Merge remote-tracking branch 'origin/master' into master

Fixes concurrentmodificationexception

.gitignore

@@ -16,4 +16,5 @@
 /gh-pages
 
 #Private files
-/app/google-services.json
+**/google-services.json
+**/credentials.json

.idea/codeStyles/Project.xml

@@ -1,9 +1,23 @@
 <component name="ProjectCodeStyleConfiguration">
   <code_scheme name="Project" version="173">
-    <AndroidXmlCodeStyleSettings>
-      <option name="ARRANGEMENT_SETTINGS_MIGRATED_TO_191" value="true" />
-    </AndroidXmlCodeStyleSettings>
+    <option name="RIGHT_MARGIN" value="120" />
     <JetCodeStyleSettings>
+      <option name="PACKAGES_TO_USE_STAR_IMPORTS">
+        <value>
+          <package name="java.util" alias="false" withSubpackages="false" />
+          <package name="kotlinx.android.synthetic" alias="false" withSubpackages="true" />
+          <package name="io.ktor" alias="false" withSubpackages="true" />
+        </value>
+      </option>
+      <option name="PACKAGES_IMPORT_LAYOUT">
+        <value>
+          <package name="" alias="false" withSubpackages="true" />
+          <package name="java" alias="false" withSubpackages="true" />
+          <package name="javax" alias="false" withSubpackages="true" />
+          <package name="kotlin" alias="false" withSubpackages="true" />
+          <package name="" alias="true" withSubpackages="true" />
+        </value>
+      </option>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
     <codeStyleSettings language="XML">

.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="1.8" />
+  </component>
+</project>

.idea/copyright/Apache.xml

@@ -1,6 +0,0 @@
-<component name="CopyrightManager">
-  <copyright>
-    <option name="notice" value="   Copyright &amp;#36;today.year tom5079&#10;&#10;   Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);&#10;   you may not use this file except in compliance with the License.&#10;   You may obtain a copy of the License at&#10;&#10;     http://www.apache.org/licenses/LICENSE-2.0&#10;&#10;   Unless required by applicable law or agreed to in writing, software&#10;   distributed under the License is distributed on an &quot;AS IS&quot; BASIS,&#10;   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.&#10;   See the License for the specific language governing permissions and&#10;   limitations under the License." />
-    <option name="myName" value="Apache" />
-  </copyright>
-</component>

.idea/copyright/profiles_settings.xml

@@ -2,7 +2,6 @@
   <settings>
     <module2copyright>
       <element module="Pupil" copyright="GPL" />
-      <element module="libpupil" copyright="Apache" />
     </module2copyright>
   </settings>
 </component>

.idea/dictionaries/tom50.xml

@@ -0,0 +1,7 @@
+<component name="ProjectDictionaryState">
+  <dictionary name="tom50">
+    <words>
+      <w>hitomi</w>
+    </words>
+  </dictionary>
+</component>

.idea/gradle.xml

@@ -1,15 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
-            <option value="$PROJECT_DIR$/libpupil" />
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />

.idea/jarRepositories.xml

@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven2" />
+      <option name="name" value="maven2" />
+      <option name="url" value="http://guardian.github.com/maven/repo-releases" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven" />
+      <option name="name" value="maven" />
+      <option name="url" value="https://jitpack.io" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenRepo" />
+      <option name="name" value="MavenRepo" />
+      <option name="url" value="https://repo.maven.apache.org/maven2/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven2" />
+      <option name="name" value="maven2" />
+      <option name="url" value="https://guardian.github.com/maven/repo-releases" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven3" />
+      <option name="name" value="maven3" />
+      <option name="url" value="https://s3.amazonaws.com/fabric-artifacts-private/internal-snapshots" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven4" />
+      <option name="name" value="maven4" />
+      <option name="url" value="https://maven.fabric.io/public" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenLocal" />
+      <option name="name" value="MavenLocal" />
+      <option name="url" value="file:/$USER_HOME$/.m2/repository/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenLocal" />
+      <option name="name" value="MavenLocal" />
+      <option name="url" value="file:/$USER_HOME$/.m2/repository" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven3" />
+      <option name="name" value="maven3" />
+      <option name="url" value="https://dl.bintray.com/tom5079/maven" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven3" />
+      <option name="name" value="maven3" />
+      <option name="url" value="http://dl.bintray.com/piasy/maven" />
+    </remote-repository>
+  </component>
+</project>

.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>

.idea/misc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

.idea/scopes/libpupil.xml

@@ -1,3 +0,0 @@
-<component name="DependencyValidationManager">
-  <scope name="libpupil" pattern="file[libpupil]:*/" />
-</component>

README.md

@@ -1,16 +1,12 @@
-# Pupil
-
 ![Banner](https://github.com/tom5079/Pupil/blob/gh-pages/assets/images/pupil-banner.png?raw=true)
 *Pupil, Hitomi.la viewer for Android*  
 
-# Screenshot
-![Main Screen](https://github.com/tom5079/Pupil/blob/gh-pages/assets/images/main-screenshot.png?raw=true)
-*Main Screen*
+![](https://img.shields.io/github/downloads/tom5079/Pupil/total)  
+[![](https://img.shields.io/github/downloads/tom5079/Pupil/5.1.4/Pupil-v5.1.4.apk?color=%234fc3f7&label=DOWNLOAD%20APP&style=for-the-badge)](https://github.com/tom5079/Pupil/releases/download/5.1.4/Pupil-v5.1.4.apk)  
+[![](https://discordapp.com/api/guilds/610452916612104194/embed.png?style=banner2)](https://discord.gg/Stj4b5v)  
 
-![Reader Screen](https://github.com/tom5079/Pupil/blob/gh-pages/assets/images/reader-screenshot.png?raw=true)
-*Reader Screen*
-
-Images are censored to be SFW
+# Features
+![Main Screen](https://github.com/tom5079/Pupil/blob/gh-pages/assets/images/main-screenshot.jpg?raw=true)
 
 # Installation
 
@@ -25,3 +21,6 @@ or Build app yourself
 # Contribution
 
 Any kind of contribution is appriciated. Feel free to leave PR!
+
+## Tag Translation
+Head over to [tags branch](https://github.com/tom5079/Pupil/tree/tags)

app/build.gradle

@@ -1,82 +1,136 @@
-apply plugin: 'com.android.application'
-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'
+apply plugin: "com.android.application"
+apply plugin: "kotlin-android"
+apply plugin: "kotlin-kapt"
+apply plugin: "kotlin-android-extensions"
+apply plugin: "kotlinx-serialization"
+apply plugin: "com.google.android.gms.oss-licenses-plugin"
+
+if (file("google-services.json").exists() && file("src/debug/google-services.json").exists()) {
+    logger.lifecycle("Firebase Enabled")
+    apply plugin: "com.google.gms.google-services"
+    apply plugin: "com.google.firebase.crashlytics"
+    apply plugin: "com.google.firebase.firebase-perf"
+} else {
+    logger.lifecycle("Firebase Disabled")
+}
+
+ext {
+    okhttp_version = "3.12.12"
+}
+
+configurations {
+    all {
+        resolutionStrategy {
+            eachDependency { DependencyResolveDetails details ->
+                if (details.requested.group == "com.squareup.okhttp3" && details.requested.name == "okhttp") {
+                    // OkHttp drops support before 5.0 since 3.13.0
+                    details.useVersion okhttp_version
+                }
+            }
+        }
+    }
+}
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
     defaultConfig {
         applicationId "xyz.quaver.pupil"
         minSdkVersion 16
-        targetSdkVersion 29
-        versionCode 31
-        versionName "4.2-beta2-hotfix2"
+        targetSdkVersion 30
+        versionCode 63
+        versionName "5.1.4-hotfix1"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        multiDexEnabled true
         vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        debug {
+            minifyEnabled true
+            shrinkResources true
+
+            debuggable true
+            applicationIdSuffix ".debug"
+            versionNameSuffix "-DEBUG"
+
+            proguardFiles getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro"
+
+            ext.enableCrashlytics = false
+            ext.alwaysUpdateBuildId = false
         }
-        buildTypes.each {
-            it.buildConfigField('boolean', 'PRERELEASE', 'true')
-            it.buildConfigField('boolean', 'CENSOR', 'false')
+        release {
+            minifyEnabled true
+            shrinkResources true
+
+            proguardFiles getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro"
         }
     }
     kotlinOptions {
-        freeCompilerArgs += '-Xuse-experimental=kotlin.Experimental'
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+        freeCompilerArgs += "-Xuse-experimental=kotlin.Experimental"
     }
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    buildToolsVersion = "29.0.3"
 }
 
 dependencies {
-    def markwonVersion = "3.0.1"
+    implementation fileTree(dir: "libs", include: ["*.jar", "*.aar"])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.0.0-RC2"
     
-    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-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.legacy:legacy-support-v4:1.0.0'
+    implementation "androidx.appcompat:appcompat:1.2.0"
+    implementation "androidx.activity:activity-ktx:1.2.0-beta01"
+    implementation "androidx.fragment:fragment-ktx:1.3.0-beta01"
+    implementation "androidx.preference:preference:1.1.1"
+    implementation "androidx.constraintlayout:constraintlayout:2.0.2"
+    implementation "androidx.gridlayout:gridlayout:1.0.0"
     implementation "androidx.biometric:biometric:1.0.1"
-    implementation 'com.android.support:multidex:1.0.3'
+    implementation "androidx.work:work-runtime-ktx:2.4.0"
+
     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.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") {
-        transitive = false
-    }
-    implementation 'com.andrognito.patternlockview:patternlockview:1.0.0'
-    implementation "ru.noties.markwon:core:${markwonVersion}"
-    kapt 'com.github.bumptech.glide:compiler:4.9.0'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test:rules:1.2.0'
-    androidTestImplementation 'androidx.test:runner:1.2.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
-    implementation project(path: ':libpupil')
+
+    implementation "com.google.android.material:material:1.3.0-alpha03"
+
+    implementation "com.google.firebase:firebase-core:17.5.1"
+    implementation "com.google.firebase:firebase-analytics:17.6.0"
+    implementation "com.google.firebase:firebase-crashlytics:17.2.2"
+    implementation "com.google.firebase:firebase-perf:19.0.9"
+
+    implementation "com.google.android.gms:play-services-oss-licenses:17.0.0"
+    implementation "com.google.android.gms:play-services-mlkit-face-detection:16.1.1"
+
+    implementation "com.github.clans:fab:1.6.4"
+
+    //implementation "com.quiph.ui:recyclerviewfastscroller:0.2.1"
+
+    implementation 'com.github.piasy:BigImageViewer:1.6.7'
+    implementation 'com.github.piasy:FrescoImageLoader:1.6.7'
+    implementation 'com.github.piasy:FrescoImageViewFactory:1.6.7'
+
+    //noinspection GradleDependency
+    implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
+
+    implementation "com.tbuonomo.andrui:viewpagerdotsindicator:4.1.2"
+
+    implementation "net.rdrei.android.dirchooser:library:3.2@aar"
+    implementation "com.gu:option:1.3"
+
+    implementation "com.andrognito.patternlockview:patternlockview:1.0.0"
+    //implementation "com.andrognito.pinlockview:pinlockview:2.1.0"
+
+    implementation "ru.noties.markwon:core:3.1.0"
+
+    implementation "xyz.quaver:libpupil:1.7.2"
+    implementation "xyz.quaver:documentfilex:0.3.1"
+    implementation "xyz.quaver:floatingsearchview:1.0.7"
+
+    testImplementation "junit:junit:4.13"
+    androidTestImplementation "androidx.test.ext:junit:1.1.2"
+    androidTestImplementation "androidx.test:rules:1.3.0"
+    androidTestImplementation "androidx.test:runner:1.3.0"
+    androidTestImplementation "androidx.test.espresso:espresso-core:3.3.0"
 }
 
 androidExtensions {

app/proguard-rules.pro

@@ -19,3 +19,17 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+-dontobfuscate
+
+-keepattributes *Annotation*, InnerClasses
+-dontnote kotlinx.serialization.SerializationKt
+-keep,includedescriptorclasses class xyz.quaver.**$$serializer { *; } # <-- change package name to your app's
+-keepclassmembers class xyz.quaver.pupil.** { # <-- change package name to your app's
+    *** Companion;
+}
+-keepclasseswithmembers class xyz.quaver.pupil.** { # <-- change package name to your app's
+    kotlinx.serialization.KSerializer serializer(...);
+}
+-keep class xyz.quaver.pupil.ui.fragment.ManageFavoritesFragment
+-keep class xyz.quaver.pupil.ui.fragment.ManageStorageFragment

app/release/output-metadata.json

@@ -0,0 +1,20 @@
+{
+  "version": 1,
+  "artifactType": {
+    "type": "APK",
+    "kind": "Directory"
+  },
+  "applicationId": "xyz.quaver.pupil",
+  "variantName": "release",
+  "elements": [
+    {
+      "type": "SINGLE",
+      "filters": [],
+      "properties": [],
+      "versionCode": 63,
+      "versionName": "5.1.4-hotfix1",
+      "enabled": true,
+      "outputFile": "app-release.apk"
+    }
+  ]
+}

app/release/output.json

@@ -1 +0,0 @@
-[{"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":{}}]

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

@@ -20,28 +20,10 @@
 
 package xyz.quaver.pupil
 
-import android.content.Intent
-import android.util.Log
 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 org.junit.Test
 import org.junit.runner.RunWith
-import xyz.quaver.hiyobi.cookie
-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 java.net.URL
-import javax.net.ssl.HttpsURLConnection
 
 /**
  * Instrumented test, which will execute on an Android device.
@@ -55,65 +37,5 @@ 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
-    fun checkCacheDir() {
-        val activityTestRule = ActivityTestRule(LockActivity::class.java)
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-
-        activityTestRule.launchActivity(Intent())
-    }
-
-    @Test
-    fun test_doSearch() {
-        val reader = getReader( 1426382)
-
-        val data: ByteArray
-
-        with(URL(createImgList(1426382, reader)[0].path).openConnection() as HttpsURLConnection) {
-            setRequestProperty("User-Agent", user_agent)
-            setRequestProperty("Cookie", cookie)
-
-            data = inputStream.readBytes()
-        }
-
-        Log.d("Pupil", data.size.toString())
-    }
-
-    @UseExperimental(ImplicitReflectionSerializer::class)
-    @Test
-    fun test_deleteCodeFromReader() {
-        val context = InstrumentationRegistry.getInstrumentation().targetContext
-
-        val json = Json(JsonConfiguration.Stable)
-
-        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()
-
-                Log.d("PUPILD", gallery.name)
-
-                reader.remove("code")
-
-                File(gallery, "reader.json").writeText(JsonObject(reader).toString())
-            }
-        }
-    }
-
-    @Test
-    fun test_updateOldReader() {
-        val context = InstrumentationRegistry.getInstrumentation().targetContext
-
-        updateOldReaderGalleries(context)
     }
 }

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

@@ -0,0 +1,22 @@
+<?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/>.
+  -->
+
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string name="app_name" translatable="false" tools:override="true">Pupil-Debug</string>
+</resources>

app/src/main/AndroidManifest.xml

@@ -4,10 +4,15 @@
     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.READ_EXTERNAL_STORAGE" android:maxSdkVersion="21"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="21" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.CAMERA" />
+
+    <uses-feature android:name="android.hardware.camera" android:required="false" />
+    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false" />
 
     <application
         android:name=".Pupil"
@@ -18,21 +23,38 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
-        tools:replace="android:theme">
+        android:networkSecurityConfig="@xml/network_security_config"
+        tools:replace="android:theme"
+        tools:ignore="UnusedAttribute">
+
+        <meta-data
+            android:name="com.google.mlkit.vision.DEPENDENCIES"
+            android:value="face" />
 
         <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"/>
+        <service android:name=".services.DownloadService"
+            android:exported="false"/>
+
+        <receiver
+            android:name=".receiver.UpdateBroadcastReceiver"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
+            </intent-filter>
+        </receiver>
+
+        <activity android:name=".ui.LockActivity" />
         <activity
             android:name=".ui.ReaderActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
@@ -46,7 +68,7 @@
                 <data
                     android:host="hitomi.la"
                     android:pathPrefix="/galleries"
-                    android:scheme="https" />
+                    android:scheme="http" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -55,31 +77,42 @@
                 <category android:name="android.intent.category.BROWSABLE" />
 
                 <data
-                    android:host="히요비.asia"
+                    android:host="hitomi.la"
+                    android:pathPrefix="/manga"
+                    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="hitomi.la"
+                    android:pathPrefix="/doujinshi"
+                    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="hitomi.la"
+                    android:pathPrefix="/cg"
+                    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="hitomi.la"
                     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: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="e-hentai.org"
-                    android:pathPrefix="/g"
-                    android:scheme="https" />
+                    android:scheme="http" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -90,7 +123,7 @@
                 <data
                     android:host="hitomi.la"
                     android:pathPrefix="/galleries"
-                    android:scheme="http" />
+                    android:scheme="https" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -99,9 +132,9 @@
                 <category android:name="android.intent.category.BROWSABLE" />
 
                 <data
-                    android:host="히요비.asia"
-                    android:pathPrefix="/reader"
-                    android:scheme="http" />
+                    android:host="hitomi.la"
+                    android:pathPrefix="/manga"
+                    android:scheme="https" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -110,9 +143,53 @@
                 <category android:name="android.intent.category.BROWSABLE" />
 
                 <data
-                    android:host="xn--9w3b15m8vo.asia"
+                    android:host="hitomi.la"
+                    android:pathPrefix="/doujinshi"
+                    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="hitomi.la"
+                    android:pathPrefix="/cg"
+                    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="hitomi.la"
                     android:pathPrefix="/reader"
-                    android:scheme="http" />
+                    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="hiyobi.me"
+                    android:scheme="http"
+                    android:pathPrefix="/reader" />
+            </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="hiyobi.me"
+                    android:pathPrefix="/reader"
+                    android:scheme="https" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -125,10 +202,23 @@
                     android:pathPrefix="/g"
                     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="e-hentai.org"
+                    android:pathPrefix="/g"
+                    android:scheme="https" />
+            </intent-filter>
         </activity>
         <activity
             android:name=".ui.SettingsActivity"
-            android:label="@string/settings_title" />
+            android:label="@string/settings_title">
+            <tools:validation testUrl="http://ix.io/eer" />
+        </activity>
         <activity
             android:name=".ui.MainActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
@@ -139,7 +229,19 @@
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </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:scheme="http"
+                    android:host="ix.io"
+                    android:pathPattern="/..*" />
+            </intent-filter>
         </activity>
+        <activity android:name="net.rdrei.android.dirchooser.DirectoryChooserActivity" />
     </application>
 
 </manifest>

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

@@ -18,41 +18,112 @@
 
 package xyz.quaver.pupil
 
-import android.app.Notification
-import android.app.NotificationChannel
-import android.app.NotificationManager
+import android.app.*
 import android.content.Context
+import android.content.Intent
+import android.net.Uri
 import android.os.Build
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.content.ContextCompat
-import androidx.multidex.MultiDexApplication
 import androidx.preference.PreferenceManager
+import com.github.piasy.biv.BigImageViewer
+import com.github.piasy.biv.loader.fresco.FrescoImageLoader
 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 com.google.firebase.analytics.FirebaseAnalytics
+import com.google.firebase.crashlytics.FirebaseCrashlytics
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import okhttp3.Response
+import xyz.quaver.io.FileX
+import xyz.quaver.pupil.types.Tag
+import xyz.quaver.pupil.util.*
+import xyz.quaver.pupil.util.downloader.DownloadManager
+import xyz.quaver.setClient
 import java.io.File
+import java.util.*
+import java.util.concurrent.TimeUnit
+import kotlin.reflect.KClass
 
-class Pupil : MultiDexApplication() {
+typealias PupilInterceptor = (Interceptor.Chain) -> Response
 
-    lateinit var histories: Histories
-    lateinit var downloads: Histories
-    lateinit var favorites: Histories
+lateinit var histories: SavedSet<Int>
+    private set
+lateinit var favorites: SavedSet<Int>
+    private set
+lateinit var favoriteTags: SavedSet<Tag>
+    private set
+lateinit var searchHistory: SavedSet<String>
+    private set
 
-    init {
-        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true)
+val interceptors = mutableMapOf<KClass<out Any>, PupilInterceptor>()
+
+lateinit var clientBuilder: OkHttpClient.Builder
+
+var clientHolder: OkHttpClient? = null
+val client: OkHttpClient
+    get() = clientHolder ?: clientBuilder.build().also {
+        clientHolder = it
+        setClient(it)
     }
 
-    override fun onCreate() {
-        val preference = PreferenceManager.getDefaultSharedPreferences(this)
+class Pupil : Application() {
 
-        histories = Histories(File(ContextCompat.getDataDir(this), "histories.json"))
-        downloads = Histories(File(ContextCompat.getDataDir(this), "downloads.json"))
-        favorites = Histories(File(ContextCompat.getDataDir(this), "favorites.json"))
+    override fun onCreate() {
+        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true)
+
+        preferences = PreferenceManager.getDefaultSharedPreferences(this)
+
+        val userID = Preferences["user_id", ""].let {  userID ->
+            if (userID.isEmpty()) UUID.randomUUID().toString().also { Preferences["user_id"] = it }
+            else userID
+        }
+
+        FirebaseCrashlytics.getInstance().setUserId(userID)
+
+        val proxyInfo = getProxyInfo()
+
+        clientBuilder = OkHttpClient.Builder()
+            .connectTimeout(0, TimeUnit.SECONDS)
+            .readTimeout(0, TimeUnit.SECONDS)
+            .proxyInfo(proxyInfo)
+            .addInterceptor { chain ->
+                val request = chain.request()
+                val tag = request.tag() ?: return@addInterceptor chain.proceed(request)
+
+                interceptors[tag::class]?.invoke(chain) ?: chain.proceed(request)
+            }
+
+        try {
+            Preferences.get<String>("download_folder").also {
+                if (it.startsWith("content") && Build.VERSION.SDK_INT > 19)
+                    contentResolver.takePersistableUriPermission(
+                        Uri.parse(it),
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                    )
+
+                if (!FileX(this, it).canWrite())
+                    throw Exception()
+
+                DownloadManager.getInstance(this).migrate()
+            }
+        } catch (e: Exception) {
+            Preferences.remove("download_folder")
+        }
+
+        if (!Preferences["reset_secure", false]) {
+            Preferences["security_mode"] = false
+            Preferences["reset_secure"] = true
+        }
+
+        histories = SavedSet(File(ContextCompat.getDataDir(this), "histories.json"), 0)
+        favorites = SavedSet(File(ContextCompat.getDataDir(this), "favorites.json"), 0)
+        favoriteTags = SavedSet(File(ContextCompat.getDataDir(this), "favorites_tags.json"), Tag.parse(""))
+        searchHistory = SavedSet(File(ContextCompat.getDataDir(this), "search_histories.json"), "")
+
+        if (BuildConfig.DEBUG)
+            FirebaseAnalytics.getInstance(this).setAnalyticsCollectionEnabled(false)
 
         try {
             ProviderInstaller.installIfNeeded(this)
@@ -62,30 +133,45 @@ 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)
-            }
+        BigImageViewer.initialize(FrescoImageLoader.with(this))
 
-            preference.edit().putBoolean("channel_created", true).apply()
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+
+            manager.createNotificationChannel(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(NotificationChannel("downloader", getString(R.string.channel_downloader), NotificationManager.IMPORTANCE_LOW).apply {
+                description = getString(R.string.channel_downloader_description)
+                enableLights(false)
+                enableVibration(false)
+                lockscreenVisibility = Notification.VISIBILITY_SECRET
+            })
+
+            manager.createNotificationChannel(NotificationChannel("update", getString(R.string.channel_update), NotificationManager.IMPORTANCE_HIGH).apply {
+                description = getString(R.string.channel_update_description)
+                enableLights(true)
+                enableVibration(true)
+                lockscreenVisibility = Notification.VISIBILITY_SECRET
+            })
+
+            manager.createNotificationChannel(NotificationChannel("import", getString(R.string.channel_update), NotificationManager.IMPORTANCE_LOW).apply {
+                description = getString(R.string.channel_update_description)
+                enableLights(false)
+                enableVibration(false)
+                lockscreenVisibility = Notification.VISIBILITY_SECRET
+            })
         }
 
-        AppCompatDelegate.setDefaultNightMode(when (preference.getBoolean("dark_mode", false)) {
+        AppCompatDelegate.setDefaultNightMode(when (Preferences.get<Boolean>("dark_mode")) {
             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

@@ -18,6 +18,7 @@
 
 package xyz.quaver.pupil.adapters
 
+import android.content.Context
 import android.graphics.drawable.Drawable
 import android.util.SparseBooleanArray
 import android.view.LayoutInflater
@@ -29,36 +30,26 @@ import androidx.core.content.ContextCompat
 import androidx.recyclerview.widget.RecyclerView
 import androidx.vectordrawable.graphics.drawable.Animatable2Compat
 import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat
-import com.bumptech.glide.RequestManager
-import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.daimajia.swipe.SwipeLayout
 import com.daimajia.swipe.adapters.RecyclerSwipeAdapter
 import com.daimajia.swipe.interfaces.SwipeAdapterInterface
-import com.google.android.material.chip.Chip
+import com.github.piasy.biv.loader.ImageLoader
 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 kotlinx.coroutines.*
+import xyz.quaver.hitomi.getGallery
+import xyz.quaver.hitomi.getReader
+import xyz.quaver.io.util.getChild
 import xyz.quaver.pupil.R
+import xyz.quaver.pupil.favoriteTags
+import xyz.quaver.pupil.favorites
 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.Preferences
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.downloader.DownloadManager
 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(private val galleries: List<Int>) : RecyclerSwipeAdapter<RecyclerView.ViewHolder>(), SwipeAdapterInterface {
 
     enum class ViewType {
         NEXT,
@@ -66,10 +57,83 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
         PREV
     }
 
-    private lateinit var favorites: Histories
+    var updateAll = true
+    var thin: Boolean = Preferences["thin"]
 
     inner class GalleryViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
-        fun bind(item: Pair<GalleryBlock, Deferred<String>>) {
+        private var galleryID: Int = 0
+
+        init {
+            CoroutineScope(Dispatchers.Main).launch {
+                while (updateAll) {
+                    updateProgress(view.context)
+                    delay(1000)
+                }
+            }
+        }
+
+        private fun updateProgress(context: Context) {
+            val cache = Cache.getInstance(context, galleryID)
+
+            CoroutineScope(Dispatchers.Main).launch {
+                if (cache.metadata.reader == null) {
+                    view.galleryblock_progressbar_layout.visibility = View.GONE
+                    view.galleryblock_progress_complete.visibility = View.INVISIBLE
+                    return@launch
+                }
+
+                with(view.galleryblock_progressbar) {
+                    val imageList = cache.metadata.imageList!!
+
+                    progress = imageList.count { it != null }
+                    max = imageList.size
+
+                    with(view.galleryblock_progressbar_layout) {
+                        if (visibility == View.GONE)
+                            visibility = View.VISIBLE
+                    }
+
+                    if (!imageList.contains(null)) {
+                        val downloadManager = DownloadManager.getInstance(context)
+
+                        if (completeFlag.get(galleryID, false)) {
+                            with(view.galleryblock_progress_complete) {
+                                setImageResource(
+                                    if (downloadManager.getDownloadFolder(galleryID) != null)
+                                        R.drawable.ic_progressbar
+                                    else R.drawable.ic_progressbar_cache
+                                )
+                                visibility = View.VISIBLE
+                            }
+                        } else {
+                            with(view.galleryblock_progress_complete) {
+                                setImageDrawable(AnimatedVectorDrawableCompat.create(context,
+                                    if (downloadManager.getDownloadFolder(galleryID) != null)
+                                        R.drawable.ic_progressbar_complete
+                                    else R.drawable.ic_progressbar_complete_cache
+                                ).apply {
+                                    this?.start()
+                                })
+                                visibility = View.VISIBLE
+                            }
+                            completeFlag.put(galleryID, true)
+                        }
+                    } else
+                        view.galleryblock_progress_complete.visibility = View.INVISIBLE
+                }
+            }
+        }
+
+        fun bind(galleryID: Int) {
+            this.galleryID = galleryID
+            updateProgress(view.context)
+
+            val cache = Cache.getInstance(view.context, galleryID)
+
+            val galleryBlock = runBlocking {
+                cache.getGalleryBlock()
+            } ?: return
+
             with(view) {
                 val resources = context.resources
                 val languages = resources.getStringArray(R.array.languages).map {
@@ -78,103 +142,64 @@ 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
 
-                CoroutineScope(Dispatchers.Main).launch {
-                    val cache = thumbnail.await()
-
-                    glide
-                        .load(cache)
-                        .skipMemoryCache(true)
-                        .diskCacheStrategy(DiskCacheStrategy.NONE)
-                        .error(R.drawable.image_broken_variant)
-                        .apply {
-                            if (BuildConfig.CENSOR)
-                                override(5, 8)
-                        }
-                        .into(galleryblock_thumbnail)
-                }
-
-                //Check cache
-                val readerCache = { File(getCachedGallery(context, galleryBlock.id), "reader.json") }
-                val imageCache = { File(getCachedGallery(context, galleryBlock.id), "images") }
-
-                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())
-
-                    with(galleryblock_progressbar) {
-                        max = reader.galleryInfo.size
-                        progress = imageCache.invoke().list()?.size ?: 0
-
-                        visibility = View.VISIBLE
+                galleryblock_thumbnail.apply {
+                    setOnClickListener {
+                        view.performClick()
                     }
-                } 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
-                                }
+                    setOnLongClickListener {
+                        view.performLongClick()
+                    }
+                    setFailureImage(ContextCompat.getDrawable(context, R.drawable.image_broken_variant))
+                    setImageLoaderCallback(object: ImageLoader.Callback {
+                        override fun onFail(error: Exception?) {
+                            Cache.getInstance(context, galleryID).let { cache ->
+                                cache.cacheFolder.getChild(".thumbnail").let { if (it.exists()) it.delete() }
+                                cache.downloadFolder?.getChild(".thumbnail")?.let { if (it.exists()) it.delete() }
                             }
                         }
-                    }
 
-                    refreshTasks[this@GalleryViewHolder] = refresh
+                        override fun onCacheHit(imageType: Int, image: File?) {}
+                        override fun onCacheMiss(imageType: Int, image: File?) {}
+                        override fun onFinish() {}
+                        override fun onProgress(progress: Int) {}
+                        override fun onStart() {}
+                        override fun onSuccess(image: File?) {}
+                    })
+                    ssiv?.recycle()
+                    CoroutineScope(Dispatchers.IO).launch {
+                        cache.getThumbnail().let { launch(Dispatchers.Main) {
+                            showImage(it)
+                        } }
+                    }
                 }
 
                 galleryblock_title.text = galleryBlock.title
                 with(galleryblock_artist) {
-                    text = artists.joinToString(", ") { it.wordCapitalize() }
+                    text = artists.joinToString { it.wordCapitalize() }
                     visibility = when {
                         artists.isNotEmpty() -> View.VISIBLE
                         else -> View.GONE
                     }
+
+                    CoroutineScope(Dispatchers.IO).launch {
+                        val gallery = runCatching {
+                            getGallery(galleryID)
+                        }.getOrNull()
+
+                        if (gallery?.groups?.isNotEmpty() != true)
+                            return@launch
+
+                        launch(Dispatchers.Main) {
+                            text = context.getString(
+                                R.string.galleryblock_artist_with_group,
+                                artists.joinToString { it.wordCapitalize() },
+                                gallery.groups.joinToString { it.wordCapitalize() }
+                            )
+                        }
+                    }
                 }
                 with(galleryblock_series) {
                     text =
@@ -196,41 +221,44 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
                     }
                 }
 
-                galleryblock_tag_group.removeAllViews()
-                galleryBlock.relatedTags.forEach {
-                    galleryblock_tag_group.addView(Chip(context).apply {
-                        val tag = Tag.parse(it).let {  tag ->
-                            when {
-                                tag.area != null -> tag
-                                else -> Tag("tag", it)
-                            }
+                with(galleryblock_tag_group) {
+                    onClickListener = {
+                        onChipClickedHandler.forEach { callback ->
+                            callback.invoke(it)
                         }
+                    }
 
-                        chipIcon = when(tag.area) {
-                            "male" -> {
-                                setChipBackgroundColorResource(R.color.material_blue_700)
-                                setTextColor(ContextCompat.getColor(context, android.R.color.white))
-                                ContextCompat.getDrawable(context, R.drawable.ic_gender_male_white)
-                            }
-                            "female" -> {
-                                setChipBackgroundColorResource(R.color.material_pink_600)
-                                setTextColor(ContextCompat.getColor(context, android.R.color.white))
-                                ContextCompat.getDrawable(context, R.drawable.ic_gender_female_white)
-                            }
-                            else -> null
+                    tags.clear()
+                    tags.addAll(
+                        galleryBlock.relatedTags.sortedBy {
+                            val tag = Tag.parse(it)
+
+                            if (favoriteTags.contains(tag))
+                                -1
+                            else
+                                when(Tag.parse(it).area) {
+                                    "female" -> 0
+                                    "male" -> 1
+                                    else -> 2
+                                }
+                        }.map {
+                            Tag.parse(it)
                         }
-                        text = tag.tag.wordCapitalize()
-                        setOnClickListener {
-                            for (callback in onChipClickedHandler)
-                                callback.invoke(tag)
-                        }
-                    })
+                    )
+
+                    refresh()
                 }
 
                 galleryblock_id.text = galleryBlock.id.toString()
-
-                if (!::favorites.isInitialized)
-                    favorites = (context.applicationContext as Pupil).favorites
+                galleryblock_pagecount.text = "-"
+                CoroutineScope(Dispatchers.IO).launch {
+                    val pageCount = kotlin.runCatching {
+                        getReader(galleryBlock.id).galleryInfo.files.size
+                    }.getOrNull() ?: return@launch
+                    withContext(Dispatchers.Main) {
+                        galleryblock_pagecount.text = context.getString(R.string.galleryblock_pagecount, pageCount)
+                    }
+                }
 
                 with(galleryblock_favorite) {
                     setImageResource(if (favorites.contains(galleryBlock.id)) R.drawable.ic_star_filled else R.drawable.ic_star_empty)
@@ -258,6 +286,12 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
                         }
                     }
                 }
+
+
+                // Make some views invisible to make it thinner
+                if (thin) {
+                    galleryblock_tag_group.visibility = View.GONE
+                }
             }
         }
     }
@@ -276,7 +310,6 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
         }
     }
 
-    private val refreshTasks = HashMap<GalleryViewHolder, TimerTask>()
     val completeFlag = SparseBooleanArray()
 
     val onChipClickedHandler = ArrayList<((Tag) -> Unit)>()
@@ -308,9 +341,9 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
 
     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
         if (holder is GalleryViewHolder) {
-            val gallery = galleries[position-(if (showPrev) 1 else 0)]
+            val galleryID = galleries[position-(if (showPrev) 1 else 0)]
 
-            holder.bind(gallery)
+            holder.bind(galleryID)
 
             with(holder.view.galleryblock_primary) {
                 setOnClickListener {
@@ -335,10 +368,11 @@ 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 (DownloadManager.getInstance(holder.view.context).isDownloading(galleryID))
+                            holder.view.context.getString(android.R.string.cancel)
+                        else
+                            holder.view.context.getString(R.string.main_download)
                 }
 
                 override fun onClose(layout: SwipeLayout?) {}
@@ -350,20 +384,9 @@ class GalleryBlockAdapter(private val glide: RequestManager, private val galleri
         }
     }
 
-    override fun onViewDetachedFromWindow(holder: RecyclerView.ViewHolder) {
-        super.onViewDetachedFromWindow(holder)
-
-        if (holder is GalleryViewHolder) {
-            val task = refreshTasks[holder] ?: return
-
-            task.cancel()
-            refreshTasks.remove(holder)
-        }
-    }
-
     override fun getItemCount() =
-        (if (galleries.isEmpty()) 0 else galleries.size)+
-        (if (showNext) 1 else 0)+
+        galleries.size +
+        (if (showNext) 1 else 0) +
         (if (showPrev) 1 else 0)
 
     override fun getItemViewType(position: Int): Int {

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

@@ -0,0 +1,86 @@
+/*
+ *     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.annotation.SuppressLint
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.MotionEvent
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import kotlinx.android.synthetic.main.item_mirrors.view.*
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.util.Preferences
+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 {
+        Preferences.get<String>("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
+
+    @SuppressLint("ClickableViewAccessibility")
+    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

@@ -18,55 +18,233 @@
 
 package xyz.quaver.pupil.adapters
 
+import android.content.Context
+import android.graphics.DiscretePathEffect
+import android.graphics.drawable.Animatable
+import android.net.Uri
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageView
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.core.content.ContextCompat
+import androidx.core.view.updateLayoutParams
 import androidx.recyclerview.widget.RecyclerView
-import com.bumptech.glide.RequestManager
-import com.bumptech.glide.load.engine.DiskCacheStrategy
-import xyz.quaver.pupil.BuildConfig
+import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
+import com.facebook.drawee.backends.pipeline.Fresco
+import com.facebook.drawee.controller.BaseControllerListener
+import com.facebook.drawee.drawable.ScalingUtils
+import com.facebook.drawee.interfaces.DraweeController
+import com.facebook.drawee.view.SimpleDraweeView
+import com.facebook.imagepipeline.image.ImageInfo
+import com.github.piasy.biv.view.BigImageView
+import com.github.piasy.biv.view.ImageShownCallback
+import com.github.piasy.biv.view.ImageViewFactory
+import kotlinx.android.synthetic.main.item_reader.view.*
+import kotlinx.coroutines.*
+import xyz.quaver.hitomi.Reader
 import xyz.quaver.pupil.R
-import xyz.quaver.pupil.util.getCachedGallery
+import xyz.quaver.pupil.ui.ReaderActivity
+import xyz.quaver.pupil.util.downloader.Cache
 import java.io.File
+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 activity: ReaderActivity,
+    private val galleryID: Int
+) : RecyclerView.Adapter<ReaderAdapter.ViewHolder>() {
+
+    var reader: Reader? = null
 
     var isFullScreen = false
 
-    class ViewHolder(val view: View) : RecyclerView.ViewHolder(view)
+    var onItemClickListener : (() -> (Unit))? = null
+
+    class ViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
+        fun clear() {
+            view.image.mainView.let {
+                when (it) {
+                    is SubsamplingScaleImageView ->
+                        it.recycle()
+                    is SimpleDraweeView ->
+                        it.controller = null
+                }
+            }
+        }
+    }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         return LayoutInflater.from(parent.context).inflate(
             R.layout.item_reader, parent, false
         ).let {
+            with(it) {
+                image.setImageViewFactory(FrescoImageViewFactory().apply {
+                    updateView = { imageInfo ->
+                        it.image.updateLayoutParams<ConstraintLayout.LayoutParams> {
+                            dimensionRatio = "${imageInfo.width}:${imageInfo.height}"
+                        }
+                    }
+                })
+                image.setImageShownCallback(object : ImageShownCallback {
+                    override fun onMainImageShown() {
+                        it.image.mainView.let { v ->
+                            when (v) {
+                                is SubsamplingScaleImageView ->
+                                    if (!isFullScreen) it.image.layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT
+                            }
+                        }
+                    }
+
+                    override fun onThumbnailShown() {}
+                })
+                image.setFailureImage(ContextCompat.getDrawable(context, R.drawable.image_broken_variant))
+                image.setOnClickListener {
+                    this.performClick()
+                }
+                setOnClickListener {
+                    onItemClickListener?.invoke()
+                }
+            }
+
             ViewHolder(it)
         }
     }
 
+    private var cache: Cache? = null
     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
+        if (cache == null)
+            cache = Cache.getInstance(holder.view.context, galleryID)
 
-        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)
+        if (!isFullScreen) {
+            holder.view.setBackgroundResource(R.drawable.reader_item_boundary)
+            holder.view.image.updateLayoutParams<ConstraintLayout.LayoutParams> {
+                height = 0
+                dimensionRatio =
+                    "${reader!!.galleryInfo.files[position].width}:${reader!!.galleryInfo.files[position].height}"
             }
-            .into(holder.view)
+        } else {
+            holder.view.layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
+            holder.view.image.updateLayoutParams<ConstraintLayout.LayoutParams> {
+                height = ConstraintLayout.LayoutParams.MATCH_PARENT
+                dimensionRatio = null
+            }
+            holder.view.background = null
+        }
+
+        holder.view.reader_index.text = (position+1).toString()
+
+        val image = cache!!.getImage(position)
+        val progress = activity.downloader?.progress?.get(galleryID)?.get(position)
+
+        if (progress?.isInfinite() == true && image != null) {
+            holder.view.progress_group.visibility = View.INVISIBLE
+            holder.view.image.showImage(image.uri)
+        } else {
+            holder.view.progress_group.visibility = View.VISIBLE
+            holder.view.reader_item_progressbar.progress =
+                if (progress?.isInfinite() == true)
+                    100
+                else
+                    progress?.roundToInt() ?: 0
+
+            holder.clear()
+
+            CoroutineScope(Dispatchers.Main).launch {
+                delay(1000)
+                notifyItemChanged(position)
+            }
+        }
     }
 
-    override fun getItemCount() = images.size
+    override fun getItemCount() = reader?.galleryInfo?.files?.size ?: 0
+
+    override fun onViewRecycled(holder: ViewHolder) {
+        holder.clear()
+    }
 
 }
+
+class FrescoImageViewFactory : ImageViewFactory() {
+    var updateView: ((ImageInfo) -> Unit)? = null
+
+    override fun createAnimatedImageView(
+        context: Context, imageType: Int,
+        initScaleType: Int
+    ): View {
+        val view = SimpleDraweeView(context)
+        view.hierarchy.actualImageScaleType = scaleType(initScaleType)
+        return view
+    }
+
+    override fun loadAnimatedContent(
+        view: View, imageType: Int,
+        imageFile: File
+    ) {
+        if (view is SimpleDraweeView) {
+            val controller: DraweeController = Fresco.newDraweeControllerBuilder()
+                .setUri(Uri.parse("file://" + imageFile.absolutePath))
+                .setAutoPlayAnimations(true)
+                .setControllerListener(object: BaseControllerListener<ImageInfo>() {
+                    override fun onIntermediateImageSet(id: String?, imageInfo: ImageInfo?) {
+                        imageInfo?.let { updateView?.invoke(it) }
+                    }
+
+                    override fun onFinalImageSet(id: String?, imageInfo: ImageInfo?, animatable: Animatable?) {
+                        imageInfo?.let { updateView?.invoke(it) }
+                    }
+                })
+                .build()
+            view.controller = controller
+        }
+    }
+
+    override fun createThumbnailView(
+        context: Context,
+        scaleType: ImageView.ScaleType, willLoadFromNetwork: Boolean
+    ): View {
+        return if (willLoadFromNetwork) {
+            val thumbnailView = SimpleDraweeView(context)
+            thumbnailView.hierarchy.actualImageScaleType = scaleType(scaleType)
+            thumbnailView
+        } else {
+            super.createThumbnailView(context, scaleType, false)
+        }
+    }
+
+    override fun loadThumbnailContent(view: View, thumbnail: Uri) {
+        if (view is SimpleDraweeView) {
+            val controller: DraweeController = Fresco.newDraweeControllerBuilder()
+                .setUri(thumbnail)
+                .build()
+            view.controller = controller
+        }
+    }
+
+    private fun scaleType(value: Int): ScalingUtils.ScaleType {
+        return when (value) {
+            BigImageView.INIT_SCALE_TYPE_CENTER -> ScalingUtils.ScaleType.CENTER
+            BigImageView.INIT_SCALE_TYPE_CENTER_CROP -> ScalingUtils.ScaleType.CENTER_CROP
+            BigImageView.INIT_SCALE_TYPE_CENTER_INSIDE -> ScalingUtils.ScaleType.CENTER_INSIDE
+            BigImageView.INIT_SCALE_TYPE_FIT_END -> ScalingUtils.ScaleType.FIT_END
+            BigImageView.INIT_SCALE_TYPE_FIT_START -> ScalingUtils.ScaleType.FIT_START
+            BigImageView.INIT_SCALE_TYPE_FIT_XY -> ScalingUtils.ScaleType.FIT_XY
+            BigImageView.INIT_SCALE_TYPE_FIT_CENTER -> ScalingUtils.ScaleType.FIT_CENTER
+            else -> ScalingUtils.ScaleType.FIT_CENTER
+        }
+    }
+
+    private fun scaleType(scaleType: ImageView.ScaleType): ScalingUtils.ScaleType {
+        return when (scaleType) {
+            ImageView.ScaleType.CENTER -> ScalingUtils.ScaleType.CENTER
+            ImageView.ScaleType.CENTER_CROP -> ScalingUtils.ScaleType.CENTER_CROP
+            ImageView.ScaleType.CENTER_INSIDE -> ScalingUtils.ScaleType.CENTER_INSIDE
+            ImageView.ScaleType.FIT_END -> ScalingUtils.ScaleType.FIT_END
+            ImageView.ScaleType.FIT_START -> ScalingUtils.ScaleType.FIT_START
+            ImageView.ScaleType.FIT_XY -> ScalingUtils.ScaleType.FIT_XY
+            ImageView.ScaleType.FIT_CENTER -> ScalingUtils.ScaleType.FIT_CENTER
+            else -> ScalingUtils.ScaleType.FIT_CENTER
+        }
+    }
+}

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

@@ -18,30 +18,35 @@
 
 package xyz.quaver.pupil.adapters
 
+import android.net.Uri
 import android.view.ViewGroup
-import android.widget.ImageView
+import androidx.core.content.ContextCompat
 import androidx.recyclerview.widget.RecyclerView
-import com.bumptech.glide.RequestManager
-import xyz.quaver.pupil.BuildConfig
+import com.github.piasy.biv.view.BigImageView
+import xyz.quaver.pupil.R
 
-class ThumbnailAdapter(private val glide: RequestManager, private val thumbnails: List<String>) : RecyclerView.Adapter<ThumbnailAdapter.ViewHolder>() {
+class ThumbnailAdapter(var thumbnails: List<String>) : RecyclerView.Adapter<ThumbnailAdapter.ViewHolder>() {
 
-    class ViewHolder(val view: ImageView) : RecyclerView.ViewHolder(view)
+    class ViewHolder(val view: BigImageView) : RecyclerView.ViewHolder(view) {
+        fun clear() {
+            view.ssiv?.recycle()
+        }
+    }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
-        return ViewHolder(ImageView(parent.context))
+        return ViewHolder(BigImageView(parent.context).apply {
+            setFailureImage(ContextCompat.getDrawable(context, R.drawable.image_broken_variant))
+        })
     }
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        glide
-            .load(thumbnails[position])
-            .apply {
-                if (BuildConfig.CENSOR)
-                    override(5, 8)
-            }
-            .into(holder.view)
+        holder.view.showImage(Uri.parse(thumbnails[position]))
     }
 
     override fun getItemCount() = thumbnails.size
 
+    override fun onViewRecycled(holder: ViewHolder) {
+        holder.clear()
+    }
+
 }

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

@@ -0,0 +1,52 @@
+/*
+ *     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.view.ViewGroup
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import kotlin.math.min
+
+class ThumbnailPageAdapter(private val thumbnails: List<String>) : RecyclerView.Adapter<ThumbnailPageAdapter.ViewHolder>() {
+
+    class ViewHolder(val view: RecyclerView) : RecyclerView.ViewHolder(view)
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        return ViewHolder(RecyclerView(parent.context).apply {
+            val layoutManager = GridLayoutManager(parent.context, 3)
+            val adapter = ThumbnailAdapter(listOf())
+
+            this.layoutManager = layoutManager
+            this.adapter = adapter
+            layoutParams = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
+        })
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        (holder.view.adapter as ThumbnailAdapter).apply {
+            thumbnails = this@ThumbnailPageAdapter.thumbnails.slice(9*position until min(9*position+9, this@ThumbnailPageAdapter.thumbnails.size))
+            notifyDataSetChanged()
+
+            (holder.view.layoutManager as GridLayoutManager).scrollToPosition(8)
+        }
+    }
+
+    override fun getItemCount() = if (thumbnails.isEmpty()) 0 else thumbnails.size/9 + if (thumbnails.size%9 != 0) 1 else 0
+
+}

app/src/main/java/xyz/quaver/pupil/receiver/UpdateBroadcastReceiver.kt

@@ -0,0 +1,93 @@
+/*
+ *     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.receiver
+
+import android.app.DownloadManager
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.webkit.MimeTypeMap
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.content.FileProvider
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.util.Preferences
+import java.io.File
+
+class UpdateBroadcastReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context?, intent: Intent?) {
+        context ?: return
+
+        when (intent?.action) {
+            DownloadManager.ACTION_DOWNLOAD_COMPLETE -> {
+
+                // Validate download
+                val downloadID: Long = Preferences["update_download_id"]
+                val downloadManager = context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
+
+                if (intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -2) != downloadID)
+                    return
+
+                // Get target uri
+
+                val query = DownloadManager.Query()
+                    .setFilterById(downloadID)
+
+                val uri = downloadManager.query(query).use { cursor ->
+                    if (cursor.moveToFirst()) {
+                        cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI)).let {
+                            val uri = Uri.parse(it)
+
+                            when (uri.scheme) {
+                                "file" ->
+                                    FileProvider.getUriForFile(context, context.applicationContext.packageName + ".provider", File(uri.path!!)
+                                    )
+                                "content" -> uri
+                                else -> null
+                            }
+                        }
+                    } else
+                        null
+                } ?: return
+
+                // Build Notification
+
+                val notificationManager = NotificationManagerCompat.from(context)
+
+                val pendingIntent = PendingIntent.getActivity(context, 0, Intent(Intent.ACTION_VIEW).apply {
+                    flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_ACTIVITY_NEW_TASK
+                    setDataAndType(uri, MimeTypeMap.getSingleton().getMimeTypeFromExtension("apk"))
+                }, 0)
+
+                val notification = NotificationCompat.Builder(context, "update")
+                    .setSmallIcon(android.R.drawable.stat_sys_download_done)
+                    .setContentTitle(context.getText(R.string.update_download_completed))
+                    .setContentText(context.getText(R.string.update_download_completed_description))
+                    .setContentIntent(pendingIntent)
+                    .build()
+
+                notificationManager.notify(R.id.notification_id_update, notification)
+            }
+        }
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/services/DownloadService.kt

@@ -0,0 +1,425 @@
+/*
+ *     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.services
+
+import android.annotation.SuppressLint
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.app.TaskStackBuilder
+import androidx.core.content.ContextCompat
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.Response
+import okhttp3.ResponseBody
+import okio.*
+import xyz.quaver.pupil.*
+import xyz.quaver.pupil.ui.ReaderActivity
+import xyz.quaver.pupil.util.cleanCache
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.downloader.DownloadManager
+import xyz.quaver.pupil.util.ellipsize
+import xyz.quaver.pupil.util.normalizeID
+import xyz.quaver.pupil.util.requestBuilders
+import java.io.IOException
+import java.util.*
+import java.util.concurrent.ConcurrentHashMap
+import kotlin.math.ceil
+import kotlin.math.log10
+
+private typealias ProgressListener = (DownloadService.Tag, Long, Long, Boolean) -> Unit
+class DownloadService : Service() {
+    data class Tag(val galleryID: Int, val index: Int, val startId: Int? = null)
+
+    //region Notification
+    private val notificationManager by lazy {
+        NotificationManagerCompat.from(this)
+    }
+
+    private val serviceNotification by lazy {
+        NotificationCompat.Builder(this, "downloader")
+            .setContentTitle(getString(R.string.downloader_running))
+            .setProgress(0, 0, false)
+            .setSmallIcon(R.drawable.ic_notification)
+            .setOngoing(true)
+    }
+
+    private val notification = ConcurrentHashMap<Int, NotificationCompat.Builder?>()
+
+    private fun initNotification(galleryID: Int) {
+        val intent = Intent(this, ReaderActivity::class.java)
+            .putExtra("galleryID", galleryID)
+
+        val pendingIntent = TaskStackBuilder.create(this).run {
+            addNextIntentWithParentStack(intent)
+            getPendingIntent(galleryID, PendingIntent.FLAG_UPDATE_CURRENT)
+        }
+        val action =
+            NotificationCompat.Action.Builder(0, getText(android.R.string.cancel),
+                PendingIntent.getService(
+                    this,
+                    R.id.notification_download_cancel_action.normalizeID(),
+                    Intent(this, DownloadService::class.java)
+                        .putExtra(KEY_COMMAND, COMMAND_CANCEL)
+                        .putExtra(KEY_ID, galleryID),
+                    PendingIntent.FLAG_UPDATE_CURRENT),
+            ).build()
+
+        notification[galleryID] = NotificationCompat.Builder(this, "download").apply {
+            setContentTitle(getString(R.string.reader_loading))
+            setContentText(getString(R.string.reader_notification_text))
+            setSmallIcon(R.drawable.ic_notification)
+            setContentIntent(pendingIntent)
+            addAction(action)
+            setProgress(0, 0, true)
+            setOngoing(true)
+        }
+
+        notify(galleryID)
+    }
+
+    @SuppressLint("RestrictedApi")
+    private fun notify(galleryID: Int) {
+        val max = progress[galleryID]?.size ?: 0
+        val progress = progress[galleryID]?.count { it == Float.POSITIVE_INFINITY } ?: 0
+
+        val notification = notification[galleryID] ?: return
+
+        if (isCompleted(galleryID)) {
+            notification
+                .setContentText(getString(R.string.reader_notification_complete))
+                .setProgress(0, 0, false)
+                .setOngoing(false)
+                .mActions.clear()
+
+            notificationManager.cancel(galleryID)
+        } else
+            notification
+                .setProgress(max, progress, false)
+                .setContentText("$progress/$max")
+
+        if (DownloadManager.getInstance(this).getDownloadFolder(galleryID) != null || galleryID == priority)
+            notification.let { notificationManager.notify(galleryID, it.build()) }
+        else
+            notificationManager.cancel(galleryID)
+    }
+    //endregion
+
+    //region ProgressListener
+    @Suppress("UNCHECKED_CAST")
+    private val progressListener: ProgressListener = { (galleryID, index), bytesRead, contentLength, done ->
+        if (!done && progress[galleryID]?.get(index)?.isFinite() == true)
+            progress[galleryID]?.set(index, bytesRead * 100F / contentLength)
+    }
+
+    private 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()
+
+        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.invoke(tag as Tag, totalBytesRead, responseBody.contentLength(), bytesRead == -1L)
+
+                return bytesRead
+            }
+        }
+    }
+
+    private val interceptor: PupilInterceptor = { chain ->
+        val request = chain.request()
+        var response = chain.proceed(request)
+
+        var retry = 5
+        while (!response.isSuccessful && retry > 0) {
+            response = chain.proceed(request)
+            retry--
+        }
+
+        response.newBuilder()
+            .body(response.body()?.let {
+                ProgressResponseBody(request.tag(), it, progressListener)
+            }).build()
+    }
+    //endregion
+
+    //region Downloader
+    /**
+    * 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
+    */
+    val progress = ConcurrentHashMap<Int, MutableList<Float>>()
+    var priority = 0
+
+    fun isCompleted(galleryID: Int) = progress[galleryID]?.toList()?.all { it == Float.POSITIVE_INFINITY } == true
+
+    private val callback = object: Callback {
+
+        override fun onFailure(call: Call, e: IOException) {
+            if (e.message?.contains("cancel", true) == false) {
+                val galleryID = (call.request().tag() as Tag).galleryID
+
+                // Retry
+                cancel(galleryID)
+                download(galleryID)
+            }
+        }
+
+        override fun onResponse(call: Call, response: Response) {
+            val (galleryID, index, startId) = call.request().tag() as Tag
+            val ext = call.request().url().encodedPath().split('.').last()
+
+            kotlin.runCatching {
+                val image = response.also { if (it.code() != 200) throw IOException() }.body()?.use { it.bytes() } ?: throw Exception()
+                val padding = ceil(progress[galleryID]?.size?.let { log10(it.toFloat()) } ?: 0F).toInt()
+
+                CoroutineScope(Dispatchers.IO).launch {
+                    kotlin.runCatching {
+                        Cache.getInstance(this@DownloadService, galleryID).putImage(index, "${index.toString().padStart(padding, '0')}.$ext", image)
+                    }.onSuccess {
+                        progress[galleryID]?.set(index, Float.POSITIVE_INFINITY)
+                        notify(galleryID)
+
+                        if (isCompleted(galleryID)) {
+                            if (DownloadManager.getInstance(this@DownloadService)
+                                    .getDownloadFolder(galleryID) != null)
+                                Cache.getInstance(this@DownloadService, galleryID).moveToDownload()
+
+                            startId?.let { stopSelf(it) }
+                        }
+                    }.onFailure {
+                        cancel(galleryID)
+                        download(galleryID)
+                    }
+                }
+            }
+        }
+    }
+
+    fun cancel(startId: Int? = null) {
+        client.dispatcher().queuedCalls().filter {
+            it.request().tag() is Tag
+        }.forEach {
+            (it.request().tag() as? Tag)?.startId?.let { stopSelf(it) }
+            it.cancel()
+        }
+        client.dispatcher().runningCalls().filter {
+            it.request().tag() is Tag
+        }.forEach {
+            (it.request().tag() as? Tag)?.startId?.let { stopSelf(it) }
+            it.cancel()
+        }
+
+        progress.clear()
+        notification.clear()
+        notificationManager.cancelAll()
+
+        startId?.let { stopSelf(it) }
+    }
+
+    fun cancel(galleryID: Int, startId: Int? = null) {
+        client.dispatcher().queuedCalls().filter {
+            (it.request().tag() as? Tag)?.galleryID == galleryID
+        }.forEach {
+            (it.request().tag() as? Tag)?.startId?.let { stopSelf(it) }
+            it.cancel()
+        }
+        client.dispatcher().runningCalls().filter {
+            (it.request().tag() as? Tag)?.galleryID == galleryID
+        }.forEach {
+            (it.request().tag() as? Tag)?.startId?.let { stopSelf(it) }
+            it.cancel()
+        }
+
+        progress.remove(galleryID)
+        notification.remove(galleryID)
+        notificationManager.cancel(galleryID)
+
+        startId?.let { stopSelf(it) }
+    }
+
+    fun delete(galleryID: Int, startId: Int? = null) = CoroutineScope(Dispatchers.IO).launch {
+        cancel(galleryID)
+        DownloadManager.getInstance(this@DownloadService).deleteDownloadFolder(galleryID)
+        Cache.delete(this@DownloadService, galleryID)
+
+        startId?.let { stopSelf(it) }
+    }
+
+    fun download(galleryID: Int, priority: Boolean = false, startId: Int? = null): Job = CoroutineScope(Dispatchers.IO).launch {
+        if (DownloadManager.getInstance(this@DownloadService).isDownloading(galleryID))
+            return@launch
+
+        cleanCache(this@DownloadService)
+
+        val cache = Cache.getInstance(this@DownloadService, galleryID)
+
+        initNotification(galleryID)
+
+        val reader = cache.getReader()
+
+        // Gallery doesn't exist
+        if (reader == null) {
+            delete(galleryID)
+            progress[galleryID] = mutableListOf()
+            return@launch
+        }
+
+        histories.add(galleryID)
+
+        progress[galleryID] = MutableList(reader.galleryInfo.files.size) { 0F }
+
+        cache.metadata.imageList?.let {
+            it.forEachIndexed { index, image ->
+                progress[galleryID]?.set(index, if (image != null) Float.POSITIVE_INFINITY else 0F)
+            }
+        }
+
+        if (isCompleted(galleryID)) {
+            if (DownloadManager.getInstance(this@DownloadService)
+                    .getDownloadFolder(galleryID) != null )
+                Cache.getInstance(this@DownloadService, galleryID).moveToDownload()
+
+            notificationManager.cancel(galleryID)
+            startId?.let { stopSelf(it) }
+            return@launch
+        }
+
+        notification[galleryID]?.setContentTitle(reader.galleryInfo.title?.ellipsize(30))
+        notify(galleryID)
+
+        val queued = mutableSetOf<Int>()
+
+        if (priority) {
+            client.dispatcher().queuedCalls().forEach {
+                val queuedID = (it.request().tag() as? Tag)?.galleryID ?: return@forEach
+
+                if (queued.add(queuedID))
+                    cancel(queuedID)
+            }
+        }
+
+        reader.requestBuilders.forEachIndexed { index, it ->
+            if (progress[galleryID]?.get(index)?.isInfinite() == false) {
+                val request = it.tag(Tag(galleryID, index, startId)).build()
+                client.newCall(request).enqueue(callback)
+            }
+        }
+
+        queued.forEach { download(it) }
+    }
+    //endregion
+
+    companion object {
+        const val KEY_COMMAND = "COMMAND"   // String
+        const val KEY_ID = "ID"             // Int
+        const val KEY_PRIORITY = "PRIORITY" // Boolean
+
+        const val COMMAND_DOWNLOAD = "DOWNLOAD"
+        const val COMMAND_CANCEL = "CANCEL"
+        const val COMMAND_DELETE = "DELETE"
+
+        private fun command(context: Context, extras: Intent.() -> Unit) {
+            ContextCompat.startForegroundService(context, Intent(context, DownloadService::class.java).apply(extras))
+        }
+
+        fun download(context: Context, galleryID: Int, priority: Boolean = false) {
+            command(context) {
+                putExtra(KEY_COMMAND, COMMAND_DOWNLOAD)
+                putExtra(KEY_PRIORITY, priority)
+                putExtra(KEY_ID, galleryID)
+            }
+        }
+
+        fun cancel(context: Context, galleryID: Int? = null) {
+            command(context) {
+                putExtra(KEY_COMMAND, COMMAND_CANCEL)
+                galleryID?.let { putExtra(KEY_ID, it) }
+            }
+        }
+
+        fun delete(context: Context, galleryID: Int) {
+            command(context) {
+                putExtra(KEY_COMMAND, COMMAND_DELETE)
+                putExtra(KEY_ID, galleryID)
+            }
+        }
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        startForeground(R.id.downloader_notification_id, serviceNotification.build())
+
+        when (intent?.getStringExtra(KEY_COMMAND)) {
+            COMMAND_DOWNLOAD -> intent.getIntExtra(KEY_ID, -1).let { if (it > 0)
+                download(it, intent.getBooleanExtra(KEY_PRIORITY, false), startId)
+            }
+            COMMAND_CANCEL -> intent.getIntExtra(KEY_ID, -1).let { if (it > 0) cancel(it, startId) else cancel(startId = startId) }
+            COMMAND_DELETE -> intent.getIntExtra(KEY_ID, -1).let { if (it > 0) delete(it, startId) }
+        }
+
+        return START_NOT_STICKY
+    }
+
+    inner class Binder : android.os.Binder() {
+        val service = this@DownloadService
+    }
+
+    private val binder = Binder()
+    override fun onBind(p0: Intent?) = binder
+
+    override fun onCreate() {
+        startForeground(R.id.downloader_notification_id, serviceNotification.build())
+        interceptors[Tag::class] = interceptor
+    }
+
+    override fun onDestroy() {
+        interceptors.remove(Tag::class)
+    }
+}

app/src/main/java/xyz/quaver/pupil/types/Suggestions.kt

@@ -18,15 +18,33 @@
 
 package xyz.quaver.pupil.types
 
-import com.arlib.floatingsearchview.suggestions.model.SearchSuggestion
+import kotlinx.android.parcel.IgnoredOnParcel
 import kotlinx.android.parcel.Parcelize
+import xyz.quaver.floatingsearchview.suggestions.model.SearchSuggestion
 import xyz.quaver.hitomi.Suggestion
+import xyz.quaver.pupil.util.translations
 
 @Parcelize
 data class TagSuggestion(val s: String, val t: Int, val u: String, val n: String) : SearchSuggestion {
     constructor(s: Suggestion) : this(s.s, s.t, s.u, s.n)
 
-    override fun getBody(): String {
-        return s
-    }
+    @IgnoredOnParcel
+    override val body =
+        if (translations[s] != null)
+            "${translations[s]} ($s)"
+        else
+            s
 }
+
+@Parcelize
+class Suggestion(override val body: String) : SearchSuggestion
+
+@Parcelize
+class NoResultSuggestion(override val body: String) : SearchSuggestion
+
+@Parcelize
+class LoadingSuggestion(override val body: String) : SearchSuggestion
+
+@Parcelize
+@Suppress("PARCELABLE_PRIMARY_CONSTRUCTOR_IS_EMPTY")
+class FavoriteHistorySwitch(override val body: String) : SearchSuggestion

app/src/main/java/xyz/quaver/pupil/types/Tags.kt

@@ -24,7 +24,7 @@ import kotlinx.serialization.Serializable
 data class Tag(val area: String?, val tag: String, val isNegative: Boolean = false) {
     companion object {
         fun parse(tag: String) : Tag {
-            if (tag.first() == '-') {
+            if (tag.firstOrNull() == '-') {
                 tag.substring(1).split(Regex(":"), 2).let {
                     return when(it.size) {
                         2 -> Tag(it[0], it[1], true)
@@ -62,12 +62,10 @@ data class Tag(val area: String?, val tag: String, val isNegative: Boolean = fal
         return false
     }
 
-    override fun hashCode(): Int {
-        return super.hashCode()
-    }
+    override fun hashCode() = toString().hashCode()
 }
 
-class Tags(tag: List<Tag?>?) : ArrayList<Tag>() {
+class Tags(val tags: MutableSet<Tag> = mutableSetOf()) : MutableSet<Tag> by tags {
 
     companion object {
         fun parse(tags: String) : Tags {
@@ -77,20 +75,13 @@ class Tags(tag: List<Tag?>?) : ArrayList<Tag>() {
                         Tag.parse(it)
                     else
                         null
-                }
+                }.filterNotNull().toMutableSet()
             )
         }
     }
 
-    init {
-        tag?.forEach {
-            if (it != null)
-                add(it)
-        }
-    }
-
     fun contains(element: String): Boolean {
-        forEach {
+        tags.forEach {
             if (it.toString() == element)
                 return true
         }
@@ -99,23 +90,22 @@ class Tags(tag: List<Tag?>?) : ArrayList<Tag>() {
     }
 
     fun add(element: String): Boolean {
-        return super.add(Tag.parse(element))
+        return tags.add(Tag.parse(element))
     }
 
     fun remove(element: String) {
-        filter { it.toString() == element }.forEach {
-            remove(it)
+        tags.filter { it.toString() == element }.forEach {
+            tags.remove(it)
         }
     }
 
     fun removeByArea(area: String, isNegative: Boolean? = null) {
-        filter { it.area == area && (if(isNegative == null) true else (it.isNegative == isNegative)) }.forEach {
-            remove(it)
+        tags.filter { it.area == area && (if(isNegative == null) true else (it.isNegative == isNegative)) }.forEach {
+            tags.remove(it)
         }
     }
 
     override fun toString(): String {
-        return joinToString(" ") { it.toString() }
+        return tags.joinToString(" ") { it.toString() }
     }
-
 }

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

@@ -0,0 +1,67 @@
+/*
+ *     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
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.os.PersistableBundle
+import android.view.WindowManager
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.annotation.CallSuper
+import androidx.appcompat.app.AppCompatActivity
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.util.LockManager
+import xyz.quaver.pupil.util.Preferences
+import xyz.quaver.pupil.util.normalizeID
+
+open class BaseActivity : AppCompatActivity() {
+
+    private var locked: Boolean = true
+
+    private val lockLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+        if (it.resultCode == Activity.RESULT_OK)
+            locked = false
+        else
+            finish()
+    }
+
+    @CallSuper
+    override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
+        super.onCreate(savedInstanceState, persistentState)
+
+        locked = !LockManager(this).locks.isNullOrEmpty()
+    }
+
+    @CallSuper
+    override fun onResume() {
+        super.onResume()
+
+        if (Preferences["security_mode"])
+            window.setFlags(
+                WindowManager.LayoutParams.FLAG_SECURE,
+                WindowManager.LayoutParams.FLAG_SECURE)
+        else
+            window.clearFlags(WindowManager.LayoutParams.FLAG_SECURE)
+
+        if (locked)
+            lockLauncher.launch(Intent(this, LockActivity::class.java))
+    }
+
+}

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

@@ -21,22 +21,161 @@ package xyz.quaver.pupil.ui
 import android.app.Activity
 import android.app.AlertDialog
 import android.os.Bundle
+import android.view.animation.Animation
+import android.view.animation.AnimationUtils
 import androidx.appcompat.app.AppCompatActivity
+import androidx.biometric.BiometricManager
+import androidx.biometric.BiometricPrompt
+import androidx.core.content.ContextCompat
 import com.andrognito.patternlockview.PatternLockView
 import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.activity_lock.*
 import kotlinx.android.synthetic.main.fragment_pattern_lock.*
+import kotlinx.android.synthetic.main.fragment_pin_lock.*
 import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.fragment.PINLockFragment
+import xyz.quaver.pupil.ui.fragment.PatternLockFragment
 import xyz.quaver.pupil.util.Lock
 import xyz.quaver.pupil.util.LockManager
+import xyz.quaver.pupil.util.Preferences
 
+private var lastUnlocked = 0L
 class LockActivity : AppCompatActivity() {
 
+    private lateinit var lockManager: LockManager
+    private var mode: String? = null
+
+    private val patternLockFragment = PatternLockFragment().apply {
+        var lastPass = ""
+        onPatternDrawn = {
+            when(mode) {
+                null -> {
+                    val result = lockManager.check(it)
+
+                    if (result == true) {
+                        lastUnlocked = System.currentTimeMillis()
+                        setResult(Activity.RESULT_OK)
+                        finish()
+                    } else
+                        lock_pattern_view.setViewMode(PatternLockView.PatternViewMode.WRONG)
+                }
+                "add_lock" -> {
+                    if (lastPass.isEmpty()) {
+                        lastPass = it
+
+                        Snackbar.make(view!!, R.string.settings_lock_confirm, Snackbar.LENGTH_LONG).show()
+                    } else {
+                        if (lastPass == it) {
+                            LockManager(context!!).add(Lock.generate(Lock.Type.PATTERN, it))
+                            finish()
+                        } else {
+                            lock_pattern_view.setViewMode(PatternLockView.PatternViewMode.WRONG)
+                            lastPass = ""
+
+                            Snackbar.make(view!!, R.string.settings_lock_wrong_confirm, Snackbar.LENGTH_LONG).show()
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private val pinLockFragment = PINLockFragment().apply {
+        var lastPass = ""
+        onPINEntered = {
+            when(mode) {
+                null -> {
+                    val result = lockManager.check(it)
+
+                    if (result == true) {
+                        lastUnlocked = System.currentTimeMillis()
+                        setResult(Activity.RESULT_OK)
+                        finish()
+                    } else {
+                        indicator_dots.startAnimation(AnimationUtils.loadAnimation(context, R.anim.shake).apply {
+                            setAnimationListener(object: Animation.AnimationListener {
+                                override fun onAnimationEnd(animation: Animation?) {
+                                    pin_lock_view.resetPinLockView()
+                                    pin_lock_view.isEnabled = true
+                                }
+
+                                override fun onAnimationStart(animation: Animation?) {
+                                    pin_lock_view.isEnabled = false
+                                }
+
+                                override fun onAnimationRepeat(animation: Animation?) {
+                                    // Do Nothing
+                                }
+                            })
+                        })
+                    }
+                }
+                "add_lock" -> {
+                    if (lastPass.isEmpty()) {
+                        lastPass = it
+
+                        pin_lock_view.resetPinLockView()
+                        Snackbar.make(view!!, R.string.settings_lock_confirm, Snackbar.LENGTH_LONG).show()
+                    } else {
+                        if (lastPass == it) {
+                            LockManager(context!!).add(Lock.generate(Lock.Type.PIN, it))
+                            finish()
+                        } else {
+                            indicator_dots.startAnimation(AnimationUtils.loadAnimation(context, R.anim.shake).apply {
+                                setAnimationListener(object: Animation.AnimationListener {
+                                    override fun onAnimationEnd(animation: Animation?) {
+                                        pin_lock_view.resetPinLockView()
+                                        pin_lock_view.isEnabled = true
+                                    }
+
+                                    override fun onAnimationStart(animation: Animation?) {
+                                        pin_lock_view.isEnabled = false
+                                    }
+
+                                    override fun onAnimationRepeat(animation: Animation?) {
+                                        // Do Nothing
+                                    }
+                                })
+                            })
+                            lastPass = ""
+
+                            Snackbar.make(view!!, R.string.settings_lock_wrong_confirm, Snackbar.LENGTH_LONG).show()
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private fun showBiometricPrompt() {
+        val promptInfo = BiometricPrompt.PromptInfo.Builder()
+            .setTitle(getText(R.string.settings_lock_fingerprint_prompt))
+            .setSubtitle(getText(R.string.settings_lock_fingerprint_prompt_subtitle))
+            .setNegativeButtonText(getText(android.R.string.cancel))
+            .setConfirmationRequired(false)
+            .build()
+
+        val biometricPrompt = BiometricPrompt(this, ContextCompat.getMainExecutor(this),
+            object : BiometricPrompt.AuthenticationCallback() {
+                override fun onAuthenticationSucceeded(
+                    result: BiometricPrompt.AuthenticationResult) {
+                    super.onAuthenticationSucceeded(result)
+                    lastUnlocked = System.currentTimeMillis()
+                    setResult(RESULT_OK)
+                    finish()
+                    return
+                }
+            })
+
+        // Displays the "log in" prompt.
+        biometricPrompt.authenticate(promptInfo)
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_lock)
 
-        val lockManager = try {
+        lockManager = try {
             LockManager(this)
         } catch (e: Exception) {
             AlertDialog.Builder(this).apply {
@@ -49,12 +188,8 @@ class LockActivity : AppCompatActivity() {
             return
         }
 
-        val mode = intent.getStringExtra("mode")
-
-        lock_pattern.isEnabled = false
-        lock_pin.isEnabled = false
-        lock_fingerprint.isEnabled = false
-        lock_password.isEnabled = false
+        mode = intent.getStringExtra("mode")
+        val force = intent.getBooleanExtra("force", false)
 
         when(mode) {
             null -> {
@@ -63,52 +198,82 @@ class LockActivity : AppCompatActivity() {
                     finish()
                     return
                 }
+
+                if (System.currentTimeMillis() - lastUnlocked < 5*60*1000 && !force) {
+                    lastUnlocked = System.currentTimeMillis()
+                    setResult(RESULT_OK)
+                    finish()
+                    return
+                }
+
+                if (
+                    Preferences["lock_fingerprint"]
+                    && BiometricManager.from(this).canAuthenticate() == BiometricManager.BIOMETRIC_SUCCESS
+                ) {
+                    lock_fingerprint.apply {
+                        isEnabled = true
+                        setOnClickListener {
+                            showBiometricPrompt()
+                        }
+                    }
+                    showBiometricPrompt()
+                }
+
+                lock_pattern.apply {
+                    isEnabled = lockManager.contains(Lock.Type.PATTERN)
+                    setOnClickListener {
+                        supportFragmentManager.beginTransaction().replace(
+                            R.id.lock_content, patternLockFragment
+                        ).commit()
+                    }
+                }
+                lock_pin.apply {
+                    isEnabled = lockManager.contains(Lock.Type.PIN)
+                    setOnClickListener {
+                        supportFragmentManager.beginTransaction().replace(
+                            R.id.lock_content, pinLockFragment
+                        ).commit()
+                    }
+                }
+                lock_password.isEnabled = false
+
+                when (lockManager.locks!!.first().type) {
+                    Lock.Type.PIN -> {
+
+                        supportFragmentManager.beginTransaction().add(
+                            R.id.lock_content, pinLockFragment
+                        ).commit()
+                    }
+                    Lock.Type.PATTERN -> {
+                        supportFragmentManager.beginTransaction().add(
+                            R.id.lock_content, patternLockFragment
+                        ).commit()
+                    }
+                    else -> return
+                }
             }
             "add_lock" -> {
+                lock_pattern.isEnabled = false
+                lock_pin.isEnabled = false
+                lock_fingerprint.isEnabled = false
+                lock_password.isEnabled = false
+
                 when(intent.getStringExtra("type")!!) {
                     "pattern" -> {
-
+                        lock_pattern.isEnabled = true
+                        supportFragmentManager.beginTransaction().add(
+                            R.id.lock_content, patternLockFragment
+                        ).commit()
+                    }
+                    "pin" -> {
+                        lock_pin.isEnabled = true
+                        supportFragmentManager.beginTransaction().add(
+                            R.id.lock_content, pinLockFragment
+                        ).commit()
                     }
                 }
             }
         }
-
-        supportFragmentManager.beginTransaction().add(
-            R.id.lock_content,
-            PatternLockFragment().apply {
-                var lastPass = ""
-                onPatternDrawn = {
-                    when(mode) {
-                        null -> {
-                            val result = lockManager.check(it)
-
-                            if (result == true) {
-                                setResult(Activity.RESULT_OK)
-                                finish()
-                            } else
-                                lock_pattern_view.setViewMode(PatternLockView.PatternViewMode.WRONG)
-                        }
-                        "add_lock" -> {
-                            if (lastPass.isEmpty()) {
-                                lastPass = it
-
-                                Snackbar.make(view!!, R.string.settings_lock_confirm, Snackbar.LENGTH_LONG).show()
-                            } else {
-                                if (lastPass == it) {
-                                    LockManager(context!!).add(Lock.generate(Lock.Type.PATTERN, it))
-                                    finish()
-                                } else {
-                                    lock_pattern_view.setViewMode(PatternLockView.PatternViewMode.WRONG)
-                                    lastPass = ""
-
-                                    Snackbar.make(view!!, R.string.settings_lock_wrong_confirm, Snackbar.LENGTH_LONG).show()
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        ).commit()
     }
 
 }

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

@@ -19,43 +19,55 @@
 package xyz.quaver.pupil.ui
 
 import android.Manifest
+import android.content.ComponentName
 import android.content.Intent
+import android.content.ServiceConnection
+import android.content.pm.PackageManager
 import android.graphics.drawable.Animatable
 import android.graphics.drawable.Drawable
-import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.os.IBinder
 import android.view.*
+import android.view.animation.Animation
+import android.view.animation.AnticipateInterpolator
+import android.view.animation.OvershootInterpolator
+import android.view.animation.TranslateAnimation
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AlertDialog
-import androidx.appcompat.app.AppCompatActivity
-import androidx.preference.PreferenceManager
+import androidx.core.content.ContextCompat
 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 com.google.firebase.crashlytics.FirebaseCrashlytics
+import com.google.mlkit.vision.face.Face
+import com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller
 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.android.synthetic.main.reader_eye_card.view.*
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import kotlinx.serialization.ImplicitReflectionSerializer
-import xyz.quaver.pupil.Pupil
+import xyz.quaver.Code
 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.favorites
+import xyz.quaver.pupil.services.DownloadService
+import xyz.quaver.pupil.util.Preferences
+import xyz.quaver.pupil.util.camera
+import xyz.quaver.pupil.util.closeCamera
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.downloader.DownloadManager
+import xyz.quaver.pupil.util.startCamera
 
-class ReaderActivity : AppCompatActivity() {
+class ReaderActivity : BaseActivity() {
 
     private var galleryID = 0
-    private val images = ArrayList<String>()
-    private var gallerySize = 0
     private var currentPage = 0
 
     private var isScroll = true
@@ -64,50 +76,66 @@ class ReaderActivity : AppCompatActivity() {
         field = value
 
         (reader_recyclerview.adapter as ReaderAdapter).isFullScreen = value
+    }
 
-        reader_progressbar.visibility = when {
-            value -> View.VISIBLE
-            else -> View.GONE
+    private lateinit var cache: Cache
+    var downloader: DownloadService? = null
+    private val conn = object: ServiceConnection {
+        override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
+            downloader = (service as DownloadService.Binder).service.also {
+                it.priority = 0
+
+                if (!it.progress.containsKey(galleryID))
+                    DownloadService.download(this@ReaderActivity, galleryID, true)
+            }
+        }
+
+        override fun onServiceDisconnected(name: ComponentName?) {
+            downloader = null
         }
     }
 
-    private lateinit var downloader: GalleryDownloader
-
     private val snapHelper = PagerSnapHelper()
-
     private var menu: Menu? = null
 
-    private lateinit var favorites: Histories
+    private val requestPermissionLauncher = registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted ->
+        if (isGranted)
+            toggleCamera()
+        else
+            AlertDialog.Builder(this)
+                .setTitle(R.string.error)
+                .setMessage(R.string.camera_denied)
+                .setPositiveButton(android.R.string.ok) { _, _ ->}
+                .show()
+    }
+
+    enum class Eye {
+        LEFT,
+        RIGHT
+    }
+
+    private var cameraEnabled = false
+    private var eyeType: Eye? = null
+    private var eyeTime: Long = 0L
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_reader)
 
         title = getString(R.string.reader_loading)
         supportActionBar?.setDisplayHomeAsUpEnabled(false)
 
-        favorites = (application as Pupil).favorites
-
-        window.setFlags(
-            WindowManager.LayoutParams.FLAG_SECURE,
-            WindowManager.LayoutParams.FLAG_SECURE)
-
-        setContentView(R.layout.activity_reader)
-
         handleIntent(intent)
-
-        Crashlytics.setInt("GalleryID", galleryID)
+        cache = Cache.getInstance(this, galleryID)
+        FirebaseCrashlytics.getInstance().setCustomKey("GalleryID", galleryID)
 
         if (galleryID == 0) {
             onBackPressed()
             return
         }
 
-        initDownloader()
-
+        initDownloadListener()
         initView()
-
-        if (!downloader.download)
-            downloader.start()
     }
 
     override fun onNewIntent(intent: Intent) {
@@ -120,14 +148,12 @@ class ReaderActivity : AppCompatActivity() {
             val uri = intent.data
             val lastPathSegment = uri?.lastPathSegment
             if (uri != null && lastPathSegment != null) {
-                val nonNumber = Regex("[^-?0-9]+")
-
                 galleryID = when (uri.host) {
-                    "hitomi.la" -> lastPathSegment.replace(nonNumber, "").toInt()
-                    "히요비.asia" -> lastPathSegment.toInt()
-                    "xn--9w3b15m8vo.asia" -> lastPathSegment.toInt()
+                    "hitomi.la" ->
+                        Regex("([0-9]+).html").find(lastPathSegment)?.groupValues?.get(1)?.toIntOrNull() ?: 0
+                    "hiyobi.me" -> lastPathSegment.toInt()
                     "e-hentai.org" -> uri.pathSegments[1].toInt()
-                    else -> return
+                    else -> 0
                 }
             }
         } else {
@@ -135,20 +161,6 @@ class ReaderActivity : AppCompatActivity() {
         }
     }
 
-    override fun onResume() {
-        val preferences = PreferenceManager.getDefaultSharedPreferences(this)
-
-        if (preferences.getBoolean("security_mode", false))
-            window.setFlags(
-                WindowManager.LayoutParams.FLAG_SECURE,
-                WindowManager.LayoutParams.FLAG_SECURE)
-        else
-            window.clearFlags(WindowManager.LayoutParams.FLAG_SECURE)
-
-        super.onResume()
-    }
-
-    @UseExperimental(ImplicitReflectionSerializer::class)
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {
         menuInflater.inflate(R.menu.reader, menu)
 
@@ -163,14 +175,14 @@ class ReaderActivity : AppCompatActivity() {
         return true
     }
 
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        when(item?.itemId) {
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when(item.itemId) {
             R.id.reader_menu_page_indicator -> {
-                val view = LayoutInflater.from(this).inflate(R.layout.dialog_numberpicker, findViewById(android.R.id.content), false)
+                val view = LayoutInflater.from(this).inflate(R.layout.dialog_numberpicker, reader_layout, false)
                 with(view.dialog_number_picker) {
-                    minValue=1
-                    maxValue=gallerySize
-                    value=currentPage
+                    minValue = 1
+                    maxValue = cache.metadata.reader?.galleryInfo?.files?.size ?: 0
+                    value = currentPage
                 }
                 val dialog = AlertDialog.Builder(this).apply {
                     setView(view)
@@ -199,11 +211,32 @@ class ReaderActivity : AppCompatActivity() {
         return true
     }
 
+    override fun onResume() {
+        super.onResume()
+
+        bindService(Intent(this, DownloadService::class.java), conn, BIND_AUTO_CREATE)
+
+        if (cameraEnabled)
+            startCamera(this, cameraCallback)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        closeCamera()
+
+        if (downloader != null)
+            unbindService(conn)
+
+        downloader?.priority = galleryID
+    }
+
     override fun onDestroy() {
         super.onDestroy()
 
-        if (::downloader.isInitialized && !downloader.download)
-            downloader.cancel()
+        update = false
+
+        if (!DownloadManager.getInstance(this).isDownloading(galleryID))
+            DownloadService.cancel(this, galleryID)
     }
 
     override fun onBackPressed() {
@@ -238,102 +271,78 @@ class ReaderActivity : AppCompatActivity() {
         }
     }
 
-    private fun initDownloader() {
-        var d: GalleryDownloader? = GalleryDownloader.get(galleryID)
+    private var update = true
+    private fun initDownloadListener() {
+        CoroutineScope(Dispatchers.Main).launch {
+            while (update) {
+                delay(1000)
 
-        if (d == null)
-            d = GalleryDownloader(this, galleryID)
+                val downloader = downloader ?: continue
 
-        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
-                    }
+                if (!downloader.progress.containsKey(galleryID))  //loading
+                    continue
 
-                    gallerySize = it.galleryInfo.size
-                    menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/${it.galleryInfo.size}"
+                if (downloader.progress[galleryID]?.isEmpty() == true) {      //Gallery not found
+                    update = false
+                    Snackbar
+                        .make(reader_layout, R.string.reader_failed_to_find_gallery, Snackbar.LENGTH_INDEFINITE)
+                        .show()
+
+                    return@launch
                 }
-            }
-            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)
-                                    }
-                            }
-                        })
+                reader_download_progressbar.max = reader_recyclerview.adapter?.itemCount ?: 0
+                reader_download_progressbar.progress =
+                    downloader.progress[galleryID]?.count { it.isInfinite() } ?: 0
 
-                        fab.setImageDrawable(icon)
-                        icon?.start()
-                    } else {
-                        runOnUiThread {
-                            fab.setImageResource(R.drawable.ic_download)
+                if (title == getString(R.string.reader_loading)) {
+                    val reader = cache.metadata.reader
+
+                    if (reader != null) {
+                        with(reader_recyclerview.adapter as ReaderAdapter) {
+                            this.reader = reader
+                            notifyDataSetChanged()
                         }
+
+                        title = reader.galleryInfo.title
+                        menu?.findItem(R.id.reader_menu_page_indicator)?.title =
+                            "$currentPage/${reader.galleryInfo.files.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 (downloader.download) {
-            downloader.invokeOnReaderLoaded()
-            downloader.invokeOnNotifyChanged()
+                if (downloader.isCompleted(galleryID)) {   //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(object: RecyclerView.OnScrollListener() {
                 override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
@@ -349,43 +358,53 @@ class ReaderActivity : AppCompatActivity() {
                     if (layoutManager.findFirstVisibleItemPosition() == -1)
                         return
                     currentPage = layoutManager.findFirstVisibleItemPosition()+1
-                    menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/$gallerySize"
-                    this@ReaderActivity.reader_progressbar.progress = currentPage
+                    menu?.findItem(R.id.reader_menu_page_indicator)?.title = "$currentPage/${recyclerView.adapter!!.itemCount}"
+
                 }
             })
-
-            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(DownloadManager.getInstance(this@ReaderActivity).getDownloadFolder(galleryID) != null) //If download in progress, animate button
+
             setOnClickListener {
+                val downloadManager = DownloadManager.getInstance(this@ReaderActivity)
 
-                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
+                if (downloadManager.isDownloading(galleryID)) {
+                    downloadManager.deleteDownloadFolder(galleryID)
+                    animateDownloadFAB(false)
+                } else {
+                    downloadManager.addDownloadFolder(galleryID)
+                    DownloadService.download(context, galleryID, true)
+                    animateDownloadFAB(true)
                 }
+            }
+        }
 
-                downloader.download = !downloader.download
+        with(reader_fab_retry) {
+            setImageResource(R.drawable.refresh)
+            setOnClickListener {
+                DownloadService.download(context, galleryID)
+            }
+        }
 
-                if (!downloader.download)
-                    downloader.clearNotification()
+        with(reader_fab_auto) {
+            setImageResource(R.drawable.eye_white)
+            setOnClickListener {
+                when {
+                    ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED -> {
+                        toggleCamera()
+                    }
+                    Build.VERSION.SDK_INT >= 23 && shouldShowRequestPermissionRationale(Manifest.permission.CAMERA) -> {
+                        AlertDialog.Builder(this@ReaderActivity)
+                            .setTitle(R.string.warning)
+                            .setMessage(R.string.camera_denied)
+                            .setPositiveButton(android.R.string.ok) { _, _ ->}
+                            .show()
+                    }
+                    else ->
+                        requestPermissionLauncher.launch(Manifest.permission.CAMERA)
+                }
             }
         }
 
@@ -406,14 +425,28 @@ class ReaderActivity : AppCompatActivity() {
                 flags = flags or WindowManager.LayoutParams.FLAG_FULLSCREEN
                 supportActionBar?.hide()
                 this@ReaderActivity.reader_fab.visibility = View.INVISIBLE
+                this@ReaderActivity.scroller.let {
+                    it.handleWidth = resources.getDimensionPixelSize(R.dimen.thumb_height)
+                    it.handleHeight = resources.getDimensionPixelSize(R.dimen.thumb_width)
+                    it.handleDrawable = ContextCompat.getDrawable(this@ReaderActivity, R.drawable.thumb_horizontal)
+                    it.fastScrollDirection = RecyclerViewFastScroller.FastScrollDirection.HORIZONTAL
+                }
             } else {
                 flags = flags and WindowManager.LayoutParams.FLAG_FULLSCREEN.inv()
                 supportActionBar?.show()
                 this@ReaderActivity.reader_fab.visibility = View.VISIBLE
+                this@ReaderActivity.scroller.let {
+                    it.handleWidth = resources.getDimensionPixelSize(R.dimen.thumb_width)
+                    it.handleHeight = resources.getDimensionPixelSize(R.dimen.thumb_height)
+                    it.handleDrawable = ContextCompat.getDrawable(this@ReaderActivity, R.drawable.thumb)
+                    it.fastScrollDirection = RecyclerViewFastScroller.FastScrollDirection.VERTICAL
+                }
             }
 
             window.attributes = this
         }
+
+        reader_recyclerview.adapter = reader_recyclerview.adapter   // Force to redraw
     }
 
     private fun scrollMode(isScroll: Boolean) {
@@ -422,9 +455,154 @@ class ReaderActivity : AppCompatActivity() {
             reader_recyclerview.layoutManager = LinearLayoutManager(this)
         } else {
             snapHelper.attachToRecyclerView(reader_recyclerview)
-            reader_recyclerview.layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false)
+            reader_recyclerview.layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, Preferences["rtl", false])
         }
 
         (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?) {
+                        if (downloader?.isCompleted(galleryID) == true) // If download is finished, stop animating
+                            post {
+                                setImageResource(R.drawable.ic_download)
+                                labelText = getString(R.string.reader_fab_download_cancel)
+                            }
+                        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)
+            }
+        }
+    }
+
+    val cameraCallback: (List<Face>) -> Unit = callback@{ faces ->
+        eye_card.dot.let {
+            it.visibility = View.VISIBLE
+            CoroutineScope(Dispatchers.Main).launch {
+                delay(50)
+                it.visibility = View.INVISIBLE
+            }
+        }
+
+        if (faces.size != 1)
+            ContextCompat.getDrawable(this, R.drawable.eye_off).let {
+                with(eye_card) {
+                    left_eye.setImageDrawable(it)
+                    right_eye.setImageDrawable(it)
+                }
+
+                return@callback
+            }
+
+        val (left, right) = Pair(
+            faces[0].rightEyeOpenProbability?.let { it > 0.4 } == true,
+            faces[0].leftEyeOpenProbability?.let { it > 0.4 } == true
+        )
+
+        with(eye_card) {
+            left_eye.setImageDrawable(
+                ContextCompat.getDrawable(
+                    context,
+                    if (left) R.drawable.eye else R.drawable.eye_closed
+                )
+            )
+            right_eye.setImageDrawable(
+                ContextCompat.getDrawable(
+                    context,
+                    if (right) R.drawable.eye else R.drawable.eye_closed
+                )
+            )
+        }
+
+        when {
+            // Both closed / opened
+            !left.xor(right) -> {
+                eyeType = null
+                eyeTime = 0L
+            }
+            !left -> {
+                if (eyeType != Eye.LEFT) {
+                    eyeType = Eye.LEFT
+                    eyeTime = System.currentTimeMillis()
+                }
+            }
+            !right -> {
+                if (eyeType != Eye.RIGHT) {
+                    eyeType = Eye.RIGHT
+                    eyeTime = System.currentTimeMillis()
+                }
+            }
+        }
+
+        if (eyeType != null && System.currentTimeMillis() - eyeTime > 100) {
+            (this@ReaderActivity.reader_recyclerview.layoutManager as LinearLayoutManager).let {
+                it.scrollToPositionWithOffset(when(eyeType!!) {
+                    Eye.RIGHT -> {
+                        if (it.reverseLayout) currentPage - 2 else currentPage
+                    }
+                    Eye.LEFT -> {
+                        if (it.reverseLayout) currentPage else currentPage - 2
+                    }
+                }, 0)
+            }
+
+            eyeTime = System.currentTimeMillis() + 500
+        }
+    }
+
+    private fun toggleCamera() {
+        val eyes = this@ReaderActivity.eye_card
+        when (camera) {
+            null -> {
+                reader_fab_auto.labelText = getString(R.string.reader_fab_auto_cancel)
+                reader_fab_auto.setImageResource(R.drawable.eye_off_white)
+                eyes.apply {
+                    visibility = View.VISIBLE
+                    TranslateAnimation(0F, 0F, -100F, 0F).apply {
+                        duration = 500
+                        fillAfter = false
+                        interpolator = OvershootInterpolator()
+                    }.let { startAnimation(it) }
+                }
+                startCamera(this, cameraCallback)
+                cameraEnabled = true
+            }
+            else -> {
+                reader_fab_auto.labelText = getString(R.string.reader_fab_auto)
+                reader_fab_auto.setImageResource(R.drawable.eye_white)
+                eyes.apply {
+                    TranslateAnimation(0F, 0F, 0F, -100F).apply {
+                        duration = 500
+                        fillAfter = false
+                        interpolator = AnticipateInterpolator()
+                        setAnimationListener(object: Animation.AnimationListener {
+                            override fun onAnimationStart(p0: Animation?) {}
+                            override fun onAnimationRepeat(p0: Animation?) {}
+
+                            override fun onAnimationEnd(p0: Animation?) {
+                                eyes.visibility = View.GONE
+                            }
+                        })
+                    }.let { startAnimation(it) }
+                }
+                closeCamera()
+                cameraEnabled = false
+            }
+        }
+    }
 }

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

@@ -18,51 +18,15 @@
 
 package xyz.quaver.pupil.ui
 
-import android.app.Activity
-import android.content.Intent
 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.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.parseList
-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 java.io.File
-import java.nio.charset.Charset
-import java.util.*
+import xyz.quaver.pupil.ui.fragment.SettingsFragment
 
-class SettingsActivity : AppCompatActivity() {
-
-    val REQUEST_LOCK = 38238
-    val REQUEST_RESTORE = 16546
+class SettingsActivity : BaseActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-
-        window.setFlags(
-            WindowManager.LayoutParams.FLAG_SECURE,
-            WindowManager.LayoutParams.FLAG_SECURE)
-
         setContentView(R.layout.settings_activity)
         supportFragmentManager
             .beginTransaction()
@@ -71,429 +35,11 @@ class SettingsActivity : AppCompatActivity() {
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
     }
 
-    override fun onResume() {
-        val preferences = PreferenceManager.getDefaultSharedPreferences(this)
-
-        if (preferences.getBoolean("security_mode", false))
-            window.setFlags(
-                WindowManager.LayoutParams.FLAG_SECURE,
-                WindowManager.LayoutParams.FLAG_SECURE)
-        else
-            window.clearFlags(WindowManager.LayoutParams.FLAG_SECURE)
-        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) {
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
             android.R.id.home -> onBackPressed()
         }
 
         return true
     }
-
-    @UseExperimental(ImplicitReflectionSerializer::class)
-    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-        when(requestCode) {
-            REQUEST_LOCK -> {
-                if (resultCode == Activity.RESULT_OK) {
-                    supportFragmentManager
-                        .beginTransaction()
-                        .replace(R.id.settings, LockFragment())
-                        .addToBackStack("Lock")
-                        .commitAllowingStateLoss()
-                }
-            }
-            REQUEST_RESTORE -> {
-                if (resultCode == Activity.RESULT_OK) {
-                    val uri = data?.data ?: return
-
-                    try {
-                        val json = contentResolver.openInputStream(uri).use { inputStream ->
-                            inputStream!!
-
-                            inputStream.readBytes().toString(Charset.defaultCharset())
-                        }
-
-                        (application as Pupil).favorites.addAll(Json.parseList<Int>(json).also {
-                            Snackbar.make(
-                                window.decorView,
-                                getString(R.string.settings_restore_successful, it.size),
-                                Snackbar.LENGTH_LONG
-                            ).show()
-                        })
-                    } catch (e: Exception) {
-                        Snackbar.make(
-                            window.decorView,
-                            R.string.settings_restore_failed,
-                            Snackbar.LENGTH_LONG
-                        ).show()
-                    }
-                }
-            }
-            else -> super.onActivityResult(requestCode, resultCode, data)
-        }
-    }
 }

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

@@ -0,0 +1,165 @@
+/*
+ *     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 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
+import xyz.quaver.pupil.util.Preferences
+
+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 val excludeLoli = listOf("-female:loli", "-male:shota")
+
+    var onPositiveButtonClickListener : ((Tags) -> (Unit))? = null
+
+    @SuppressLint("InflateParams")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        setTitle(R.string.default_query_dialog_title)
+        setView(build())
+        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)
+                }
+
+            if (default_query_dialog_loli_checkbox.isChecked)
+                excludeLoli.forEach { tag ->
+                    newTags.add(tag)
+                }
+
+            onPositiveButtonClickListener?.invoke(newTags)
+        }
+
+        super.onCreate(savedInstanceState)
+    }
+
+    @SuppressLint("InflateParams")
+    private fun build() : View {
+        val tags = Tags.parse(
+            Preferences["default_query"]
+        )
+
+        val view = LayoutInflater.from(context).inflate(R.layout.dialog_default_query, null)
+
+        with(view.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(view.default_query_dialog_BL_checkbox) {
+            isChecked = tags.contains(excludeBL)
+            if (tags.contains(excludeBL))
+                tags.remove(excludeBL)
+        }
+
+        with(view.default_query_dialog_guro_checkbox) {
+            isChecked = excludeGuro.all { tags.contains(it) }
+            if (excludeGuro.all { tags.contains(it) })
+                excludeGuro.forEach {
+                    tags.remove(it)
+                }
+        }
+
+        with(view.default_query_dialog_loli_checkbox) {
+            isChecked = excludeLoli.all { tags.contains(it) }
+            if (excludeLoli.all { tags.contains(it) })
+                excludeLoli.forEach {
+                    tags.remove(it)
+                }
+        }
+
+        with(view.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())
+                        )
+                }
+            })
+        }
+
+        return view
+    }
+
+}

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

@@ -0,0 +1,74 @@
+/*
+ *     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.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.widget.addTextChangedListener
+import androidx.fragment.app.DialogFragment
+import com.google.android.material.snackbar.Snackbar
+import kotlinx.android.synthetic.main.dialog_download_folder_name.view.*
+import kotlinx.coroutines.runBlocking
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.util.Preferences
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.formatDownloadFolder
+import xyz.quaver.pupil.util.formatDownloadFolderTest
+import xyz.quaver.pupil.util.formatMap
+
+class DownloadFolderNameDialogFragment : DialogFragment() {
+
+    @SuppressLint("InflateParams")
+    private fun build(): View {
+        val galleryID = Cache.instances.let { if (it.size == 0) 1199708 else it.keys.elementAt((0 until it.size).random()) }
+        val galleryBlock = runBlocking {
+            Cache.getInstance(requireContext(), galleryID).getGalleryBlock()
+        }
+
+        return layoutInflater.inflate(R.layout.dialog_download_folder_name, null).apply {
+            message.text = getString(R.string.settings_download_folder_name_message, formatMap.keys.toString(), galleryBlock?.formatDownloadFolder() ?: "")
+            edittext.setText(Preferences["download_folder_name", "[-id-] -title-"])
+            edittext.addTextChangedListener {
+                message.text = getString(R.string.settings_download_folder_name_message, formatMap.keys.toString(), galleryBlock?.formatDownloadFolderTest(it.toString()) ?: "")
+            }
+            ok_button.setOnClickListener {
+                val newValue = edittext.text.toString()
+
+                if ((newValue as? String)?.contains("/") != false) {
+                    Snackbar.make(this, R.string.settings_invalid_download_folder_name, Snackbar.LENGTH_SHORT).show()
+                    return@setOnClickListener
+                }
+
+                Preferences["download_folder_name"] = edittext.text.toString()
+
+                dismiss()
+            }
+        }
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog =
+       Dialog(requireContext()).apply {
+           setContentView(build())
+           window?.attributes?.width = ViewGroup.LayoutParams.MATCH_PARENT
+       }
+
+}

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

@@ -0,0 +1,196 @@
+/*
+ *     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.Activity
+import android.app.Dialog
+import android.content.Intent
+import android.os.Build
+import android.os.Bundle
+import android.view.View
+import android.widget.LinearLayout
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AlertDialog
+import androidx.core.content.ContextCompat
+import androidx.core.net.toUri
+import androidx.fragment.app.DialogFragment
+import com.google.android.material.snackbar.Snackbar
+import kotlinx.android.synthetic.main.dialog_download_folder_name.view.*
+import kotlinx.android.synthetic.main.item_download_folder.view.*
+import net.rdrei.android.dirchooser.DirectoryChooserActivity
+import net.rdrei.android.dirchooser.DirectoryChooserConfig
+import xyz.quaver.io.FileX
+import xyz.quaver.io.util.toFile
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.util.Preferences
+import xyz.quaver.pupil.util.byteToString
+import xyz.quaver.pupil.util.downloader.DownloadManager
+import xyz.quaver.pupil.util.migrate
+import java.io.File
+
+class DownloadLocationDialogFragment : DialogFragment() {
+    private val entries = mutableMapOf<File?, View>()
+
+    private val requestDownloadFolderLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+        if (it.resultCode == Activity.RESULT_OK) {
+            val activity = activity ?: return@registerForActivityResult
+            val context = context ?: return@registerForActivityResult
+            val dialog = dialog ?: return@registerForActivityResult
+
+            it.data?.data?.also { uri ->
+                val takeFlags: Int =
+                    activity.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)
+                    context.contentResolver.takePersistableUriPermission(uri, takeFlags)
+
+                if (kotlin.runCatching { FileX(context, uri).canWrite() }.getOrDefault(false)) {
+                    entries[null]?.location_available?.text = uri.toFile(context)?.canonicalPath
+                    Preferences["download_folder"] = uri.toString()
+                } else {
+                    Snackbar.make(
+                        dialog.window!!.decorView.rootView,
+                        R.string.settings_download_folder_not_writable,
+                        Snackbar.LENGTH_LONG
+                    ).show()
+
+                    val downloadFolder = DownloadManager.getInstance(context).downloadFolder.canonicalPath
+                    val key = entries.keys.firstOrNull { it?.canonicalPath == downloadFolder }
+                    entries[key]!!.button.isChecked = true
+                    if (key == null) entries[key]!!.location_available.text = downloadFolder
+                }
+            }
+        }
+    }
+
+    private val requestDownloadFolderOldLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+        val context = context ?: return@registerForActivityResult
+        val dialog = dialog ?: return@registerForActivityResult
+
+        if (it.resultCode == DirectoryChooserActivity.RESULT_CODE_DIR_SELECTED) {
+            val directory = it.data?.getStringExtra(DirectoryChooserActivity.RESULT_SELECTED_DIR)!!
+
+            if (!File(directory).canWrite()) {
+                Snackbar.make(
+                    dialog.window!!.decorView.rootView,
+                    R.string.settings_download_folder_not_writable,
+                    Snackbar.LENGTH_LONG
+                ).show()
+
+                val downloadFolder = DownloadManager.getInstance(context).downloadFolder.canonicalPath
+                val key = entries.keys.firstOrNull { it?.canonicalPath == downloadFolder }
+                entries[key]!!.button.isChecked = true
+                if (key == null) entries[key]!!.location_available.text = downloadFolder
+            }
+            else {
+                entries[null]?.location_available?.text = directory
+                Preferences["download_folder"] = File(directory).toURI().toString()
+            }
+        }
+    }
+
+    @SuppressLint("InflateParams")
+    private fun build() : View? {
+        val context = context ?: return null
+
+        val view = layoutInflater.inflate(R.layout.dialog_download_folder, null) as LinearLayout
+
+        val externalFilesDirs = ContextCompat.getExternalFilesDirs(context, null)
+
+        externalFilesDirs.forEachIndexed { index, dir ->
+            dir ?: return@forEachIndexed
+
+            view.addView(layoutInflater.inflate(R.layout.item_download_folder, view, false).apply {
+                location_type.text = context.getString(when (index) {
+                    0 -> R.string.settings_download_folder_internal
+                    else -> R.string.settings_download_folder_removable
+                })
+                location_available.text = context.getString(
+                    R.string.settings_download_folder_available,
+                    byteToString(dir.freeSpace)
+                )
+                setOnClickListener {
+                    entries.values.forEach {
+                        it.button.isChecked = false
+                    }
+                    button.performClick()
+                    Preferences["download_folder"] = dir.toUri().toString()
+                }
+                entries[dir] = this
+            })
+        }
+
+        view.addView(layoutInflater.inflate(R.layout.item_download_folder, view, false).apply {
+            location_type.text = context.getString(R.string.settings_download_folder_custom)
+            setOnClickListener {
+                entries.values.forEach {
+                    it.button.isChecked = false
+                }
+                button.performClick()
+
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                    val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
+                        putExtra("android.content.extra.SHOW_ADVANCED", true)
+                    }
+
+                    requestDownloadFolderLauncher.launch(intent)
+                } 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)
+                    }
+
+                    requestDownloadFolderOldLauncher.launch(intent)
+                }
+            }
+            entries[null] = this
+        })
+
+        val downloadFolder = DownloadManager.getInstance(context).downloadFolder.canonicalPath
+        val key = entries.keys.firstOrNull { it?.canonicalPath == downloadFolder }
+        entries[key]!!.button.isChecked = true
+        if (key == null) entries[key]!!.location_available.text = downloadFolder
+
+        return view
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val builder = AlertDialog.Builder(requireContext())
+
+        builder
+            .setTitle(R.string.settings_download_folder)
+            .setView(build())
+            .setPositiveButton(requireContext().getText(android.R.string.ok)) { _, _ ->
+                if (Preferences["download_folder", ""].isEmpty())
+                    Preferences["download_folder"] = context?.getExternalFilesDir(null)?.toUri()?.toString() ?: ""
+
+                DownloadManager.getInstance(requireContext()).migrate()
+            }
+
+        isCancelable = false
+
+        return builder.create()
+    }
+}

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
@@ -16,54 +16,53 @@
  *     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
 import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
+import android.view.ViewGroup
 import android.widget.LinearLayout.LayoutParams
+import androidx.appcompat.app.AlertDialog
 import androidx.core.content.ContextCompat
-import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import com.bumptech.glide.Glide
-import com.google.android.material.chip.Chip
+import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.snackbar.Snackbar
-import kotlinx.android.synthetic.main.dialog_galleryblock.*
-import kotlinx.android.synthetic.main.gallery_details.view.*
+import kotlinx.android.synthetic.main.dialog_gallery.*
+import kotlinx.android.synthetic.main.dialog_gallery_details.view.*
+import kotlinx.android.synthetic.main.dialog_gallery_dotindicator.view.*
 import kotlinx.android.synthetic.main.item_gallery_details.view.*
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 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.adapters.ThumbnailPageAdapter
+import xyz.quaver.pupil.favoriteTags
+import xyz.quaver.pupil.histories
 import xyz.quaver.pupil.types.Tag
+import xyz.quaver.pupil.ui.ReaderActivity
+import xyz.quaver.pupil.ui.view.TagChip
 import xyz.quaver.pupil.util.ItemClickSupport
+import xyz.quaver.pupil.util.downloader.Cache
 import xyz.quaver.pupil.util.wordCapitalize
+import java.util.*
+import kotlin.collections.ArrayList
 
-class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(context) {
-
-    private val languages = context.resources.getStringArray(R.array.languages).map {
-        it.split("|").let { split ->
-            Pair(split[0], split[1])
-        }
-    }.toMap()
-
-    private val glide = Glide.with(context)
+class GalleryDialog(context: Context, private val galleryID: Int) : AlertDialog(context) {
 
     val onChipClickedHandler = ArrayList<((Tag) -> (Unit))>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.dialog_galleryblock)
+        setContentView(R.layout.dialog_gallery)
 
         window?.attributes.apply {
             this ?: return@apply
@@ -78,7 +77,6 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
                 context.startActivity(Intent(context, ReaderActivity::class.java).apply {
                     putExtra("galleryID", galleryID)
                 })
-                (context.applicationContext as Pupil).histories.add(galleryID)
             }
         }
 
@@ -86,7 +84,7 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
             try {
                 val gallery = getGallery(galleryID)
 
-                launch(Dispatchers.Main) {
+                gallery_cover.post {
                     gallery_progressbar.visibility = View.GONE
                     gallery_title.text = gallery.title
                     gallery_artist.text = gallery.artists.joinToString(", ") { it.wordCapitalize() }
@@ -108,19 +106,19 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
                         }
                     }
 
-                    Glide.with(context)
-                        .load(gallery.cover)
-                        .apply {
-                            if (BuildConfig.CENSOR)
-                                override(5, 8)
-                        }.into(gallery_cover)
+                    gallery_cover.showImage(Uri.parse(gallery.cover))
 
                     addDetails(gallery)
                     addThumbnails(gallery)
                     addRelated(gallery)
                 }
             } catch (e: Exception) {
-                Snackbar.make(gallery_layout, R.string.unable_to_connect, Snackbar.LENGTH_INDEFINITE).show()
+                Snackbar.make(gallery_layout, R.string.unable_to_connect, Snackbar.LENGTH_INDEFINITE).apply {
+                    if (Locale.getDefault().language == "ko")
+                        setAction(context.getText(R.string.https_text)) {
+                            context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(context.getString(R.string.https))))
+                        }
+                }.show()
             }
         }
     }
@@ -128,7 +126,7 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
     private fun addDetails(gallery: Gallery) {
         val inflater = LayoutInflater.from(context)
 
-        inflater.inflate(R.layout.gallery_details, gallery_contents, false).apply {
+        inflater.inflate(R.layout.dialog_gallery_details, gallery_contents, false).apply {
             gallery_details.setText(R.string.gallery_details)
 
             listOf(
@@ -145,7 +143,18 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
                     listOf(gallery.language).map { Tag("language", it) },
                     gallery.series.map { Tag("series", it) },
                     gallery.characters.map { Tag("character", it) },
-                    gallery.tags.map {
+                    gallery.tags.sortedBy {
+                        val tag = Tag.parse(it)
+
+                        if (favoriteTags.contains(tag))
+                            -1
+                        else
+                            when(Tag.parse(it).area) {
+                                "female" -> 0
+                                "male" -> 1
+                                else -> 2
+                            }
+                    }.map {
                         Tag.parse(it).let { tag ->
                             when {
                                 tag.area != null -> tag
@@ -162,26 +171,7 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
 
                     content.forEach { tag ->
                         gallery_details_tags.addView(
-                            Chip(context).apply {
-                                chipIcon = when(tag.area) {
-                                    "male" -> {
-                                        setChipBackgroundColorResource(R.color.material_blue_700)
-                                        setTextColor(ContextCompat.getColor(context, android.R.color.white))
-                                        ContextCompat.getDrawable(context, R.drawable.ic_gender_male_white)
-                                    }
-                                    "female" -> {
-                                        setChipBackgroundColorResource(R.color.material_pink_600)
-                                        setTextColor(ContextCompat.getColor(context, android.R.color.white))
-                                        ContextCompat.getDrawable(context, R.drawable.ic_gender_female_white)
-                                    }
-                                    else -> null
-                                }
-
-                                text = when (tag.area) {
-                                    "language" -> languages[tag.tag]
-                                    else -> tag.tag.wordCapitalize()
-                                }
-
+                            TagChip(context, tag).apply {
                                 setOnClickListener {
                                     onChipClickedHandler.forEach { handler ->
                                         handler.invoke(tag)
@@ -202,15 +192,22 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
     private fun addThumbnails(gallery: Gallery) {
         val inflater = LayoutInflater.from(context)
 
-        inflater.inflate(R.layout.gallery_details, gallery_contents, false).apply {
+        inflater.inflate(R.layout.dialog_gallery_details, gallery_contents, false).apply {
             gallery_details.setText(R.string.gallery_thumbnails)
 
-            RecyclerView(context).apply {
-                layoutManager = GridLayoutManager(context, 3)
-                adapter = ThumbnailAdapter(glide, gallery.thumbnails)
-            }.let {
-                gallery_details_contents.addView(it, LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT))
+            val pager = ViewPager2(context).apply {
+                adapter = ThumbnailPageAdapter(gallery.thumbnails)
+                layoutParams = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)
             }
+
+            gallery_details_contents.addView(
+                pager,
+                LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)
+            )
+
+            LayoutInflater.from(context).inflate(R.layout.dialog_gallery_dotindicator, gallery_details_contents)
+
+            gallery_dotindicator.setViewPager2(pager)
         }.let {
             gallery_contents.addView(it)
         }
@@ -218,9 +215,9 @@ 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<Int>()
 
-        val adapter = GalleryBlockAdapter(glide, galleries).apply {
+        val adapter = GalleryBlockAdapter(galleries).apply {
             onChipClickedHandler.add { tag ->
                 this@GalleryDialog.onChipClickedHandler.forEach { handler ->
                     handler.invoke(tag)
@@ -228,35 +225,21 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
             }
         }
 
-        CoroutineScope(Dispatchers.Main).launch {
-            gallery.related.forEachIndexed { i, galleryID ->
-                async(Dispatchers.IO) {
-                    getGalleryBlock(galleryID)
-                }.let {
-                    val galleryBlock = it.await() ?: return@let
-
-                    galleries.add(Pair(galleryBlock, GlobalScope.async { galleryBlock.thumbnails.first() }))
-                    adapter.notifyItemInserted(i)
-                }
-            }
-        }
-
-        inflater.inflate(R.layout.gallery_details, gallery_contents, false).apply {
+        inflater.inflate(R.layout.dialog_gallery_details, gallery_contents, false).apply {
             gallery_details.setText(R.string.gallery_related)
 
             RecyclerView(context).apply {
                 layoutManager = LinearLayoutManager(context)
                 this.adapter = adapter
 
-                ItemClickSupport.addTo(this)
-                    .setOnItemClickListener { _, position, _ ->
+                ItemClickSupport.addTo(this).apply {
+                    onItemClickListener = { _, position, _ ->
                         context.startActivity(Intent(context, ReaderActivity::class.java).apply {
-                            putExtra("galleryID", galleries[position].first.id)
+                            putExtra("galleryID", galleries[position])
                         })
-                        (context.applicationContext as Pupil).histories.add(galleries[position].first.id)
                     }
-                    .setOnItemLongClickListener { _, position, _ ->
-                        GalleryDialog(context, galleries[position].first.id).apply {
+                    onItemLongClickListener = { _, position, _ ->
+                        GalleryDialog(context, galleries[position]).apply {
                             onChipClickedHandler.add { tag ->
                                 this@GalleryDialog.onChipClickedHandler.forEach { it.invoke(tag) }
                             }
@@ -264,12 +247,25 @@ class GalleryDialog(context: Context, private val galleryID: Int) : Dialog(conte
 
                         true
                     }
+                }
             }.let {
                 gallery_details_contents.addView(it, LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT))
             }
         }.let {
             gallery_contents.addView(it)
         }
+
+        CoroutineScope(Dispatchers.IO).launch {
+            gallery.related.forEach { galleryID ->
+                Cache.getInstance(context, galleryID).getGalleryBlock()?.let {
+                    galleries.add(galleryID)
+                }
+            }
+
+            withContext(Dispatchers.Main) {
+                adapter.notifyDataSetChanged()
+            }
+        }
     }
 
 }

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

@@ -0,0 +1,91 @@
+/*
+ *     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.view.View
+import androidx.appcompat.app.AlertDialog
+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
+import xyz.quaver.pupil.util.Preferences
+
+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) {
+
+        }
+    }
+
+    @SuppressLint("InflateParams")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        setTitle(R.string.settings_mirror_title)
+        setView(build())
+        setButton(Dialog.BUTTON_POSITIVE, context.getString(android.R.string.ok)) { _, _ -> }
+
+        super.onCreate(savedInstanceState)
+    }
+
+    private fun build() : View {
+        return 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 = {
+                    Preferences["mirrors"] = it.joinToString(">")
+                }
+            }
+        }
+    }
+
+}

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

@@ -0,0 +1,133 @@
+/*
+ *     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.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import androidx.appcompat.app.AlertDialog
+import kotlinx.android.synthetic.main.dialog_proxy.view.*
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.client
+import xyz.quaver.pupil.clientBuilder
+import xyz.quaver.pupil.clientHolder
+import xyz.quaver.pupil.util.Preferences
+import xyz.quaver.pupil.util.ProxyInfo
+import xyz.quaver.pupil.util.getProxyInfo
+import xyz.quaver.pupil.util.proxyInfo
+import java.net.Proxy
+
+class ProxyDialog(context: Context) : AlertDialog(context) {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        setView(build())
+
+        super.onCreate(savedInstanceState)
+    }
+
+    @SuppressLint("InflateParams")
+    private fun build() : View {
+        val proxyInfo = getProxyInfo()
+
+        val view = LayoutInflater.from(context).inflate(R.layout.dialog_proxy, null)
+
+        val enabler = { enable: Boolean ->
+            view?.proxy_addr?.isEnabled = enable
+            view?.proxy_port?.isEnabled = enable
+            view?.proxy_username?.isEnabled = enable
+            view?.proxy_password?.isEnabled = enable
+
+            if (!enable) {
+                view?.proxy_addr?.text = null
+                view?.proxy_port?.text = null
+                view?.proxy_username?.text = null
+                view?.proxy_password?.text = null
+            }
+        }
+
+        with(view.proxy_type_selector) {
+            adapter = ArrayAdapter(
+                context,
+                android.R.layout.simple_spinner_dropdown_item,
+                context.resources.getStringArray(R.array.proxy_type)
+            )
+
+            setSelection(proxyInfo.type.ordinal)
+
+            onItemSelectedListener = object: AdapterView.OnItemSelectedListener {
+                override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
+                    enabler.invoke(position != 0)
+                }
+
+                override fun onNothingSelected(parent: AdapterView<*>?) {}
+            }
+        }
+
+        view.proxy_addr.setText(proxyInfo.host)
+        view.proxy_port.setText(proxyInfo.port?.toString())
+        view.proxy_username.setText(proxyInfo.username)
+        view.proxy_password.setText(proxyInfo.password)
+
+        enabler.invoke(proxyInfo.type != Proxy.Type.DIRECT)
+
+        view.proxy_cancel.setOnClickListener {
+            dismiss()
+        }
+
+        view.proxy_ok.setOnClickListener {
+            val type = Proxy.Type.values()[view.proxy_type_selector.selectedItemPosition]
+            val addr = view.proxy_addr.text?.toString()
+            val port = view.proxy_port.text?.toString()?.toIntOrNull()
+            val username = view.proxy_username.text?.toString()
+            val password = view.proxy_password.text?.toString()
+
+            if (type != Proxy.Type.DIRECT) {
+                if (addr == null || addr.isEmpty())
+                    view.proxy_addr.error = context.getText(R.string.proxy_dialog_error)
+                if (port == null)
+                    view.proxy_port.error = context.getText(R.string.proxy_dialog_error)
+
+                if (addr == null || addr.isEmpty() || port == null)
+                    return@setOnClickListener
+            }
+
+            ProxyInfo(type, addr, port, username, password).let {
+                Preferences["proxy"] = Json.encodeToString(it)
+
+                clientBuilder
+                    .proxyInfo(it)
+                clientHolder = null
+                client
+            }
+
+            dismiss()
+        }
+
+        return view
+    }
+
+}

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

@@ -0,0 +1,146 @@
+/*
+ *     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 android.widget.Toast
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.SwitchPreferenceCompat
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.LockActivity
+import xyz.quaver.pupil.util.Lock
+import xyz.quaver.pupil.util.LockManager
+import xyz.quaver.pupil.util.Preferences
+
+class LockSettingsFragment : PreferenceFragmentCompat() {
+
+    override fun onResume() {
+        super.onResume()
+
+        val lockManager = LockManager(requireContext())
+
+        findPreference<Preference>("lock_pattern")?.summary =
+            if (lockManager.contains(Lock.Type.PATTERN))
+                getString(R.string.settings_lock_enabled)
+            else
+                ""
+
+        findPreference<Preference>("lock_pin")?.summary =
+            if (lockManager.contains(Lock.Type.PIN))
+                getString(R.string.settings_lock_enabled)
+            else
+                ""
+
+        if (lockManager.isEmpty()) {
+            (findPreference<Preference>("lock_fingerprint") as SwitchPreferenceCompat).isChecked = false
+
+            Preferences["lock_fingerprint"] = false
+        }
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.lock_preferences, rootKey)
+
+        with(findPreference<Preference>("lock_pattern")) {
+            this!!
+
+            if (LockManager(requireContext()).contains(Lock.Type.PATTERN))
+                summary = getString(R.string.settings_lock_enabled)
+
+            onPreferenceClickListener = Preference.OnPreferenceClickListener {
+                val lockManager = LockManager(requireContext())
+
+                if (lockManager.contains(Lock.Type.PATTERN)) {
+                    AlertDialog.Builder(requireContext()).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_lock_remove_message)
+
+                        setPositiveButton(android.R.string.ok) { _, _ ->
+                            lockManager.remove(Lock.Type.PATTERN)
+                            onResume()
+                        }
+                        setNegativeButton(android.R.string.cancel) { _, _ -> }
+                    }.show()
+                } else {
+                    val intent = Intent(requireContext(), LockActivity::class.java).apply {
+                        putExtra("mode", "add_lock")
+                        putExtra("type", "pattern")
+                    }
+
+                    startActivity(intent)
+                }
+
+                true
+            }
+        }
+
+        with(findPreference<Preference>("lock_pin")) {
+            this!!
+
+            if (LockManager(requireContext()).contains(Lock.Type.PIN))
+                summary = getString(R.string.settings_lock_enabled)
+
+            onPreferenceClickListener = Preference.OnPreferenceClickListener {
+                val lockManager = LockManager(requireContext())
+
+                if (lockManager.contains(Lock.Type.PIN)) {
+                    AlertDialog.Builder(requireContext()).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_lock_remove_message)
+
+                        setPositiveButton(android.R.string.ok) { _, _ ->
+                            lockManager.remove(Lock.Type.PIN)
+                            onResume()
+                        }
+                        setNegativeButton(android.R.string.cancel) { _, _ -> }
+                    }.show()
+                } else {
+                    val intent = Intent(requireContext(), LockActivity::class.java).apply {
+                        putExtra("mode", "add_lock")
+                        putExtra("type", "pin")
+                    }
+
+                    startActivity(intent)
+                }
+
+                true
+            }
+        }
+
+        with(findPreference<Preference>("lock_fingerprint")) {
+            this!!
+
+            setOnPreferenceChangeListener { _, newValue ->
+                this as SwitchPreferenceCompat
+
+                if (newValue == true && LockManager(requireContext()).isEmpty()) {
+                    isChecked = false
+
+                    Toast.makeText(requireContext(), R.string.settings_lock_fingerprint_without_lock, Toast.LENGTH_SHORT).show()
+                } else
+                    isChecked = newValue as Boolean
+
+                false
+            }
+        }
+    }
+}

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

@@ -0,0 +1,106 @@
+/*
+ *     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 android.widget.EditText
+import android.widget.TextView
+import androidx.appcompat.app.AlertDialog
+import androidx.core.content.ContextCompat
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import com.google.android.material.snackbar.Snackbar
+import okhttp3.*
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.client
+import xyz.quaver.pupil.favorites
+import xyz.quaver.pupil.util.restore
+import java.io.File
+import java.io.IOException
+
+class ManageFavoritesFragment : PreferenceFragmentCompat() {
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.manage_favorites_preferences, rootKey)
+
+        initPreferences()
+    }
+
+    private fun initPreferences() {
+        val context = context ?: return
+
+        findPreference<Preference>("backup")?.setOnPreferenceClickListener {
+            val request = Request.Builder()
+                .url(context.getString(R.string.backup_url))
+                .post(
+                    FormBody.Builder()
+                        .add("f:1", File(ContextCompat.getDataDir(context), "favorites.json").readText())
+                        .build()
+                ).build()
+
+            client.newCall(request).enqueue(object: Callback {
+                override fun onFailure(call: Call, e: IOException) {
+                    val view = view ?: return
+                    Snackbar.make(view, R.string.settings_backup_failed, Snackbar.LENGTH_LONG).show()
+                }
+
+                override fun onResponse(call: Call, response: Response) {
+                    if (response.code() != 200) {
+                        response.close()
+                        return
+                    }
+
+                    Intent(Intent.ACTION_SEND).apply {
+                        type = "text/plain"
+                        putExtra(Intent.EXTRA_TEXT, response.body()?.use { it.string() }?.replace("\n", ""))
+                    }.let {
+                        getContext()?.startActivity(Intent.createChooser(it, getString(R.string.settings_backup_share)))
+                    }
+                }
+            })
+
+            true
+        }
+        findPreference<Preference>("restore")?.setOnPreferenceClickListener {
+            val editText = EditText(context).apply {
+                setText(context.getString(R.string.backup_url), TextView.BufferType.EDITABLE)
+            }
+
+            AlertDialog.Builder(context)
+                .setTitle(R.string.settings_restore_title)
+                .setView(editText)
+                .setPositiveButton(android.R.string.ok) { _, _ ->
+                    restore(editText.text.toString(),
+                        onFailure = onFailure@{
+                            val view = view ?: return@onFailure
+                            Snackbar.make(view, R.string.settings_restore_failed, Snackbar.LENGTH_LONG).show()
+                        }, onSuccess = onSuccess@{
+                            val view = view ?: return@onSuccess
+                            Snackbar.make(view, context.getString(R.string.settings_restore_success, it.size), Snackbar.LENGTH_LONG).show()
+                        })
+                }.setNegativeButton(android.R.string.cancel) { _, _ ->
+                    // Do Nothing
+                }.show()
+
+            true
+        }
+    }
+
+}

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

@@ -0,0 +1,196 @@
+/*
+ *     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.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import xyz.quaver.io.FileX
+import xyz.quaver.io.util.deleteRecursively
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.histories
+import xyz.quaver.pupil.util.byteToString
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.downloader.DownloadManager
+import java.io.File
+
+class ManageStorageFragment : PreferenceFragmentCompat(), Preference.OnPreferenceClickListener {
+
+    private var job: Job? = null
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.manage_storage_preferences, rootKey)
+
+        initPreferences()
+    }
+
+    override fun onPreferenceClick(preference: Preference?): Boolean {
+        val context = context ?: return false
+
+        with(preference) {
+            this ?: return false
+
+            when (key) {
+                "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.ok) { _, _ ->
+                            if (dir.exists())
+                                dir.deleteRecursively()
+
+                            Cache.instances.clear()
+
+                            summary = context.getString(R.string.settings_storage_usage, byteToString(0))
+                            CoroutineScope(Dispatchers.IO).launch {
+                                var size = 0L
+
+                                dir.walk().forEach {
+                                    size += it.length()
+
+                                    launch(Dispatchers.Main) {
+                                        summary = context.getString(R.string.settings_storage_usage, byteToString(size))
+                                    }
+                                }
+                            }
+                        }
+                        setNegativeButton(android.R.string.cancel) { _, _ -> }
+                    }.show()
+                }
+                "delete_downloads" -> {
+                    val dir = DownloadManager.getInstance(context).downloadFolder
+
+                    AlertDialog.Builder(context).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_clear_downloads_alert_message)
+                        setPositiveButton(android.R.string.ok) { _, _ ->
+                            CoroutineScope(Dispatchers.IO).launch {
+                                job?.cancel()
+                                launch(Dispatchers.Main) {
+                                    summary = context.getString(R.string.settings_storage_usage_loading)
+                                }
+
+                                if (dir.exists())
+                                    dir.listFiles()?.forEach { (it as? FileX)?.deleteRecursively() }
+
+                                job = launch {
+                                    var size = 0L
+
+                                    launch(Dispatchers.Main) {
+                                        summary = context.getString(R.string.settings_storage_usage, byteToString(size))
+                                    }
+                                    dir.walk().forEach {
+                                        size += it.length()
+
+                                        launch(Dispatchers.Main) {
+                                            summary = context.getString(R.string.settings_storage_usage, byteToString(size))
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                        setNegativeButton(android.R.string.cancel) { _, _ -> }
+                    }.show()
+                }
+                "clear_history" -> {
+                    AlertDialog.Builder(context).apply {
+                        setTitle(R.string.warning)
+                        setMessage(R.string.settings_clear_history_alert_message)
+                        setPositiveButton(android.R.string.ok) { _, _ ->
+                            histories.clear()
+                            summary = context.getString(R.string.settings_clear_history_summary, histories.size)
+                        }
+                        setNegativeButton(android.R.string.cancel) { _, _ -> }
+                    }.show()
+                }
+                else -> return false
+            }
+        }
+
+        return true
+    }
+
+    private fun initPreferences() {
+        val context = context ?: return
+
+        with(findPreference<Preference>("delete_cache")) {
+            this ?: return@with
+
+            val dir = File(context.cacheDir, "imageCache")
+
+            summary = context.getString(R.string.settings_storage_usage, byteToString(0))
+            CoroutineScope(Dispatchers.IO).launch {
+                var size = 0L
+
+                dir.walk().forEach {
+                    size += it.length()
+
+                    launch(Dispatchers.Main) {
+                        summary = context.getString(R.string.settings_storage_usage, byteToString(size))
+                    }
+                }
+            }
+
+            onPreferenceClickListener = this@ManageStorageFragment
+        }
+
+        with(findPreference<Preference>("delete_downloads")) {
+            this ?: return@with
+
+            val dir = DownloadManager.getInstance(context).downloadFolder
+
+            summary = context.getString(R.string.settings_storage_usage, byteToString(0))
+            job?.cancel()
+            job = CoroutineScope(Dispatchers.IO).launch {
+                var size = 0L
+
+                dir.walk().forEach {
+                    launch(Dispatchers.Main) {
+                        summary = context.getString(R.string.settings_storage_usage, byteToString(size))
+                    }
+
+                    size += it.length()
+                }
+            }
+
+            onPreferenceClickListener = this@ManageStorageFragment
+        }
+
+        with(findPreference<Preference>("clear_history")) {
+            this ?: return@with
+
+            summary = context.getString(R.string.settings_clear_history_summary, histories.size)
+
+            onPreferenceClickListener = this@ManageStorageFragment
+        }
+    }
+
+    override fun onDestroy() {
+        job?.cancel()
+        super.onDestroy()
+    }
+
+}

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

@@ -0,0 +1,53 @@
+/*
+ *     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.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import com.andrognito.pinlockview.PinLockListener
+import kotlinx.android.synthetic.main.fragment_pin_lock.view.*
+import xyz.quaver.pupil.R
+
+class PINLockFragment : Fragment(), PinLockListener {
+
+    var onPINEntered: ((String) -> Unit)? = null
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_pin_lock, container, false).apply {
+            pin_lock_view.attachIndicatorDots(indicator_dots)
+            pin_lock_view.setPinLockListener(this@PINLockFragment)
+        }
+    }
+
+    override fun onComplete(pin: String?) {
+        onPINEntered?.invoke(pin!!)
+    }
+
+    override fun onEmpty() {
+
+    }
+
+    override fun onPinChange(pinLength: Int, intermediatePin: String?) {
+
+    }
+
+}

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 +1,301 @@
+/*
+ *     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.app.Activity
+import android.content.*
+import android.os.Bundle
+import android.os.LocaleList
+import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
+import androidx.preference.*
+import com.google.android.gms.oss.licenses.OssLicensesMenuActivity
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import xyz.quaver.io.FileX
+import xyz.quaver.io.util.getChild
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.ui.LockActivity
+import xyz.quaver.pupil.ui.SettingsActivity
+import xyz.quaver.pupil.ui.dialog.*
+import xyz.quaver.pupil.util.*
+import xyz.quaver.pupil.util.downloader.DownloadManager
+import java.util.*
+
+class SettingsFragment :
+    PreferenceFragmentCompat(),
+    Preference.OnPreferenceClickListener,
+    Preference.OnPreferenceChangeListener,
+    SharedPreferences.OnSharedPreferenceChangeListener {
+
+    private val lockLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+        if (it.resultCode == Activity.RESULT_OK) {
+            parentFragmentManager
+                .beginTransaction()
+                .replace(R.id.settings, LockSettingsFragment())
+                .addToBackStack("Lock")
+                .commitAllowingStateLoss()
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        val lockManager = LockManager(requireContext())
+
+        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)
+                }
+            }
+        }
+    }
+
+    override fun onPreferenceClick(preference: Preference?): Boolean {
+        with (preference) {
+            this ?: return false
+
+            when (key) {
+                "app_version" -> {
+                    checkUpdate(activity as SettingsActivity, true)
+                }
+                "download_folder" -> {
+                    DownloadLocationDialogFragment().show(parentFragmentManager, "Download Location Dialog")
+                }
+                "default_query" -> {
+                    DefaultQueryDialog(requireContext()).apply {
+                        onPositiveButtonClickListener = { newTags ->
+                            Preferences["default_query"] = newTags.toString()
+                            summary = newTags.toString()
+                        }
+                    }.show()
+                }
+                "app_lock" -> {
+                    val intent = Intent(requireContext(), LockActivity::class.java).apply {
+                        putExtra("force", true)
+                    }
+                    lockLauncher.launch(intent)
+                }
+                "mirrors" -> {
+                    MirrorDialog(requireContext())
+                        .show()
+                }
+                "proxy" -> {
+                    ProxyDialog(requireContext())
+                        .show()
+                }
+                "user_id" -> {
+                    (context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager).setPrimaryClip(
+                        ClipData.newPlainText("user_id", Preferences.get<String>("user_id"))
+                    )
+                    Toast.makeText(context, R.string.settings_user_id_toast, Toast.LENGTH_SHORT).show()
+                }
+                else -> return false
+            }
+        }
+
+        return true
+    }
+
+    override fun onPreferenceChange(preference: Preference?, newValue: Any?): Boolean {
+        with (preference) {
+            this ?: return false
+
+            when (key) {
+                "tag_language" -> {
+                    updateTranslations()
+                }
+                "nomedia" -> {
+                    val create = (newValue as? Boolean) ?: return false
+
+                    return kotlin.runCatching {
+                        val nomedia = DownloadManager.getInstance(context).downloadFolder.getChild(".nomedia")
+
+                        if (create)
+                            nomedia.createNewFile()
+                        else
+                            nomedia.delete()
+                    }.getOrDefault(false)
+                }
+                "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?) {
+        key ?: return
+
+        with(findPreference<Preference>(key)) {
+            this ?: return
+
+            when (key) {
+                "proxy" -> {
+                    summary = context?.let { getProxyInfo().type.name }
+                }
+                "download_folder" -> {
+                    summary = FileX(context, Preferences.get<String>("download_folder")).canonicalPath
+                }
+                "download_folder_name" -> {
+                    summary = Preferences["download_folder_name", "[-id-] -title-"]
+                }
+            }
+        }
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.root_preferences, rootKey)
+
+        Preferences.registerOnSharedPreferenceChangeListener(this)
+
+        initPreferences()
+    }
+
+    override fun onDestroy() {
+        Preferences.unregisterOnSharedPreferenceChangeListener(this)
+        super.onDestroy()
+    }
+
+    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) with@{
+
+                    when (key) {
+                        "app_version" -> {
+                            val manager = requireContext().packageManager
+                            val info = manager.getPackageInfo(requireContext().packageName, 0)
+                            summary = requireContext().getString(R.string.settings_app_version_description, info.versionName)
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "download_folder_name" -> {
+                            summary = Preferences["download_folder_name", "[-id-] -title-"]
+
+                            setOnPreferenceClickListener {
+                                DownloadFolderNameDialogFragment().show(requireActivity().supportFragmentManager, "Download Location Dialog")
+
+                                true
+                            }
+                        }
+                        "download_folder" -> {
+                            summary = FileX(context, Preferences.get<String>("download_folder")).canonicalPath
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "nomedia" -> {
+                            (this as SwitchPreferenceCompat).isChecked = kotlin.runCatching {
+                                DownloadManager.getInstance(context).downloadFolder.getChild(".nomedia").exists()
+                            }.getOrDefault(false)
+
+                            onPreferenceChangeListener = this@SettingsFragment
+                        }
+                        "default_query" -> {
+                            summary = Preferences.get<String>("default_query")
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "app_lock" -> {
+                            val lockManager = LockManager(requireContext())
+                            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
+                        }
+                        "tag_language" -> {
+                            this as ListPreference
+
+                            isEnabled = false
+
+                            CoroutineScope(Dispatchers.IO).launch {
+                                val languages = getAvailableLanguages().distinct().toTypedArray()
+
+                                entries = languages.map { Locale(it).let { loc -> loc.getDisplayLanguage(loc) } }.toTypedArray()
+                                entryValues = languages
+
+                                launch(Dispatchers.Main) {
+                                    isEnabled = true
+                                }
+                            }
+
+                            onPreferenceChangeListener = this@SettingsFragment
+
+                        }
+                        "mirrors" -> {
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "proxy" -> {
+                            summary = getProxyInfo().type.name
+
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "dark_mode" -> {
+                            onPreferenceChangeListener = this@SettingsFragment
+                        }
+                        "old_import_galleries" -> {
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "user_id" -> {
+                            summary = Preferences.get<String>("user_id")
+                            onPreferenceClickListener = this@SettingsFragment
+                        }
+                        "oss" -> {
+                            setOnPreferenceClickListener {
+                                context?.startActivity(Intent(context, OssLicensesMenuActivity::class.java))
+                                true
+                            }
+                        }
+                    }
+
+                }
+            }
+        }
+    }
+}

app/src/main/java/xyz/quaver/pupil/ui/view/FloatingSearchView.kt

@@ -0,0 +1,218 @@
+/*
+ *     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.view
+
+import android.content.Context
+import android.graphics.PorterDuff
+import android.graphics.PorterDuffColorFilter
+import android.graphics.drawable.Animatable
+import android.os.Parcelable
+import android.text.Editable
+import android.text.TextWatcher
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.view.View
+import android.view.inputmethod.EditorInfo
+import android.widget.ImageView
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.core.content.ContextCompat
+import androidx.core.content.res.ResourcesCompat
+import androidx.swiperefreshlayout.widget.CircularProgressDrawable
+import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat
+import xyz.quaver.floatingsearchview.FloatingSearchView
+import xyz.quaver.floatingsearchview.suggestions.model.SearchSuggestion
+import xyz.quaver.floatingsearchview.util.MenuPopupHelper
+import xyz.quaver.floatingsearchview.util.view.MenuView
+import xyz.quaver.floatingsearchview.util.view.SearchInputView
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.favoriteTags
+import xyz.quaver.pupil.types.*
+import java.util.*
+
+class FloatingSearchView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
+    FloatingSearchView(context, attrs),
+    FloatingSearchView.OnSearchListener,
+    TextWatcher
+{
+    private val searchInputView = findViewById<SearchInputView>(R.id.search_bar_text)
+
+    var onHistoryDeleteClickedListener: ((String) -> Unit)? = null
+    var onFavoriteHistorySwitchClickListener: (() -> Unit)? = null
+
+    init {
+        searchInputView.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI
+
+        searchInputView.addTextChangedListener(this)
+        onSearchListener = this
+        onBindSuggestionCallback = { a, b, c, d, e ->
+            onBindSuggestion(a, b, c, d, e)
+        }
+    }
+
+    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()))
+    }
+
+    override fun onSuggestionClicked(searchSuggestion: SearchSuggestion?) {
+        when (searchSuggestion) {
+            is TagSuggestion -> {
+                val tag = "${searchSuggestion.n}:${searchSuggestion.s.replace(Regex("\\s"), "_")}"
+                with(searchInputView.text!!) {
+                    delete(if (lastIndexOf(' ') == -1) 0 else lastIndexOf(' ') + 1, length)
+
+                    if (!this.contains(tag))
+                        append("$tag ")
+                }
+            }
+            is Suggestion -> {
+                with(searchInputView.text!!) {
+                    clear()
+                    append(searchSuggestion.body)
+                }
+            }
+            is FavoriteHistorySwitch -> onFavoriteHistorySwitchClickListener?.invoke()
+        }
+    }
+
+    override fun onSearchAction(currentQuery: String?) {}
+
+    fun onBindSuggestion(
+        suggestionView: View?,
+        leftIcon: ImageView?,
+        textView: TextView?,
+        item: SearchSuggestion?,
+        itemPosition: Int
+    ) {
+      when(item) {
+            is TagSuggestion -> {
+                val tag = "${item.n}:${item.s.replace(Regex("\\s"), "_")}"
+
+                leftIcon?.setImageDrawable(
+                    ResourcesCompat.getDrawable(
+                        resources,
+                        when(item.n) {
+                            "female" -> R.drawable.gender_female
+                            "male" -> R.drawable.gender_male
+                            "language" -> R.drawable.translate
+                            "group" -> R.drawable.account_group
+                            "character" -> R.drawable.account_star
+                            "series" -> R.drawable.book_open
+                            "artist" -> R.drawable.brush
+                            else -> R.drawable.tag
+                        },
+                        context.theme)
+                )
+
+                with(suggestionView?.findViewById<ImageView>(R.id.right_icon)) {
+                    this ?: return@with
+
+                    if (favoriteTags.contains(Tag.parse(tag)))
+                        setImageResource(R.drawable.ic_star_filled)
+                    else
+                        setImageResource(R.drawable.ic_star_empty)
+
+                    visibility = View.VISIBLE
+                    rotation = 0f
+
+                    isEnabled = true
+                    isClickable = true
+
+                    setOnClickListener {
+                        val tag = Tag.parse(tag)
+
+                        if (favoriteTags.contains(tag)) {
+                            setImageResource(R.drawable.ic_star_empty)
+                            favoriteTags.remove(tag)
+                        }
+                        else {
+                            setImageDrawable(
+                                AnimatedVectorDrawableCompat.create(context,
+                                    R.drawable.avd_star
+                                ))
+                            (drawable as Animatable).start()
+
+                            favoriteTags.add(tag)
+                        }
+                    }
+                }
+
+                if (item.t > 0) {
+                    (suggestionView as? LinearLayout)?.let {
+                        val count = it.findViewById<TextView>(R.id.count)
+                        if (count == null)
+                            it.addView(
+                                LayoutInflater.from(context).inflate(R.layout.suggestion_count, suggestionView, false)
+                                    .apply {
+                                        this as TextView
+
+                                        text = item.t.toString()
+                                    }, 2
+                            )
+                        else
+                            count.text = item.t.toString()
+                    }
+                }
+            }
+            is FavoriteHistorySwitch -> {
+                leftIcon?.setImageDrawable(ResourcesCompat.getDrawable(resources, R.drawable.swap_horizontal, context.theme))
+            }
+            is Suggestion -> {
+                leftIcon?.setImageDrawable(ResourcesCompat.getDrawable(resources, R.drawable.history, context.theme))
+
+                with(suggestionView?.findViewById<ImageView>(R.id.right_icon)) {
+                    this ?: return@with
+
+                    setImageDrawable(ResourcesCompat.getDrawable(resources, R.drawable.delete, context.theme))
+
+                    visibility = View.VISIBLE
+                    rotation = 0f
+
+                    isEnabled = true
+                    isClickable = true
+
+                    setOnClickListener {
+                        onHistoryDeleteClickedListener?.invoke(item.body)
+                    }
+                }
+            }
+            is LoadingSuggestion -> {
+                leftIcon?.setImageDrawable(CircularProgressDrawable(context).also {
+                    it.setStyle(CircularProgressDrawable.DEFAULT)
+                    it.colorFilter = PorterDuffColorFilter(ContextCompat.getColor(context, R.color.colorAccent), PorterDuff.Mode.SRC_IN)
+                    it.start()
+                })
+            }
+            is NoResultSuggestion -> {
+                leftIcon?.setImageDrawable(ResourcesCompat.getDrawable(resources, R.drawable.close, context.theme))
+            }
+        }
+    }
+}

app/src/main/java/xyz/quaver/pupil/ui/view/TagChip.kt

@@ -0,0 +1,100 @@
+/*
+ *     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.view
+
+import android.annotation.SuppressLint
+import android.content.Context
+import androidx.core.content.ContextCompat
+import com.google.android.material.chip.Chip
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.favoriteTags
+import xyz.quaver.pupil.types.Tag
+import xyz.quaver.pupil.util.translations
+import xyz.quaver.pupil.util.wordCapitalize
+
+@SuppressLint("ViewConstructor")
+class TagChip(context: Context, _tag: Tag) : Chip(context) {
+
+    val tag: Tag =
+        _tag.let {
+            when {
+                it.area != null -> it
+                else -> Tag("tag", _tag.tag)
+            }
+        }
+
+    private val languages = context.resources.getStringArray(R.array.languages).map {
+        it.split("|").let { split ->
+            Pair(split[0], split[1])
+        }
+    }.toMap()
+
+    init {
+        when(tag.area) {
+            "male" -> {
+                setChipBackgroundColorResource(R.color.material_blue_700)
+                setTextColor(ContextCompat.getColor(context, android.R.color.white))
+                setCloseIconTintResource(android.R.color.white)
+                chipIcon = ContextCompat.getDrawable(context, R.drawable.gender_male_white)
+            }
+            "female" -> {
+                setChipBackgroundColorResource(R.color.material_pink_600)
+                setTextColor(ContextCompat.getColor(context, android.R.color.white))
+                setCloseIconTintResource(android.R.color.white)
+                chipIcon = ContextCompat.getDrawable(context, R.drawable.gender_female_white)
+            }
+        }
+
+        if (favoriteTags.contains(tag))
+            setChipBackgroundColorResource(R.color.material_orange_500)
+
+        isCloseIconVisible = true
+        closeIcon = ContextCompat.getDrawable(context,
+            if (favoriteTags.contains(tag))
+                R.drawable.ic_star_filled
+            else
+                R.drawable.ic_star_empty
+        )
+
+        setOnCloseIconClickListener {
+            if (favoriteTags.contains(tag)) {
+                favoriteTags.remove(tag)
+                closeIcon = ContextCompat.getDrawable(context, R.drawable.ic_star_empty)
+
+                when(tag.area) {
+                    "male" -> setChipBackgroundColorResource(R.color.material_blue_700)
+                    "female" -> setChipBackgroundColorResource(R.color.material_pink_600)
+                    else -> chipBackgroundColor = null
+                }
+            } else {
+                favoriteTags.add(tag)
+                closeIcon = ContextCompat.getDrawable(context, R.drawable.ic_star_filled)
+                setChipBackgroundColorResource(R.color.material_orange_500)
+            }
+        }
+
+        text = when (tag.area) {
+            "language" -> languages[tag.tag]
+            else -> (translations[tag.tag] ?: tag.tag).wordCapitalize()
+        }
+
+        setEnsureMinTouchTargetSize(false)
+    }
+
+}

app/src/main/java/xyz/quaver/pupil/ui/view/TagChipGroup.kt

@@ -0,0 +1,90 @@
+/*
+ *     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.view
+
+import android.content.Context
+import android.content.res.TypedArray
+import android.util.AttributeSet
+import com.google.android.material.chip.Chip
+import com.google.android.material.chip.ChipGroup
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.types.Tag
+import xyz.quaver.pupil.types.Tags
+
+class TagChipGroup @JvmOverloads constructor(context: Context, attr: AttributeSet? = null, attrStyle: Int = R.attr.chipGroupStyle, val tags: Tags = Tags()) : ChipGroup(context, attr, attrStyle), MutableSet<Tag> by tags {
+
+    object Defaults {
+        val maxChipSize = 10
+    }
+
+    var maxChipSize: Int = Defaults.maxChipSize
+        set(value) {
+            field = value
+
+            refresh()
+        }
+
+    private val moreView = Chip(context).apply {
+        text = "…"
+
+        setEnsureMinTouchTargetSize(false)
+
+        setOnClickListener {
+            removeView(this)
+
+            for (i in maxChipSize until tags.size) {
+                val tag = tags.elementAt(i)
+
+                addView(TagChip(context, tag).apply {
+                    setOnClickListener {
+                        onClickListener?.invoke(tag)
+                    }
+                })
+            }
+        }
+    }
+
+    var onClickListener: ((Tag) -> Unit)? = null
+
+    private fun applyAttributes(attr: TypedArray) {
+        maxChipSize = attr.getInt(R.styleable.TagChipGroup_maxTag, Defaults.maxChipSize)
+    }
+
+    fun refresh() {
+        this.removeAllViews()
+
+        tags.take(maxChipSize).forEach {
+            this.addView(TagChip(context, it).apply {
+                setOnClickListener {
+                    onClickListener?.invoke(this.tag)
+                }
+            })
+        }
+
+        if (maxChipSize > 0 && this.size > maxChipSize)
+            addView(moreView)
+    }
+
+    init {
+        applyAttributes(context.obtainStyledAttributes(attr, R.styleable.TagChipGroup))
+
+        refresh()
+    }
+
+}

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/ItemClickSupport.java

@@ -1,107 +0,0 @@
-package xyz.quaver.pupil.util;
-
-import android.view.View;
-import androidx.annotation.NonNull;
-import androidx.recyclerview.widget.RecyclerView;
-import xyz.quaver.pupil.R;
-
-/*
-  Source: http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/
-  USAGE:
-
-  ItemClickSupport.addTo(mRecyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
-      @Override
-      public void onItemClicked(RecyclerView recyclerView, int position, View v) {
-          // do it
-      }
-  });
-
-*/
-public class ItemClickSupport {
-    private final RecyclerView mRecyclerView;
-    private OnItemClickListener mOnItemClickListener;
-    private OnItemLongClickListener mOnItemLongClickListener;
-    private View.OnClickListener mOnClickListener = new View.OnClickListener() {
-        @Override
-        public void onClick(View v) {
-            if (mOnItemClickListener != null) {
-                RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
-                mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
-            }
-        }
-    };
-    private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
-        @Override
-        public boolean onLongClick(View v) {
-            if (mOnItemLongClickListener != null) {
-                RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
-                return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
-            }
-            return false;
-        }
-    };
-    private RecyclerView.OnChildAttachStateChangeListener mAttachListener
-            = new RecyclerView.OnChildAttachStateChangeListener() {
-        @Override
-        public void onChildViewAttachedToWindow(@NonNull View view) {
-            if (mOnItemClickListener != null) {
-                view.setOnClickListener(mOnClickListener);
-            }
-            if (mOnItemLongClickListener != null) {
-                view.setOnLongClickListener(mOnLongClickListener);
-            }
-        }
-
-        @Override
-        public void onChildViewDetachedFromWindow(@NonNull View view) {
-
-        }
-    };
-
-    private ItemClickSupport(RecyclerView recyclerView) {
-        mRecyclerView = recyclerView;
-        mRecyclerView.setTag(R.id.item_click_support, this);
-        mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
-    }
-
-    public static ItemClickSupport addTo(RecyclerView view) {
-        ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
-        if (support == null) {
-            support = new ItemClickSupport(view);
-        }
-        return support;
-    }
-
-    public static ItemClickSupport removeFrom(RecyclerView view) {
-        ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
-        if (support != null) {
-            support.detach(view);
-        }
-        return support;
-    }
-
-    public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
-        mOnItemClickListener = listener;
-        return this;
-    }
-
-    public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
-        mOnItemLongClickListener = listener;
-        return this;
-    }
-
-    private void detach(RecyclerView view) {
-        view.removeOnChildAttachStateChangeListener(mAttachListener);
-        view.setTag(R.id.item_click_support, null);
-    }
-
-    public interface OnItemClickListener {
-
-        void onItemClicked(RecyclerView recyclerView, int position, View v);
-    }
-
-    public interface OnItemLongClickListener {
-
-        boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
-    }
-}

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

@@ -0,0 +1,69 @@
+/*
+ *     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
+
+import android.view.View
+import androidx.recyclerview.widget.RecyclerView
+import xyz.quaver.pupil.R
+
+class ItemClickSupport(private val recyclerView: RecyclerView) {
+
+    var onItemClickListener: ((RecyclerView, Int, View) -> Unit)? = null
+    var onItemLongClickListener: ((RecyclerView, Int, View) -> Boolean)? = null
+
+    init {
+        recyclerView.apply {
+            setTag(R.id.item_click_support, this)
+            addOnChildAttachStateChangeListener(object: RecyclerView.OnChildAttachStateChangeListener {
+                override fun onChildViewAttachedToWindow(view: View) {
+                    onItemClickListener?.let { listener ->
+                        view.setOnClickListener {
+                            recyclerView.getChildViewHolder(view).let { holder ->
+                                listener.invoke(recyclerView, holder.adapterPosition, view)
+                            }
+                        }
+                    }
+                    onItemLongClickListener?.let { listener ->
+                        view.setOnLongClickListener {
+                            recyclerView.getChildViewHolder(view).let { holder ->
+                                listener.invoke(recyclerView, holder.adapterPosition, view)
+                            }
+                        }
+                    }
+                }
+
+                override fun onChildViewDetachedFromWindow(view: View) {
+                    // Do Nothing
+                }
+            })
+        }
+    }
+
+    fun detach() {
+        recyclerView.apply {
+            clearOnChildAttachStateChangeListeners()
+            setTag(R.id.item_click_support, null)
+        }
+    }
+
+    companion object {
+        fun addTo(view: RecyclerView) = view.let { removeFrom(it); ItemClickSupport(it) }
+        fun removeFrom(view: RecyclerView) = (view.tag as? ItemClickSupport)?.detach()
+    }
+}

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

@@ -0,0 +1,48 @@
+/*
+ *     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
+
+import android.content.SharedPreferences
+import kotlin.reflect.KClass
+
+lateinit var preferences: SharedPreferences
+
+object Preferences: SharedPreferences by preferences {
+
+    val defMap = mapOf(
+        String::class to "",
+        Int::class to -1,
+        Long::class to -1L,
+        Boolean::class to false,
+        Set::class to emptySet<Any>()
+    )
+
+    operator fun set(key: String, value: String) = edit().putString(key, value).apply()
+    operator fun set(key: String, value: Int) = edit().putInt(key, value).apply()
+    operator fun set(key: String, value: Long) = edit().putLong(key, value).apply()
+    operator fun set(key: String, value: Boolean) = edit().putBoolean(key, value).apply()
+    operator fun set(key: String, value: Set<String>) = edit().putStringSet(key, value).apply()
+
+    @Suppress("UNCHECKED_CAST")
+    inline operator fun <reified T: Any> get(key: String, defaultVal: T = defMap[T::class] as T): T = (all[key] as? T) ?: defaultVal
+
+    fun remove(key: String) {
+        edit().remove(key).apply()
+    }
+}

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

@@ -0,0 +1,93 @@
+/*
+ *     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
+
+import kotlinx.serialization.*
+import kotlinx.serialization.builtins.ListSerializer
+import kotlinx.serialization.json.Json
+import java.io.File
+import java.util.*
+
+class SavedSet <T: Any> (private val file: File, private val any: T, private val set: MutableSet<T> = Collections.synchronizedSet(mutableSetOf())) : MutableSet<T> by set {
+
+    @Suppress("UNCHECKED_CAST")
+    @OptIn(ExperimentalSerializationApi::class)
+    val serializer: KSerializer<List<T>>
+        get() = ListSerializer(serializer(any::class.java) as KSerializer<T>)
+
+    init {
+        if (!file.exists()) {
+            file.parentFile?.mkdirs()
+            save()
+        }
+        load()
+    }
+
+    fun load() {
+        synchronized(this) {
+            set.clear()
+            kotlin.runCatching {
+                Json.decodeFromString(serializer, file.readText())
+            }.onSuccess {
+                set.addAll(it)
+            }
+        }
+    }
+
+    @OptIn(ExperimentalSerializationApi::class)
+    fun save() {
+        synchronized(this) {
+            file.writeText(Json.encodeToString(serializer, set.toList()))
+        }
+    }
+
+    override fun add(element: T): Boolean {
+        load()
+
+        set.remove(element)
+
+        return set.add(element).also {
+            save()
+        }
+    }
+
+    override fun addAll(elements: Collection<T>): Boolean {
+        load()
+
+        set.removeAll(elements)
+
+        return set.addAll(elements).also {
+            save()
+        }
+    }
+
+    override fun remove(element: T): Boolean {
+        load()
+
+        return set.remove(element).also {
+            save()
+        }
+    }
+
+    override fun clear() {
+        set.clear()
+        save()
+    }
+
+}

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

@@ -1,37 +0,0 @@
-package xyz.quaver.pupil.util
-
-import android.graphics.Paint
-import android.text.style.LineHeightSpan
-
-class SetLineOverlap(private val overlap: Boolean) : LineHeightSpan {
-    companion object {
-        private var originalBottom = 15
-        private var originalDescent = 13
-        private var overlapSaved = false
-    }
-
-    override fun chooseHeight(
-        text: CharSequence?,
-        start: Int,
-        end: Int,
-        spanstartv: Int,
-        lineHeight: Int,
-        fm: Paint.FontMetricsInt?
-    ) {
-        fm ?: return
-
-        if (overlap) {
-            if (overlapSaved) {
-                originalBottom = fm.bottom
-                originalDescent = fm.descent
-                overlapSaved = true
-            }
-            fm.bottom += fm.top
-            fm.descent += fm.top
-        } else {
-            fm.bottom = originalBottom
-            fm.descent = originalDescent
-            overlapSaved = false
-        }
-    }
-}

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

@@ -0,0 +1,119 @@
+/*
+ *     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/>.
+ */
+
+@file:Suppress("DEPRECATION", "Recycle")
+
+package xyz.quaver.pupil.util
+
+import android.content.Context
+import android.content.pm.PackageManager
+import android.graphics.ImageFormat
+import android.graphics.SurfaceTexture
+import android.hardware.Camera
+import android.view.Surface
+import android.view.WindowManager
+import com.google.android.gms.tasks.Task
+import com.google.mlkit.vision.common.InputImage
+import com.google.mlkit.vision.face.Face
+import com.google.mlkit.vision.face.FaceDetection
+import com.google.mlkit.vision.face.FaceDetectorOptions
+
+/** Check if this device has a camera */
+private fun Context.checkCameraHardware() =
+    this.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)
+
+private fun openFrontCamera() : Pair<Camera?, Int> {
+    var camera: Camera? = null
+    var cameraID: Int = -1
+
+    val cameraInfo = Camera.CameraInfo()
+
+    for (i in 0 until Camera.getNumberOfCameras()) {
+        Camera.getCameraInfo(i, cameraInfo)
+        if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT)
+            runCatching { Camera.open(i) }.getOrNull()?.let { camera = it; cameraID = i }
+
+        if (camera != null) break
+    }
+
+    return Pair(camera, cameraID)
+}
+
+val orientations = mapOf(
+    Surface.ROTATION_0 to 0,
+    Surface.ROTATION_90 to 90,
+    Surface.ROTATION_180 to 180,
+    Surface.ROTATION_270 to 270,
+)
+
+private fun getRotation(context: Context, cameraID: Int): Int {
+    val cameraRotation = Camera.CameraInfo().also { Camera.getCameraInfo(cameraID, it) }.orientation
+    val rotation = orientations[(context.getSystemService(Context.WINDOW_SERVICE) as WindowManager).defaultDisplay.rotation] ?: error("")
+
+    return (cameraRotation + rotation) % 360
+}
+
+var camera: Camera? = null
+var surfaceTexture: SurfaceTexture? = null
+private val detector = FaceDetection.getClient(
+    FaceDetectorOptions.Builder()
+        .setClassificationMode(FaceDetectorOptions.CLASSIFICATION_MODE_ALL)
+        .build()
+)
+private var process: Task<List<Face>>? = null
+
+fun startCamera(context: Context, callback: (List<Face>) -> Unit) {
+    if (camera != null) closeCamera()
+
+    val cameraID = openFrontCamera().let { (cam, cameraID) ->
+        cam ?: return
+        camera = cam
+        cameraID
+    }
+
+    with (camera!!) {
+        parameters = parameters.apply {
+            setPreviewSize(640, 480)
+            previewFormat = ImageFormat.NV21
+        }
+
+        setPreviewTexture(surfaceTexture ?: SurfaceTexture(0).also {
+            surfaceTexture = it
+        })
+        startPreview()
+        setPreviewCallback { bytes, _ ->
+            if (process?.isComplete == false)
+                return@setPreviewCallback
+
+            val rotation = getRotation(context, cameraID)
+
+            val image = InputImage.fromByteArray(bytes, 640, 480, rotation, InputImage.IMAGE_FORMAT_NV21)
+            process = detector.process(image)
+                .addOnSuccessListener(callback)
+        }
+    }
+}
+
+fun closeCamera() {
+    camera?.setPreviewCallback(null)
+    camera?.stopPreview()
+    surfaceTexture?.release()
+    surfaceTexture = null
+    camera?.release()
+    camera = null
+}

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

@@ -0,0 +1,269 @@
+/*
+ *     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.downloader
+
+import android.content.Context
+import android.content.ContextWrapper
+import android.net.Uri
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import okhttp3.Request
+import xyz.quaver.Code
+import xyz.quaver.hitomi.GalleryBlock
+import xyz.quaver.hitomi.Reader
+import xyz.quaver.io.FileX
+import xyz.quaver.io.util.*
+import xyz.quaver.pupil.client
+import xyz.quaver.pupil.util.Preferences
+import java.io.File
+import java.io.IOException
+import java.util.concurrent.ConcurrentHashMap
+
+@Serializable
+data class Metadata(
+    var galleryBlock: GalleryBlock? = null,
+    var reader: Reader? = null,
+    var imageList: MutableList<String?>? = null
+) {
+    fun copy(): Metadata = Metadata(galleryBlock, reader, imageList?.let { MutableList(it.size) { i -> it[i] } })
+}
+
+class Cache private constructor(context: Context, val galleryID: Int) : ContextWrapper(context) {
+
+    companion object {
+        val instances = ConcurrentHashMap<Int, Cache>()
+
+        fun getInstance(context: Context, galleryID: Int) =
+            instances[galleryID] ?: synchronized(this) {
+                instances[galleryID] ?: Cache(context, galleryID).also { instances.put(galleryID, it) }
+            }
+
+        @Synchronized
+        fun delete(context: Context, galleryID: Int) {
+            File(context.cacheDir, "imageCache/$galleryID").deleteRecursively()
+            instances.remove(galleryID)
+        }
+    }
+
+    init {
+        cacheFolder.mkdirs()
+    }
+
+    var metadata = kotlin.runCatching {
+        findFile(".metadata")?.readText()?.let {
+            Json.decodeFromString<Metadata>(it)
+        }
+    }.getOrNull() ?: Metadata()
+
+    val downloadFolder: FileX?
+        get() = DownloadManager.getInstance(this).getDownloadFolder(galleryID)
+
+    val cacheFolder: FileX
+        get() = FileX(this, cacheDir, "imageCache/$galleryID").also {
+            if (!it.exists())
+                it.mkdirs()
+        }
+
+    fun findFile(fileName: String): FileX? =
+         downloadFolder?.let { downloadFolder -> downloadFolder.getChild(fileName).let {
+            if (it.exists()) it else null
+        } } ?: cacheFolder.getChild(fileName).let {
+            if (it.exists()) it else null
+        }
+
+    @Suppress("BlockingMethodInNonBlockingContext")
+    fun setMetadata(change: (Metadata) -> Unit) {
+        change.invoke(metadata)
+
+        val file = cacheFolder.getChild(".metadata")
+
+        kotlin.runCatching {
+            if (!file.exists()) {
+                file.createNewFile()
+            }
+            file.writeText(Json.encodeToString(metadata))
+        }
+    }
+
+    suspend fun getGalleryBlock(): GalleryBlock? {
+        val sources = listOf(
+            { xyz.quaver.hitomi.getGalleryBlock(galleryID) },
+            { xyz.quaver.hiyobi.getGalleryBlock(galleryID) }
+        )
+
+        return metadata.galleryBlock
+            ?: withContext(Dispatchers.IO) {
+                var galleryBlock: GalleryBlock? = null
+
+                for (source in sources) {
+                    galleryBlock = try {
+                        source.invoke()
+                    } catch (e: Exception) { null }
+
+                    if (galleryBlock != null)
+                        break
+                }
+
+                galleryBlock?.also {
+                    setMetadata { metadata -> metadata.galleryBlock = it }
+                }
+            }
+    }
+
+    @Suppress("BlockingMethodInNonBlockingContext")
+    suspend fun getThumbnail(): Uri =
+        findFile(".thumbnail")?.uri
+            ?: getGalleryBlock()?.thumbnails?.firstOrNull()?.let { withContext(Dispatchers.IO) {
+                kotlin.runCatching {
+                    val request = Request.Builder()
+                        .url(it)
+                        .build()
+
+                    client.newCall(request).execute().also { if (it.code() != 200) throw IOException() }.body()?.use { it.bytes() }
+                }.getOrNull()?.let { thumbnail -> kotlin.runCatching {
+                    cacheFolder.getChild(".thumbnail").also {
+                        if (!it.exists())
+                            it.createNewFile()
+
+                        it.writeBytes(thumbnail)
+                    }
+                }.getOrNull()?.uri }
+            } } ?: Uri.EMPTY
+
+    suspend fun getReader(): Reader? {
+        val mirrors = Preferences.get<String>("mirrors").let { if (it.isEmpty()) emptyList() else it.split('>') }
+
+        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{ o1, o2 -> mirrors.indexOf(o1.name) - mirrors.indexOf(o2.name) }
+            else
+                it
+        }
+
+        return metadata.reader
+            ?: withContext(Dispatchers.IO) {
+                var reader: Reader? = null
+
+                for (source in sources) {
+                    reader = try {
+                        source.value.invoke()
+                    } catch (e: Exception) {
+                        null
+                    }
+
+                   if (reader != null)
+                       break
+                }
+
+                reader?.also {
+                    setMetadata { metadata ->
+                        metadata.reader = it
+
+                        if (metadata.imageList == null)
+                            metadata.imageList = MutableList(reader.galleryInfo.files.size) { null }
+                    }
+                }
+            }
+    }
+
+    fun getImage(index: Int): FileX? =
+        metadata.imageList?.getOrNull(index)?.let { findFile(it) }
+
+    @Suppress("BlockingMethodInNonBlockingContext")
+    fun putImage(index: Int, fileName: String, data: ByteArray) {
+        val file = cacheFolder.getChild(fileName)
+
+        if (!file.exists())
+            file.createNewFile()
+        file.writeBytes(data)
+        setMetadata { metadata -> metadata.imageList!![index] = fileName }
+    }
+
+    private val lock = ConcurrentHashMap<Int, Mutex>()
+    @Suppress("BlockingMethodInNonBlockingContext")
+    fun moveToDownload() = CoroutineScope(Dispatchers.IO).launch {
+        val downloadFolder = downloadFolder ?: return@launch
+
+        if (lock[galleryID]?.isLocked == true)
+            return@launch
+
+        (lock[galleryID] ?: Mutex().also { lock[galleryID] = it }).withLock {
+            val cacheMetadata = cacheFolder.getChild(".metadata")
+            val downloadMetadata = downloadFolder.getChild(".metadata")
+
+            if (!cacheMetadata.exists())
+                return@launch
+
+            if (cacheMetadata.exists()) {
+                kotlin.runCatching {
+                    if (!downloadMetadata.exists())
+                        downloadMetadata.createNewFile()
+
+                    downloadMetadata.writeText(Json.encodeToString(metadata))
+                }
+            }
+
+            val cacheThumbnail = cacheFolder.getChild(".thumbnail")
+            val downloadThumbnail = downloadFolder.getChild(".thumbnail")
+
+            if (cacheThumbnail.exists()) {
+                kotlin.runCatching {
+                    if (!downloadThumbnail.exists())
+                        downloadThumbnail.createNewFile()
+
+                    downloadThumbnail.outputStream()?.use { target -> target.channel.truncate(0L); cacheThumbnail.inputStream()?.use { source ->
+                        source.copyTo(target)
+                    } }
+                    cacheThumbnail.delete()
+                }
+            }
+
+            metadata.imageList?.forEach { imageName ->
+                imageName ?: return@forEach
+                val target = downloadFolder.getChild(imageName)
+                val source = cacheFolder.getChild(imageName)
+
+                if (!source.exists())
+                    return@forEach
+
+                kotlin.runCatching {
+                    if (!target.exists())
+                        target.createNewFile()
+
+                    target.outputStream()?.use { target -> target.channel.truncate(0L); source.inputStream()?.use { source ->
+                        source.copyTo(target)
+                    } }
+                }
+            }
+
+            cacheFolder.deleteRecursively()
+        }
+    }
+}

app/src/main/java/xyz/quaver/pupil/util/downloader/DownloadManager.kt

@@ -0,0 +1,130 @@
+/*
+ *     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.downloader
+
+import android.content.Context
+import android.content.ContextWrapper
+import android.util.Log
+import kotlinx.coroutines.runBlocking
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import okhttp3.Call
+import xyz.quaver.io.FileX
+import xyz.quaver.io.util.*
+import xyz.quaver.pupil.client
+import xyz.quaver.pupil.services.DownloadService
+import xyz.quaver.pupil.util.Preferences
+import xyz.quaver.pupil.util.formatDownloadFolder
+
+class DownloadManager private constructor(context: Context) : ContextWrapper(context) {
+
+    companion object {
+        @Volatile private var instance: DownloadManager? = null
+
+        fun getInstance(context: Context) =
+            instance ?: synchronized(this) {
+                instance ?: DownloadManager(context).also { instance = it }
+            }
+    }
+
+    val defaultDownloadFolder = FileX(this, getExternalFilesDir(null)!!)
+
+    val downloadFolder: FileX
+        get() = {
+            kotlin.runCatching {
+                FileX(this, Preferences.get<String>("download_folder"))
+            }.getOrElse {
+                Preferences["download_folder"] = defaultDownloadFolder.uri.toString()
+                defaultDownloadFolder
+            }
+        }.invoke()
+
+    private var prevDownloadFolder: FileX? = null
+    private var downloadFolderMapInstance: MutableMap<Int, String>? = null
+    val downloadFolderMap: MutableMap<Int, String>
+        @Synchronized
+        get() {
+            if (prevDownloadFolder != downloadFolder) {
+                prevDownloadFolder = downloadFolder
+                downloadFolderMapInstance = {
+                    val file = downloadFolder.getChild(".download")
+
+                    val data = if (file.exists())
+                        kotlin.runCatching {
+                            file.readText()?.let { Json.decodeFromString<MutableMap<Int, String>>(it) }
+                        }.onFailure { file.delete() }.getOrNull()
+                    else
+                        null
+
+                    data ?: {
+                        file.createNewFile()
+                        mutableMapOf<Int, String>()
+                    }.invoke()
+                }.invoke()
+            }
+
+            return downloadFolderMapInstance!!
+        }
+
+
+    @Synchronized
+    fun isDownloading(galleryID: Int): Boolean {
+        val isThisGallery: (Call) -> Boolean = { (it.request().tag() as? DownloadService.Tag)?.galleryID == galleryID }
+
+        return downloadFolderMap.containsKey(galleryID)
+                && client.dispatcher().let { it.queuedCalls().any(isThisGallery) || it.runningCalls().any(isThisGallery) }
+    }
+
+    @Synchronized
+    fun getDownloadFolder(galleryID: Int): FileX? =
+        downloadFolderMap[galleryID]?.let { downloadFolder.getChild(it) }
+
+    @Synchronized
+    fun addDownloadFolder(galleryID: Int) {
+        val name = runBlocking {
+            Cache.getInstance(this@DownloadManager, galleryID).getGalleryBlock()
+        }?.formatDownloadFolder() ?: return
+
+        val folder = downloadFolder.getChild(name)
+
+        if (folder.exists())
+            return
+
+        folder.mkdir()
+
+        downloadFolderMap[galleryID] = folder.name
+
+        downloadFolder.getChild(".download").let { if (!it.exists()) it.createNewFile() }
+        downloadFolder.getChild(".download").writeText(Json.encodeToString(downloadFolderMap))
+    }
+
+    @Synchronized
+    fun deleteDownloadFolder(galleryID: Int) {
+        downloadFolderMap[galleryID]?.let {
+            kotlin.runCatching {
+                downloadFolder.getChild(it).deleteRecursively()
+                downloadFolderMap.remove(galleryID)
+
+                downloadFolder.getChild(".download").let { if (!it.exists()) it.createNewFile() }
+                downloadFolder.getChild(".download").writeText(Json.encodeToString(downloadFolderMap))
+            }
+        }
+    }
+}

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

@@ -19,23 +19,47 @@
 package xyz.quaver.pupil.util
 
 import android.content.Context
-import android.os.Build
-import android.os.Environment
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import xyz.quaver.pupil.histories
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.downloader.DownloadManager
 import java.io.File
 
-fun getCachedGallery(context: Context, galleryID: Int): File {
-    return File(getDownloadDirectory(context), galleryID.toString()).let {
-        when {
-            it.exists() -> it
-            else -> File(context.cacheDir, "imageCache/$galleryID")
+val mutex = Mutex()
+fun cleanCache(context: Context) = CoroutineScope(Dispatchers.IO).launch {
+    if (mutex.isLocked) return@launch
+
+    mutex.withLock {
+        val cacheFolder = File(context.cacheDir, "imageCache")
+        val downloadManager = DownloadManager.getInstance(context)
+
+        val limit = (Preferences.get<String>("cache_limit").toLongOrNull() ?: 0L)*1024*1024*1024
+
+        if (limit == 0L) return@withLock
+
+        val cacheSize = {
+            var size = 0L
+
+            cacheFolder.walk().forEach {
+                size += it.length()
+            }
+
+            size
         }
+
+        if (cacheSize.invoke() > limit)
+            while (cacheSize.invoke() > limit/2) {
+                val caches = cacheFolder.list() ?: return@withLock
+
+                (histories.toList().firstOrNull {
+                    caches.contains(it.toString()) && !downloadManager.isDownloading(it)
+                } ?: return@withLock).let {
+                    Cache.delete(context, it)
+                }
+            }
     }
 }
-
-@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")
-}

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

@@ -1,83 +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 kotlinx.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
-import kotlinx.serialization.parseList
-import kotlinx.serialization.stringify
-import java.io.File
-
-class Histories(private val file: File) : ArrayList<Int>() {
-
-    init {
-        if (!file.exists())
-            file.parentFile?.mkdirs()
-
-        try {
-            load()
-        } catch (e: Exception) {
-            save()
-        }
-    }
-
-    @UseExperimental(ImplicitReflectionSerializer::class)
-    fun load() : Histories {
-        return apply {
-            super.clear()
-            addAll(
-                Json(JsonConfiguration.Stable).parseList(
-                    file.bufferedReader().use { it.readText() }
-                )
-            )
-        }
-    }
-
-    @UseExperimental(ImplicitReflectionSerializer::class)
-    fun save() {
-        file.writeText(Json(JsonConfiguration.Stable).stringify(this))
-    }
-
-    override fun add(element: Int): Boolean {
-        load()
-
-        if (contains(element))
-            super.remove(element)
-
-        super.add(0, element)
-
-        save()
-
-        return true
-    }
-
-    override fun remove(element: Int): Boolean {
-        load()
-        val retval = super.remove(element)
-        save()
-
-        return retval
-    }
-
-    override fun clear() {
-        super.clear()
-        save()
-    }
-}

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

@@ -21,9 +21,10 @@ package xyz.quaver.pupil.util
 import android.content.Context
 import android.content.ContextWrapper
 import androidx.core.content.ContextCompat
-import kotlinx.serialization.*
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
 import java.io.File
 import java.security.MessageDigest
 
@@ -42,7 +43,7 @@ fun hashWithSalt(password: String): Pair<String, String> {
     return Pair(hash(password+salt), salt)
 }
 
-val source = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+const val source = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
 
 @Serializable
 data class Lock(val type: Type, val hash: String, val salt: String) {
@@ -73,7 +74,6 @@ class LockManager(base: Context): ContextWrapper(base) {
         load()
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     private fun load() {
         val lock = File(ContextCompat.getDataDir(this), "lock.json")
 
@@ -82,17 +82,16 @@ class LockManager(base: Context): ContextWrapper(base) {
             lock.writeText("[]")
         }
 
-        locks = ArrayList(Json(JsonConfiguration.Stable).parseList(lock.readText()))
+        locks = Json.decodeFromString(lock.readText())
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     private fun save() {
         val lock = File(ContextCompat.getDataDir(this), "lock.json")
 
         if (!lock.exists())
             lock.createNewFile()
 
-        lock.writeText(Json(JsonConfiguration.Stable).stringify(locks?.toList() ?: listOf()))
+        lock.writeText(Json.encodeToString(locks?.toList() ?: listOf()))
     }
 
     fun add(lock: Lock) {

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

@@ -18,23 +18,123 @@
 
 package xyz.quaver.pupil.util
 
+import android.annotation.SuppressLint
 import android.content.Context
-import android.content.pm.PackageManager
+import android.content.Intent
 import android.os.Build
 import androidx.core.content.ContextCompat
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonObject
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import xyz.quaver.Code
+import xyz.quaver.hitomi.GalleryBlock
+import xyz.quaver.hitomi.Reader
+import xyz.quaver.hitomi.getReferer
+import xyz.quaver.hitomi.imageUrlFromImage
+import xyz.quaver.hiyobi.createImgList
 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)
+@OptIn(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(" ")
 }
+
+private val suffix = listOf(
+    "B",
+    "kB",
+    "MB",
+    "GB",
+    "TB" //really?
+)
+
+fun byteToString(byte: Long, precision : Int = 1) : String {
+    var size = byte.toDouble(); var suffixIndex = 0
+
+    while (size >= 1024) {
+        size /= 1024
+        suffixIndex++
+    }
+
+    return "%.${precision}f ${suffix[suffixIndex]}".format(size)
+}
+
+/**
+ * Convert android generated ID to requestCode
+ * to prevent java.lang.IllegalArgumentException: Can only use lower 16 bits for requestCode
+ *
+ * https://stackoverflow.com/questions/38072322/generate-16-bit-unique-ids-in-android-for-startactivityforresult
+ */
+fun Int.normalizeID() = this.and(0xFFFF)
+
+fun OkHttpClient.Builder.proxyInfo(proxyInfo: ProxyInfo) = this.apply {
+    proxy(proxyInfo.proxy())
+    proxyInfo.authenticator()?.let {
+        proxyAuthenticator(it)
+    }
+}
+
+val formatMap = mapOf<String, GalleryBlock.() -> (String)>(
+    "-id-" to { id.toString() },
+    "-title-" to { title },
+    "-artist-" to { artists.joinToString() }
+    // TODO
+)
+/**
+ * Formats download folder name with given Metadata
+ */
+fun GalleryBlock.formatDownloadFolder(): String =
+    Preferences["download_folder_name", "[-id-] -title-"].let {
+        formatMap.entries.fold(it) { str, (k, v) ->
+            str.replace(k, v.invoke(this), true)
+        }
+    }.replace(Regex("""[*\\|"?><:/]"""), "").ellipsize(127)
+
+fun GalleryBlock.formatDownloadFolderTest(format: String): String =
+    format.let {
+        formatMap.entries.fold(it) { str, (k, v) ->
+            str.replace(k, v.invoke(this), true)
+        }
+    }.replace(Regex("""[*\\|"?><:/]"""), "").ellipsize(127)
+
+val Reader.requestBuilders: List<Request.Builder>
+    get() {
+        val galleryID = this.galleryInfo.id ?: 0
+        val lowQuality = Preferences["low_quality", true]
+
+        return when(code) {
+            Code.HITOMI -> {
+                this.galleryInfo.files.map {
+                    Request.Builder()
+                        .url(imageUrlFromImage(galleryID, it, !lowQuality))
+                        .header("Referer", getReferer(galleryID))
+                }
+            }
+            Code.HIYOBI -> {
+                createImgList(galleryID, this, lowQuality).map {
+                    Request.Builder()
+                        .url(it.path)
+                }
+            }
+        }
+    }
+
+fun String.ellipsize(n: Int): String =
+    if (this.length > n)
+        this.slice(0 until n) + "…"
+    else
+        this
+
+operator fun JsonElement.get(index: Int) =
+    this.jsonArray[index]
+
+operator fun JsonElement.get(tag: String) =
+    this.jsonObject[tag]

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

@@ -0,0 +1,58 @@
+/*
+ *     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
+
+import android.content.Context
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import okhttp3.Authenticator
+import okhttp3.Credentials
+import java.net.InetSocketAddress
+import java.net.Proxy
+
+@Serializable
+data class ProxyInfo(
+    val type: Proxy.Type,
+    val host: String? = null,
+    val port: Int? = null,
+    val username: String? = null,
+    val password: String? = null
+) {
+    fun proxy() : Proxy {
+        return if (host.isNullOrBlank() || port == null)
+            return Proxy.NO_PROXY
+        else
+            Proxy(type, InetSocketAddress.createUnresolved(host, port))
+    }
+
+    fun authenticator(): Authenticator? = if (username.isNullOrBlank() || password.isNullOrBlank()) null else
+            Authenticator { _, response ->
+                val credential = Credentials.basic(username, password)
+
+                response.request().newBuilder()
+                    .header("Proxy-Authorization", credential)
+                    .build()
+            }
+
+}
+
+fun getProxyInfo(): ProxyInfo =
+    Json.decodeFromString(Preferences["proxy", Json.encodeToString(ProxyInfo(Proxy.Type.DIRECT))])

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

@@ -0,0 +1,66 @@
+/*
+ *     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
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonPrimitive
+import okhttp3.Request
+import xyz.quaver.pupil.client
+import java.io.IOException
+import java.util.*
+
+private val filesURL = "https://api.github.com/repos/tom5079/Pupil/git/trees/tags"
+private val contentURL = "https://raw.githubusercontent.com/tom5079/Pupil/tags/"
+
+var translations: Map<String, String> = run {
+    updateTranslations()
+    emptyMap()
+}
+    private set
+
+@Suppress("BlockingMethodInNonBlockingContext")
+fun updateTranslations() = CoroutineScope(Dispatchers.IO).launch {
+    translations = emptyMap()
+    translations = Json.decodeFromString<Map<String, String>>(client.newCall(
+        Request.Builder()
+            .url(contentURL + "${Preferences["tag_language", ""]}.json")
+            .build()
+    ).execute().also { if (it.code() != 200) return@launch }.body()?.use { it.string() } ?: return@launch).filterValues { it.isNotEmpty() }
+}
+
+fun getAvailableLanguages(): List<String> {
+    val languages = Locale.getISOLanguages()
+
+    val json = Json.parseToJsonElement(client.newCall(
+        Request.Builder()
+            .url(filesURL)
+            .build()
+    ).execute().also { if (it.code() != 200) throw IOException() }.body()?.use { it.string() } ?: return emptyList())
+
+    return listOf("en") + (json["tree"]?.jsonArray?.mapNotNull {
+        val name = it["path"]?.jsonPrimitive?.content?.takeWhile { c -> c != '.' }
+
+        languages.firstOrNull { code -> code.equals(name, ignoreCase = true) }
+    } ?: emptyList())
+}

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

@@ -18,20 +18,57 @@
 
 package xyz.quaver.pupil.util
 
+import android.annotation.SuppressLint
+import android.app.DownloadManager
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
 import android.content.Context
-import kotlinx.serialization.InternalSerializationApi
-import kotlinx.serialization.internal.EnumSerializer
+import android.content.Intent
+import android.content.IntentFilter
+import android.net.Uri
+import android.util.Base64
+import android.webkit.URLUtil
+import androidx.appcompat.app.AlertDialog
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.*
-import xyz.quaver.availableInHiyobi
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.Request
+import okhttp3.Response
+import ru.noties.markwon.Markwon
+import xyz.quaver.hitomi.GalleryBlock
 import xyz.quaver.hitomi.Reader
+import xyz.quaver.hitomi.getGalleryBlock
+import xyz.quaver.hitomi.getReader
+import xyz.quaver.io.FileX
+import xyz.quaver.io.util.getChild
+import xyz.quaver.io.util.readText
+import xyz.quaver.io.util.writeBytes
+import xyz.quaver.io.util.writeText
 import xyz.quaver.pupil.BuildConfig
+import xyz.quaver.pupil.R
+import xyz.quaver.pupil.client
+import xyz.quaver.pupil.favorites
+import xyz.quaver.pupil.services.DownloadService
+import xyz.quaver.pupil.util.downloader.Cache
+import xyz.quaver.pupil.util.downloader.Metadata
 import java.io.File
+import java.io.IOException
 import java.net.URL
+import java.util.*
 
 fun getReleases(url: String) : JsonArray {
     return try {
         URL(url).readText().let {
-            Json(JsonConfiguration.Stable).parse(JsonArray.serializer(), it)
+            Json.parseToJsonElement(it).jsonArray
         }
     } catch (e: Exception) {
         JsonArray(emptyList())
@@ -45,81 +82,254 @@ fun checkUpdate(url: String) : JsonObject? {
         return null
 
     return releases.firstOrNull {
-        if (BuildConfig.PRERELEASE) {
-            true
-        } else {
-            it.jsonObject["prerelease"]?.boolean == false
-        }
+        Preferences["beta"] || it.jsonObject["prerelease"]?.jsonPrimitive?.booleanOrNull == false
     }?.let {
-        if (it.jsonObject["tag_name"]?.content == BuildConfig.VERSION_NAME)
+        if (it.jsonObject["tag_name"]?.jsonPrimitive?.contentOrNull == BuildConfig.VERSION_NAME)
             null
         else
             it.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 ?: "")
+        Regex("Pupil-v.+\\.apk").matches(it.jsonObject["name"]?.jsonPrimitive?.contentOrNull ?: "")
     }.let {
-        if (it == null)
-            null
-        else
-            Pair(it.jsonObject["browser_download_url"]?.content, it.jsonObject["name"]?.content)
+        it?.jsonObject?.get("browser_download_url")?.jsonPrimitive?.contentOrNull
     }
 }
 
-fun getOldReaderGalleries(context: Context) : List<File> {
-    val oldGallery = mutableListOf<File>()
+fun checkUpdate(context: Context, 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"]!!.jsonPrimitive.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"]?.jsonPrimitive?.contentOrNull, result.toString())
+    }
+
+    CoroutineScope(Dispatchers.Default).launch {
+        val update =
+            checkUpdate(context.getString(R.string.release_url)) ?: return@launch
+
+        val url = getApkUrl(update) ?: return@launch
+
+        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.ok) { _, _ ->
+                val downloadManager = context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
+
+                //Cancel any download queued before
+
+                val id: Long = Preferences["update_download_id"]
+
+                if (id != -1L)
+                    downloadManager.remove(id)
+
+                val target = File(context.getExternalFilesDir(null), "Pupil.apk").also {
+                    it.delete()
+                }
+
+                val request = DownloadManager.Request(Uri.parse(url))
+                    .setTitle(context.getText(R.string.update_notification_description))
+                    .setDestinationUri(Uri.fromFile(target))
+
+                downloadManager.enqueue(request).also {
+                    Preferences["update_download_id"] = it
+                }
+            }
+            setNegativeButton(if (force) android.R.string.cancel else R.string.ignore_update) { _, _ ->
+                if (!force)
+                    preferences.edit()
+                        .putLong("ignore_update_until", System.currentTimeMillis() + 604800000)
+                        .apply()
+            }
+        }
+
+        launch(Dispatchers.Main) {
+            dialog.show()
+        }
+    }
+}
+
+fun restore(url: String, onFailure: ((Throwable) -> Unit)? = null, onSuccess: ((List<Int>) -> Unit)? = null) {
+    if (!URLUtil.isValidUrl(url)) {
+        onFailure?.invoke(IllegalArgumentException())
+        return
+    }
+
+    val request = Request.Builder()
+        .url(url)
+        .get()
+        .build()
+
+    client.newCall(request).enqueue(object: Callback {
+        override fun onFailure(call: Call, e: IOException) {
+            onFailure?.invoke(e)
+        }
+
+        override fun onResponse(call: Call, response: Response) {
+            kotlin.runCatching {
+                Json.decodeFromString<List<Int>>(response.also { if (it.code() != 200) throw IOException() }.body().use { it?.string() } ?: "[]").let {
+                    favorites.addAll(it)
+                    onSuccess?.invoke(it)
+                }
+            }.onFailure { onFailure?.invoke(it) }
+        }
+    })
+}
+
+private var job: Job? = null
+private val receiver = object: BroadcastReceiver() {
+    val ACTION_CANCEL = "ACTION_IMPORT_CANCEL"
+    override fun onReceive(context: Context?, intent: Intent?) {
+        context ?: return
+
+        when (intent?.action) {
+            ACTION_CANCEL -> {
+                job?.cancel()
+                NotificationManagerCompat.from(context).cancel(R.id.notification_id_import)
+                context.unregisterReceiver(this)
+            }
         }
     }
-
-    return oldGallery
 }
+@SuppressLint("RestrictedApi")
+fun xyz.quaver.pupil.util.downloader.DownloadManager.migrate() {
+    registerReceiver(receiver, IntentFilter().apply { addAction(receiver.ACTION_CANCEL) })
 
-@UseExperimental(InternalSerializationApi::class)
-fun updateOldReaderGalleries(context: Context) {
+    val notificationManager = NotificationManagerCompat.from(this)
+    val action = NotificationCompat.Action.Builder(0, getText(android.R.string.cancel),
+        PendingIntent.getBroadcast(this, R.id.notification_import_cancel_action.normalizeID(), Intent(receiver.ACTION_CANCEL), PendingIntent.FLAG_UPDATE_CURRENT)
+    ).build()
+    val notification = NotificationCompat.Builder(this, "import")
+        .setContentTitle(getText(R.string.import_old_galleries_notification))
+        .setProgress(0, 0, true)
+        .addAction(action)
+        .setSmallIcon(R.drawable.ic_notification)
+        .setOngoing(true)
 
-    val json = Json(JsonConfiguration.Stable)
+    DownloadService.cancel(this)
 
-   getOldReaderGalleries(context).forEach { gallery ->
-       val reader = json.parseJson(File(gallery, "reader.json").apply {
-           if (!exists())
-               return@forEach
-       }.readText())
-           .jsonObject.toMutableMap()
+    job?.cancel()
+    job = CoroutineScope(Dispatchers.IO).launch {
+        val downloadFolders = downloadFolder.listFiles { folder ->
+            folder.isDirectory && !downloadFolderMap.values.contains(folder.name)
+        }?.map {
+            if (it !is FileX)
+                FileX(this@migrate, it)
+            else
+                it
+        }
 
-       val codeSerializer = EnumSerializer(Reader.Code::class)
+        if (downloadFolders.isNullOrEmpty()) return@launch
 
-       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)
-       }
+        downloadFolders.forEachIndexed { index, folder ->
+            notification
+                .setContentText(getString(R.string.import_old_galleries_notification_text, index, downloadFolders.size))
+                .setProgress(index, downloadFolders.size, false)
+            notificationManager.notify(R.id.notification_id_import, notification.build())
 
-       File(gallery, "reader.json").writeText(JsonObject(reader).toString())
-   }
+            kotlin.runCatching {
+                val metadata = kotlin.runCatching {
+                    folder.getChild(".metadata").readText()?.let { Json.parseToJsonElement(it).jsonObject }
+                }.getOrNull()
 
+                val galleryID = folder.name.toIntOrNull() ?: return@runCatching
+
+                val galleryBlock: GalleryBlock? = kotlin.runCatching {
+                    metadata?.get("galleryBlock")?.let { Json.decodeFromJsonElement<GalleryBlock>(it) }
+                }.getOrNull() ?: getGalleryBlock(galleryID)
+                val reader: Reader? = kotlin.runCatching {
+                    metadata?.get("reader")?.let { Json.decodeFromJsonElement<Reader>(it) }
+                }.getOrNull() ?: getReader(galleryID)
+
+                metadata?.get("thumbnail")?.jsonPrimitive?.contentOrNull?.also { thumbnail ->
+                    val file = folder.getChild(".thumbnail").also {
+                        if (it.exists())
+                            it.delete()
+                        it.createNewFile()
+                    }
+
+                    file.writeBytes(Base64.decode(thumbnail, Base64.DEFAULT))
+                }
+
+                val list: MutableList<String?> =
+                    MutableList(reader!!.galleryInfo.files.size) { null }
+
+                folder.listFiles { file ->
+                    file?.nameWithoutExtension?.let {
+                        Regex("""\d{5}""").matches(it) && it.toIntOrNull() != null
+                    } == true
+                }?.forEach {
+                    list[it.nameWithoutExtension.toInt()] = it.name
+                }
+
+                folder.getChild(".metadata").also { if (it.exists()) it.delete(); it.createNewFile() }.writeText(
+                    Json.encodeToString(Metadata(galleryBlock, reader, list))
+                )
+
+                synchronized(Cache) {
+                    Cache.delete(this@migrate, galleryID)
+                }
+                downloadFolderMap[galleryID] = folder.name
+
+                downloadFolder.getChild(".download").let { if (!it.exists()) it.createNewFile(); it.writeText(Json.encodeToString(downloadFolderMap)) }
+            }
+        }
+
+        notification
+            .setContentText(getText(R.string.import_old_galleries_notification_done))
+            .setProgress(0, 0, false)
+            .setOngoing(false)
+            .mActions.clear()
+        notificationManager.notify(R.id.notification_id_import, notification.build())
+
+        kotlin.runCatching {
+            unregisterReceiver(receiver)
+        }
+    }
 }

app/src/main/res/anim/shake.xml

@@ -0,0 +1,24 @@
+<?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/>.
+  -->
+
+<translate xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="300"
+    android:fromXDelta="0"
+    android:interpolator="@anim/shake_cycle"
+    android:toXDelta="10" />

app/src/main/res/anim/shake_cycle.xml

@@ -0,0 +1,21 @@
+<?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/>.
+  -->
+
+<cycleInterpolator xmlns:android="http://schemas.android.com/apk/res/android"
+    android:cycles="3" />

app/src/main/res/color/lock_fab.xml

@@ -0,0 +1,23 @@
+<?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/>.
+  -->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_enabled="false" android:color="@android:color/darker_gray"/>
+    <item android:color="@color/colorPrimary"/>
+</selector>