string name="settings_clear_summary">Currently using %1$d%2$s</string>
+    <string name="settings_clear_summary">Currently using %s</string>
     <string name="settings_clear_downloads">Clear downloads</string>
     <string name="settings_clear_downloads_alert_message">Delete all downloaded galleries.\nDo you want to continue?</string>
     <string name="settings_clear_history">Clear history</string>
     <string name="settings_clear_history_alert_message">Do you want to clear histories?</string>
     <string name="settings_clear_history_summary">%1$d histories saved</string>
+    <string name="settings_dl_location">Download directory</string>
+    <string name="settings_dl_location_removable">Removable Storage</string>
+    <string name="settings_dl_location_internal">Internal Storage</string>
+    <string name="settings_dl_location_available">%s available</string>
+    <string name="settings_dl_location_custom">Custom Location</string>
+    <string name="settings_dl_location_not_writable">This folder is not writable. Please select another folder.</string>
+    <string name="settings_low_quality">Low quality images</string>
+    <string name="settings_low_quality_summary">Load low quality images to improve load speed and data usage</string>
+
+    <!-- SETTINGS/APP LOCK -->
+
     <string name="settings_app_lock">App lock</string>
     <string name="settings_app_lock_type">App lock type</string>
+
+    <!-- SETTINGS/MISCELLANEOUS -->
+
     <string name="settings_miscellaneous_title">Miscellaneous</string>
-    <string name="settings_use_hiyobi_title">Use hiyobi.me</string>
-    <string name="settings_use_hiyobi_summary">Load images from hiyobi.me to improve loading speed (if available)</string>
+    <string name="settings_mirror_summary">Load images from mirrors</string>
     <string name="settings_security_mode_title">Enable security mode</string>
     <string name="settings_security_mode_summary">Enable security mode to make the screen invisible on recent app window</string>
     <string name="settings_dark_mode_title">Dark mode</string>
@@ -139,6 +167,8 @@
     <string name="settings_restore_failed">Restore failed</string>
     <string name="settings_restore_successful">%1$d entries restored</string>
 
+    <!-- SETTINGS/APP LOCK ACTIVITY -->
+
     <string name="settings_lock_none">None</string>
     <string name="settings_lock_pattern">Pattern</string>
     <string name="settings_lock_pin" translatable="false">PIN</string>
@@ -150,10 +180,13 @@
     <string name="settings_lock_remove_message">Do you want to remove lock?</string>
     <string name="settings_lock_wrong_confirm">Lock is different from last one. Please try again.</string>
 
+    <!-- SETTINGS/DEFAULT QUERY DIALOG -->
+
     <string name="default_query_dialog_title">Set default query</string>
     <string name="default_query_dialog_language">Language: </string>
     <string name="default_query_dialog_filter_BL">Filter BL</string>
     <string name="default_query_dialog_filter_guro">Filter Guro</string>
     <string name="default_query_dialog_language_selector_none">Any</string>
+    <string name="settings_mirror_title">Mirrors</string>
 
 </resources>

app/src/main/res/xml/file_paths.xml

@@ -17,6 +17,7 @@
   ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
   -->
 
-<paths xmlns:android="http://schemas.android.com/apk/res/android">
+<paths>
     <external-path name="external" path="/"/>
+    <external-files-path name="files" path="/"/>
 </paths>

app/src/main/res/xml/root_preferences.xml

@@ -3,8 +3,12 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <Preference
-        app:title="@string/settings_app_version_title"
-        app:key="app_version"/>
+        app:key="app_version"
+        app:title="@string/settings_app_version_title"/>
+
+    <SwitchPreferenceCompat
+        app:key="beta"
+        app:title="@string/settings_beta"/>
 
     <PreferenceCategory
         app:title="@string/settings_search_title">
@@ -28,16 +32,25 @@
         app:title="@string/settings_storage">
 
         <Preference
-            app:title="@string/settings_clear_cache"
-            app:key="delete_cache"/>
+            app:key="delete_cache"
+            app:title="@string/settings_clear_cache"/>
 
         <Preference
-            app:title="@string/settings_clear_downloads"
-            app:key="delete_downloads"/>
+            app:key="delete_downloads"
+            app:title="@string/settings_clear_downloads"/>
 
         <Preference
-            app:title="@string/settings_clear_history"
-            app:key="clear_history"/>
+            app:key="clear_history"
+            app:title="@string/settings_clear_history"/>
+
+        <Preference
+            app:key="dl_location"
+            app:title="@string/settings_dl_location"/>
+
+        <SwitchPreferenceCompat
+            app:key="dl_low_quality"
+            app:title="@string/settings_low_quality"
+            app:summary="@string/settings_low_quality_summary"/>
 
     </PreferenceCategory>
 
@@ -45,31 +58,31 @@
         app:title="@string/settings_app_lock">
 
         <Preference
-            app:title="@string/settings_app_lock_type"
-            app:key="app_lock"/>
+            app:key="app_lock"
+            app:title="@string/settings_app_lock_type"/>
 
     </PreferenceCategory>
 
     <PreferenceCategory
         app:title="@string/settings_miscellaneous_title">
 
-        <SwitchPreference
-            app:key="use_hiyobi"
-            app:title="@string/settings_use_hiyobi_title"
-            app:summary="@string/settings_use_hiyobi_summary"/>
+        <Preference
+            app:key="mirrors"
+            app:title="@string/settings_mirror_title"
+            app:summary="@string/settings_mirror_summary"/>
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             app:key="security_mode"
             app:title="@string/settings_security_mode_title"
             app:summary="@string/settings_security_mode_summary"
             app:defaultValue="true"/>
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             app:key="dark_mode"
             app:title="@string/settings_dark_mode_title"
             app:summary="@string/settings_dark_mode_summary"/>
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             app:key="nomedia"
             app:title="@string/settings_nomedia_title"
             app:summary="@string/settings_nomedia_title"/>

app/src/test/java/xyz/quaver/pupil/ExampleUnitTest.kt

@@ -16,7 +16,7 @@
  *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-@file:Suppress("UNUSED_VARIABLE")
+@file:Suppress("UNUSED_VARIABLE", "IncorrectScope")
 
 package xyz.quaver.pupil
 
@@ -26,13 +26,16 @@ package xyz.quaver.pupil
  * See [testing documentation](http://d.android.com/tools/testing).
  */
 
+import android.util.SparseArray
 import org.junit.Test
 
 class ExampleUnitTest {
 
     @Test
     fun test() {
+        val arr = SparseArray<Float>()
 
+        print(arr.indexOfKey(34))
     }
 
 }

build.gradle

@@ -15,7 +15,7 @@ buildscript {
         classpath 'com.google.gms:google-services:4.3.3'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
-        classpath 'io.fabric.tools:gradle:1.29.0'
+        classpath 'io.fabric.tools:gradle:1.31.0'
         classpath 'com.google.firebase:perf-plugin:1.3.1'
     }
 }
@@ -25,6 +25,7 @@ allprojects {
         google()
         jcenter()
         maven { url "https://jitpack.io" }
+        maven { url 'http://guardian.github.com/maven/repo-releases' }
     }
 }
 

gradle.properties

@@ -1,18 +1,17 @@
-# Project-wide Gradle settings.
-# IDE (e.g. Android Studio) users:
-# Gradle settings configured through the IDE *will override*
-# any settings specified in this file.
-# For more details on how to configure your build environment visit
+## For more details on how to configure your build environment visit
 # http://www.gradle.org/docs/current/userguide/build_environment.html
+#
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-org.gradle.jvmargs=-Xmx1536m
+# Default value: -Xmx1024m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+#
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
-# Kotlin code style for this project: "official" or "obsolete":
+#Thu Jan 30 12:29:48 KST 2020
 kotlin.code.style=official
-
+android.enableJetifier=true
+org.gradle.jvmargs=-Xmx1024M -Dkotlin.daemon.jvm.options\="-Xmx1024M"
 android.useAndroidX=true
-android.enableJetifier=true

libpupil/build.gradle

@@ -5,10 +5,10 @@ apply plugin: 'kotlinx-serialization'
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.2.1'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3'
     implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.14.0"
     implementation 'org.jsoup:jsoup:1.12.1'
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
 }
 
 sourceCompatibility = "7"

libpupil/src/main/java/xyz/quaver/Code.kt

@@ -0,0 +1,24 @@
+/*
+ *    Copyright 2020 tom5079
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+package xyz.quaver
+
+
+enum class Code {
+    HITOMI,
+    HIYOBI,
+    SORALA
+}

libpupil/src/main/java/xyz/quaver/hitomi/common.kt

@@ -17,20 +17,19 @@
 package xyz.quaver.hitomi
 
 import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
 import kotlinx.serialization.list
 import java.net.URL
 
 const val protocol = "https:"
 
-fun getGalleryInfo(galleryID: Int): List<GalleryInfo> {
-    return Json(JsonConfiguration.Stable).parse(
+@Suppress("EXPERIMENTAL_API_USAGE")
+fun getGalleryInfo(galleryID: Int) =
+    Json.nonstrict.parse(
         GalleryInfo.serializer().list,
         Regex("""\[.+]""").find(
             URL("$protocol//$domain/galleries/$galleryID.js").readText()
         )?.value ?: "[]"
     )
-}
 
 //common.js
 var adapose = false
@@ -54,17 +53,9 @@ fun subdomainFromURL(url: String, base: String? = null) : String {
     if (!base.isNullOrBlank())
         retval = base
 
-    val r = Regex("""/galleries/\d*(\d)/""")
-    var m = r.find(url)
-    var b = 10
-
-    if (m == null) {
-        b = 16
-        val r2 = Regex("""/[0-9a-f]/([0-9a-f]{2})/""")
-        m = r2.find(url)
-        if (m == null)
-            return retval
-    }
+    val b = 16
+    val r = Regex("""/[0-9a-f]/([0-9a-f]{2})/""")
+    val m = r.find(url) ?: return retval
 
     val g = m.groupValues[1].toIntOrNull(b) ?: return retval
 
@@ -84,15 +75,12 @@ fun fullPathFromHash(hash: String?) : String? {
     }
 }
 
-fun urlFromHash(galleryID: Int, image: GalleryInfo, webp: String? = null) : String {
-    val ext = webp ?: image.name.split('.').last()
-    return when {
-        image.hash.isNullOrBlank() ->
-            "$protocol//a.hitomi.la/galleries/$galleryID/${image.name}"
-        else ->
-            "$protocol//a.hitomi.la/${webp?:"images"}/${fullPathFromHash(image.hash)}.$ext"
-    }
+@Suppress("NAME_SHADOWING", "UNUSED_PARAMETER")
+fun urlFromHash(galleryID: Int, image: GalleryInfo, dir: String? = null, ext: String? = null) : String {
+    val ext = ext ?: dir ?: image.name.split('.').last()
+    val dir = dir ?: "images"
+    return "$protocol//a.hitomi.la/$dir/${fullPathFromHash(image.hash)}.$ext"
 }
 
-fun urlFromUrlFromHash(galleryID: Int, image: GalleryInfo, webp: String? = null) =
-    urlFromURL(urlFromHash(galleryID, image, webp))
+fun urlFromUrlFromHash(galleryID: Int, image: GalleryInfo, dir: String? = null, ext: String? = null, base: String? = null) =
+    urlFromURL(urlFromHash(galleryID, image, dir, ext), base)

libpupil/src/main/java/xyz/quaver/hitomi/galleries.kt

@@ -16,9 +16,11 @@
 
 package xyz.quaver.hitomi
 
+import kotlinx.serialization.Serializable
 import org.jsoup.Jsoup
 import java.net.URLDecoder
 
+@Serializable
 data class Gallery(
     val related: List<Int>,
     val langList: List<Pair<String, String>>,
@@ -68,8 +70,8 @@ fun getGallery(galleryID: Int) : Gallery {
         href.slice(5 until href.indexOf('-'))
     }
 
-    val thumbnails = getGalleryInfo(galleryID).map {
-        "$protocol//tn.hitomi.la/smalltn/$galleryID/${it.name}.jpg"
+    val thumbnails = getGalleryInfo(galleryID).map { galleryInfo ->
+        urlFromUrlFromHash(galleryID, galleryInfo, "smalltn", "jpg", "tn")
     }
 
     return Gallery(related, langList, cover, title, artists, groups, type, language, series, characters, tags, thumbnails)

libpupil/src/main/java/xyz/quaver/hitomi/galleryblock.kt

@@ -18,6 +18,7 @@ package xyz.quaver.hitomi
 
 import kotlinx.serialization.Serializable
 import org.jsoup.Jsoup
+import xyz.quaver.Code
 import java.net.URL
 import java.net.URLDecoder
 import java.nio.ByteBuffer
@@ -67,6 +68,7 @@ fun fetchNozomi(area: String? = null, tag: String = "index", language: String =
 
 @Serializable
 data class GalleryBlock(
+    val code: Code,
     val id: Int,
     val galleryUrl: String,
     val thumbnails: List<String>,
@@ -102,7 +104,7 @@ fun getGalleryBlock(galleryID: Int) : GalleryBlock? {
             href.slice(5 until href.indexOf("-all"))
         }
 
-        return GalleryBlock(galleryID, galleryUrl, thumbnails, title, artists, series, type, language, relatedTags)
+        return GalleryBlock(Code.HITOMI, galleryID, galleryUrl, thumbnails, title, artists, series, type, language, relatedTags)
     } catch (e: Exception) {
         return null
     }

libpupil/src/main/java/xyz/quaver/hitomi/reader.kt

@@ -18,9 +18,9 @@ package xyz.quaver.hitomi
 
 import kotlinx.serialization.Serializable
 import org.jsoup.Jsoup
+import xyz.quaver.Code
 
 fun getReferer(galleryID: Int) = "https://hitomi.la/reader/$galleryID.html"
-fun webpUrlFromUrl(url: String) = url.replace("/galleries/", "/webp/") + ".webp"
 
 @Serializable
 data class GalleryInfo(
@@ -32,13 +32,7 @@ data class GalleryInfo(
 )
 
 @Serializable
-data class Reader(val code: Code, val title: String, val galleryInfo: List<GalleryInfo>) {
-    enum class Code {
-        HITOMI,
-        HIYOBI,
-        SORALA
-    }
-}
+data class Reader(val code: Code, val title: String, val galleryInfo: List<GalleryInfo>)
 
 //Set header `Referer` to reader url to avoid 403 error
 fun getReader(galleryID: Int) : Reader {
@@ -46,5 +40,5 @@ fun getReader(galleryID: Int) : Reader {
 
     val doc = Jsoup.connect(readerUrl).get()
 
-   return Reader(Reader.Code.HITOMI, doc.title(), getGalleryInfo(galleryID))
+   return Reader(Code.HITOMI, doc.title(), getGalleryInfo(galleryID))
 }

libpupil/src/main/java/xyz/quaver/hitomi/results.kt

@@ -26,7 +26,7 @@ fun doSearch(query: String, sortByPopularity: Boolean = false) : List<Int> {
     val terms = query
         .trim()
         .replace(Regex("""^\?"""), "")
-        .toLowerCase()
+        .toLowerCase(Locale.US)
         .split(Regex("\\s+"))
         .map {
             it.replace('_', ' ')

libpupil/src/main/java/xyz/quaver/hiyobi/galleryblock.kt

@@ -0,0 +1,49 @@
+/*
+ *    Copyright 2020 tom5079
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+package xyz.quaver.hiyobi
+
+import org.jsoup.Jsoup
+import xyz.quaver.Code
+import xyz.quaver.hitomi.GalleryBlock
+import xyz.quaver.hitomi.protocol
+
+fun getGalleryBlock(galleryID: Int) : GalleryBlock? {
+    val url = "$protocol//$hiyobi/search/$galleryID"
+
+    try {
+        val doc = Jsoup.connect(url).get()
+
+        val galleryBlock = doc.selectFirst(".gallery-content")
+
+        val galleryUrl = galleryBlock.selectFirst("a").attr("href")
+
+        val thumbnails = listOf(galleryBlock.selectFirst("img").attr("abs:src"))
+
+        val title = galleryBlock.selectFirst("b").text()
+        val artists = galleryBlock.select("tr:matches(작가) a[href~=artist]").map { it.text() }
+        val series = galleryBlock.select("tr:matches(원작) a").map { it.attr("href").substringAfter("series:").replace('_', ' ') }
+        val type = galleryBlock.selectFirst("tr:matches(종류) a").attr("href").substringAfter("type:").replace('_', ' ')
+
+        val language = "korean"
+
+        val relatedTags = galleryBlock.select("tr:matches(태그) a").map { it.attr("href").substringAfterLast('/').replace('_', ' ') }
+
+        return GalleryBlock(Code.HIYOBI, galleryID, galleryUrl, thumbnails, title, artists, series, type, language, relatedTags)
+    } catch (e: Exception) {
+        return null
+    }
+}

libpupil/src/main/java/xyz/quaver/hiyobi/reader.kt

@@ -17,9 +17,9 @@
 package xyz.quaver.hiyobi
 
 import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
 import kotlinx.serialization.list
 import org.jsoup.Jsoup
+import xyz.quaver.Code
 import xyz.quaver.hitomi.GalleryInfo
 import xyz.quaver.hitomi.Reader
 import xyz.quaver.hitomi.protocol
@@ -64,7 +64,8 @@ fun getReader(galleryID: Int) : Reader {
 
     val title = Jsoup.connect(reader).get().title()
 
-    val galleryInfo = Json(JsonConfiguration.Stable).parse(
+    @Suppress("EXPERIMENTAL_API_USAGE")
+    val galleryInfo = Json.parse(
         GalleryInfo.serializer().list,
         with(URL(url).openConnection() as HttpsURLConnection) {
             setRequestProperty("User-Agent", user_agent)
@@ -76,8 +77,14 @@ fun getReader(galleryID: Int) : Reader {
         }
     )
 
-    return Reader(Reader.Code.HIYOBI, title, galleryInfo)
+    return Reader(Code.HIYOBI, title, galleryInfo)
 }
 
-fun createImgList(galleryID: Int, reader: Reader) =
-    reader.galleryInfo.map { Images("$protocol//$hiyobi/data/$galleryID/${it.name}", galleryID, it.name) }
+fun createImgList(galleryID: Int, reader: Reader, lowQuality: Boolean = false) =
+    if (lowQuality)
+        reader.galleryInfo.map {
+            val name = it.name.replace(Regex("/.[^/.]+$"), "") + ".jpg"
+            Images("$protocol//$hiyobi/data/$galleryID/$name.jpg", galleryID, it.name)
+        }
+    else
+        reader.galleryInfo.map { Images("$protocol//$hiyobi/data/$galleryID/${it.name}", galleryID, it.name) }

libpupil/src/test/java/xyz/quaver/hitomi/UnitTest.kt

@@ -68,21 +68,23 @@ class UnitTest {
 
     @Test
     fun test_getGallery() {
-        val gallery = getGallery(1510566)
+        val gallery = getGallery(1552751)
 
         print(gallery)
     }
 
     @Test
     fun test_getReader() {
-        val reader = getReader(1442740)
+        val reader = getReader(1567569)
 
         print(reader)
     }
 
     @Test
     fun test_hiyobi() {
-        xyz.quaver.hiyobi.getReader(1510567)
+        val reader = xyz.quaver.hiyobi.getReader(10000062)
+
+        print(reader)
     }
 
     @Test
@@ -100,4 +102,11 @@ class UnitTest {
 
         print(result)
     }
+
+    @Test
+    fun test_hiyobi_galleryBlock() {
+        val galleryBlock = xyz.quaver.hiyobi.getGalleryBlock(10000027)
+
+        print(galleryBlock)
+    }
 }