Initial commit

icons/.gitignore

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+/build

icons/build.gradle.kts

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+plugins {
+    id("com.android.library")
+    id("kotlin-android")
+    id("kotlin-android-extensions")
+}
+
+android {
+    compileSdk = sdk.versions.compileSdk.get().toInt()
+
+    defaultConfig {
+        minSdk = sdk.versions.minSdk.get().toInt()
+        targetSdk = sdk.versions.targetSdk.get().toInt()
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles("consumer-rules.pro")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                    getDefaultProguardFile("proguard-android-optimize.txt"),
+                    "proguard-rules.pro"
+            )
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+    implementation(libs.bundles.kotlin)
+    implementation(libs.androidx.core)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.androidx.palette)
+
+    implementation(libs.bundles.androidx.lifecycle)
+
+    implementation(project(":database"))
+    implementation(project(":preferences"))
+    implementation(project(":ktx"))
+    implementation(project(":base"))
+    implementation(project(":search"))
+    implementation(project(":crashreporter"))
+
+}

icons/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.kts.kts.kts.kts.kts.kts.kts.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

icons/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.mm20.launcher2.icons">
+
+    <queries>
+        <intent>
+            <action android:name="org.adw.ActivityStarter.THEMES" />
+        </intent>
+        <intent>
+            <action android:name="com.novalauncher.THEME" />
+        </intent>
+    </queries>
+</manifest>

icons/src/main/java/de/mm20/launcher2/icons/CalendarDynamicLauncherIcon.kt

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+package de.mm20.launcher2.icons
+
+import android.content.Context
+import android.content.pm.PackageManager
+import android.graphics.drawable.AdaptiveIconDrawable
+import android.graphics.drawable.Drawable
+import android.os.Build
+import de.mm20.launcher2.ktx.getDrawableOrNull
+import java.util.*
+import java.util.concurrent.Executors
+
+class CalendarDynamicLauncherIcon(
+        context: Context,
+        foreground: Drawable,
+        background: Drawable?,
+        foregroundScale: Float,
+        backgroundScale: Float,
+        badgeNumber: Float = 0f,
+        val packageName: String,
+        val drawableIds: IntArray,
+        autoGenerateBackgroundMode: Int
+) : DynamicLauncherIcon(
+        foreground,
+        background,
+        foregroundScale,
+        backgroundScale,
+        /** Not needed, we already have a background **/
+        autoGenerateBackgroundMode,
+        badgeNumber,
+        null
+) {
+
+    init {
+        DynamicIconController.getInstance(context).registerIcon(this)
+        update(context)
+    }
+
+    var currentDay = 0
+    override fun update(context: Context) {
+        val calendar = Calendar.getInstance()
+        val day = calendar[Calendar.DAY_OF_MONTH]
+        if (day == currentDay || drawableIds.size < currentDay) return
+        val resources = try {
+            context.packageManager.getResourcesForApplication(packageName)
+        } catch (e: PackageManager.NameNotFoundException) {
+            return
+        }
+        Executors.newSingleThreadExecutor().execute {
+            val currentDayDrawable = resources.getDrawableOrNull(drawableIds[day - 1])
+                    ?: return@execute
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && currentDayDrawable is AdaptiveIconDrawable) {
+                foreground = currentDayDrawable.foreground
+                background = currentDayDrawable.background
+                foregroundScale = 1.5f
+                backgroundScale = 1.5f
+            } else {
+                foregroundScale = 1f
+                backgroundScale = 1f
+                background = null
+                foreground = currentDayDrawable
+            }
+        }
+        currentDay = day
+    }
+}

icons/src/main/java/de/mm20/launcher2/icons/ClockDynamicLauncherIcon.kt

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+package de.mm20.launcher2.icons
+
+import android.content.Context
+import android.graphics.drawable.ColorDrawable
+import android.graphics.drawable.Drawable
+import android.graphics.drawable.LayerDrawable
+import android.graphics.drawable.RotateDrawable
+import android.os.Build
+import androidx.annotation.RequiresApi
+import java.util.*
+import kotlin.math.roundToInt
+
+@RequiresApi(Build.VERSION_CODES.O)
+class ClockDynamicLauncherIcon(
+        context: Context,
+        foreground: LayerDrawable,
+        background: Drawable?,
+        foregroundScale: Float,
+        backgroundScale: Float,
+        badgeNumber: Float,
+        val hourLayer: Int,
+        val minuteLayer: Int,
+        val secondLayer: Int
+) : DynamicLauncherIcon(
+        foreground,
+        background,
+        foregroundScale,
+        backgroundScale,
+        /** Not needed, we already have a background **/
+        LauncherIcon.BACKGROUND_WHITE,
+        badgeNumber,
+        null
+) {
+
+    init {
+        foreground.also {
+            it.setDrawable(secondLayer, ColorDrawable(0))
+            (it.getDrawable(hourLayer) as? RotateDrawable)?.fromDegrees = 0f
+            (it.getDrawable(hourLayer) as? RotateDrawable)?.toDegrees = 360f
+            (it.getDrawable(minuteLayer) as? RotateDrawable)?.fromDegrees = 0f
+            (it.getDrawable(minuteLayer) as? RotateDrawable)?.toDegrees = 360f
+        }
+        DynamicIconController.getInstance(context).registerIcon(this)
+        update(context)
+    }
+
+    override fun update(context: Context) {
+        val calendar = Calendar.getInstance()
+        val hourDegrees = calendar[Calendar.HOUR] / 12f * 10000 + calendar[Calendar.MINUTE] / 60f * 10000f / 12
+        val minuteDegrees = calendar[Calendar.MINUTE] / 60f * 10000
+        (foreground as LayerDrawable).also {
+            (it.getDrawable(hourLayer) as? RotateDrawable)?.level = hourDegrees.roundToInt()
+            (it.getDrawable(minuteLayer) as? RotateDrawable)?.level = minuteDegrees.roundToInt()
+        }
+        notifyCallbacks()
+    }
+}

icons/src/main/java/de/mm20/launcher2/icons/DynamicIconController.kt

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+package de.mm20.launcher2.icons
+
+import android.app.Activity
+import android.app.Application
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.util.Log
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleObserver
+import androidx.lifecycle.OnLifecycleEvent
+import java.lang.ref.WeakReference
+
+class DynamicIconController(val context: Context): LifecycleObserver {
+
+    private var timeReceiver: BroadcastReceiver? = null
+    private val registeredIcons = mutableListOf<WeakReference<DynamicLauncherIcon>>()
+
+    @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
+    fun resume() {
+        timeReceiver = object : BroadcastReceiver() {
+            override fun onReceive(context: Context, intent: Intent?) {
+                updateAllIcons(context)
+            }
+        }
+        val filter = IntentFilter(Intent.ACTION_TIME_TICK).also {
+            it.addAction(Intent.ACTION_TIME_CHANGED)
+            it.addAction(Intent.ACTION_TIMEZONE_CHANGED)
+        }
+        context.registerReceiver(timeReceiver, filter)
+        updateAllIcons(context)
+    }
+
+    private fun updateAllIcons(context: Context) {
+        val iterator = registeredIcons.iterator()
+        while (iterator.hasNext()) {
+            val iconRef = iterator.next()
+            if (iconRef.get() != null) iconRef.get()?.update(context)
+            else iterator.remove()
+        }
+    }
+
+    @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
+    fun pause() {
+        try {
+            context.unregisterReceiver(timeReceiver)
+        } catch (e: IllegalArgumentException) {
+
+        }
+        timeReceiver = null
+    }
+
+    fun registerIcon(icon: DynamicLauncherIcon) {
+        registeredIcons.add(WeakReference(icon))
+    }
+
+    companion object {
+        private lateinit var instance: DynamicIconController
+
+        fun getInstance(context: Context): DynamicIconController {
+            if(!::instance.isInitialized) instance = DynamicIconController(context.applicationContext)
+            return instance
+        }
+    }
+}

icons/src/main/java/de/mm20/launcher2/icons/DynamicLauncherIcon.kt

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+package de.mm20.launcher2.icons
+
+import android.content.Context
+import android.graphics.drawable.Drawable
+
+abstract class DynamicLauncherIcon(
+        foreground: Drawable,
+        background: Drawable?,
+        foregroundScale: Float,
+        backgroundScale: Float,
+        autoGenerateBackgroundMode: Int,
+        badgeNumber: Float,
+        badgeDrawable: Drawable?)
+    : LauncherIcon(
+        foreground,
+        background,
+        foregroundScale,
+        backgroundScale,
+        autoGenerateBackgroundMode
+) {
+    abstract fun update(context: Context)
+}

icons/src/main/java/de/mm20/launcher2/icons/Icon.kt

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+package de.mm20.launcher2.icons
+
+import android.content.ComponentName
+import de.mm20.launcher2.database.entities.IconEntity
+
+data class Icon(
+        val type: String,
+        val componentName: ComponentName?,
+        val drawable: String?,
+        val iconPack: String,
+        val scale: Float? = null
+) {
+    constructor(entity: IconEntity) : this(
+            type = entity.type,
+            componentName = entity.componentName,
+            drawable = entity.drawable,
+            iconPack = entity.iconPack,
+            scale = entity.scale
+    )
+
+    fun toDatabaseEntity(): IconEntity {
+        return IconEntity(
+                type = type,
+                componentName = componentName,
+                drawable = drawable,
+                iconPack = iconPack,
+                scale = scale
+        )
+    }
+}

icons/src/main/java/de/mm20/launcher2/icons/IconPack.kt

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+package de.mm20.launcher2.icons
+
+import de.mm20.launcher2.database.entities.IconPackEntity
+
+data class IconPack(
+        val name: String,
+        val packageName: String,
+        val version: String,
+        var scale: Float = 1f
+) {
+    constructor(entity: IconPackEntity) : this(
+            name = entity.name,
+            packageName = entity.packageName,
+            version = entity.packageName,
+            scale = entity.scale
+    )
+
+    fun toDatabaseEntity(): IconPackEntity {
+        return IconPackEntity(
+                name = name,
+                scale = scale,
+                version = version,
+                packageName = packageName
+        )
+    }
+}

icons/src/main/java/de/mm20/launcher2/icons/IconPackManager.kt

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+package de.mm20.launcher2.icons
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.pm.LauncherActivityInfo
+import android.content.pm.PackageManager
+import android.content.pm.ResolveInfo
+import android.content.res.Resources
+import android.content.res.XmlResourceParser
+import android.graphics.*
+import android.graphics.drawable.AdaptiveIconDrawable
+import android.graphics.drawable.BitmapDrawable
+import android.graphics.drawable.ColorDrawable
+import android.graphics.drawable.LayerDrawable
+import android.os.Build
+import android.os.UserHandle
+import android.util.DisplayMetrics
+import android.util.Log
+import androidx.core.content.res.ResourcesCompat
+import androidx.core.graphics.drawable.toBitmap
+import de.mm20.launcher2.crashreporter.CrashReporter
+import de.mm20.launcher2.database.AppDatabase
+import de.mm20.launcher2.ktx.dp
+import de.mm20.launcher2.ktx.obtainTypedArrayOrNull
+import de.mm20.launcher2.ktx.randomElementOrNull
+import de.mm20.launcher2.preferences.IconShape
+import de.mm20.launcher2.preferences.LauncherPreferences
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.xmlpull.v1.XmlPullParser
+import org.xmlpull.v1.XmlPullParserException
+import org.xmlpull.v1.XmlPullParserFactory
+import java.io.InputStreamReader
+import kotlin.math.roundToInt
+
+
+class IconPackManager private constructor(val context: Context) {
+    var selectedIconPack: String
+        get() {
+            return context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE)
+                    .getString(KEY_ICON_PACK, "")!!
+        }
+        set(value) {
+            Log.d("MM20", "Selected icon pack: $value")
+            context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE)
+                    .edit()
+                    .putString(KEY_ICON_PACK, value)
+                    .apply()
+        }
+
+
+    fun selectIconPack(iconPack: String) {
+        selectedIconPack = iconPack
+    }
+
+    fun getIcon(context: Context, activity: LauncherActivityInfo, size: Int): LauncherIcon? {
+        if (selectedIconPack.isEmpty()) return getDefaultIcon(context, activity)
+        return getFromPack(context, activity, size) ?: generateIcon(context, activity, size)
+    }
+
+    private fun getFromPack(context: Context, activity: LauncherActivityInfo, size: Int): LauncherIcon? {
+        val res = try {
+            context.packageManager.getResourcesForApplication(selectedIconPack)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Log.e("MM20", "Icon pack package $selectedIconPack not found!")
+            return getDefaultIcon(context, activity)
+        }
+        val iconDao = AppDatabase.getInstance(context).iconDao()
+        val component = ComponentName(activity.applicationInfo.packageName, activity.name)
+        val icon = iconDao.getIcon(component.flattenToString(), selectedIconPack)
+                ?: return generateIcon(context, activity, size)
+
+        if (icon.type == "calendar") {
+            return getIconPackCalendarIcon(context, icon.iconPack, icon.drawable ?: return null)
+        }
+        val drawableName = icon.drawable
+        val resId = res.getIdentifier(drawableName, "drawable", selectedIconPack).takeIf { it != 0 }
+                ?: return generateIcon(context, activity, size)
+        val drawable = ResourcesCompat.getDrawable(res, resId, context.theme) ?: return null
+        return when {
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && drawable is AdaptiveIconDrawable -> {
+                LauncherIcon(
+                        foreground = drawable.foreground,
+                        background = drawable.background,
+                        foregroundScale = 1.5f,
+                        backgroundScale = 1.5f
+                )
+            }
+            else -> {
+                LauncherIcon(
+                        foreground = drawable,
+                        foregroundScale = getScale(),
+                        autoGenerateBackgroundMode = LauncherPreferences.instance.legacyIconBg.toInt()
+                )
+            }
+        }
+    }
+
+
+    private fun generateIcon(context: Context, activity: LauncherActivityInfo, size: Int): LauncherIcon? {
+        val back = getIconBack()
+        val upon = getIconUpon()
+        val mask = getIconMask()
+        val scale = getPackScale()
+
+        if (back == null && upon == null && mask == null) {
+            return getDefaultIcon(context, activity)
+        }
+
+        val drawable = activity.getIcon(context.resources.displayMetrics.densityDpi)
+        val bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
+
+        val canvas = Canvas(bitmap)
+        val paint = Paint()
+        paint.isAntiAlias = true
+        paint.isFilterBitmap = true
+        paint.isDither = true
+
+
+        var inBounds: Rect
+        var outBounds: Rect
+
+        val icon = drawable.toBitmap(width = size, height = size)
+
+        inBounds = Rect(0, 0, icon.width, icon.height)
+        outBounds = Rect((bitmap.width * (1 - scale) * 0.5).roundToInt(),
+                (bitmap.height * (1 - scale) * 0.5).roundToInt(),
+                (bitmap.width - bitmap.width * (1 - scale) * 0.5).roundToInt(),
+                (bitmap.height - bitmap.height * (1 - scale) * 0.5).roundToInt())
+        canvas.drawBitmap(icon, inBounds, outBounds, paint)
+
+        val pack = selectedIconPack
+        val pm = context.packageManager
+        val res = try {
+            pm.getResourcesForApplication(pack)
+        } catch (e: Resources.NotFoundException) {
+            return getDefaultIcon(context, activity)
+        }
+
+        if (mask != null) {
+            res.getIdentifier(mask, "drawable", pack).takeIf { it != 0 }?.let {
+                paint.xfermode = PorterDuffXfermode(PorterDuff.Mode.DST_OUT)
+                val maskDrawable = ResourcesCompat.getDrawable(res, it, null) ?: return null
+                val maskBmp = maskDrawable.toBitmap(size, size)
+                inBounds = Rect(0, 0, maskBmp.width, maskBmp.height)
+                outBounds = Rect(0, 0, bitmap.width, bitmap.height)
+                canvas.drawBitmap(maskBmp, inBounds, outBounds, paint)
+            }
+        }
+        if (upon != null) {
+            res.getIdentifier(upon, "drawable", pack).takeIf { it != 0 }?.let {
+                paint.xfermode = PorterDuffXfermode(PorterDuff.Mode.SRC_OVER);
+                val maskDrawable = ResourcesCompat.getDrawable(res, it, null) ?: return null
+                val maskBmp = maskDrawable.toBitmap(size, size)
+                inBounds = Rect(0, 0, maskBmp.width, maskBmp.height)
+                outBounds = Rect(0, 0, bitmap.width, bitmap.height)
+                canvas.drawBitmap(maskBmp, inBounds, outBounds, paint)
+            }
+        }
+        if (back != null) {
+            res.getIdentifier(back, "drawable", pack).takeIf { it != 0 }?.let {
+                paint.xfermode = PorterDuffXfermode(PorterDuff.Mode.DST_OVER);
+                val maskDrawable = ResourcesCompat.getDrawable(res, it, null) ?: return null
+                val maskBmp = maskDrawable.toBitmap(size, size)
+                inBounds = Rect(0, 0, maskBmp.width, maskBmp.height)
+                outBounds = Rect(0, 0, bitmap.width, bitmap.height)
+                canvas.drawBitmap(maskBmp, inBounds, outBounds, paint)
+            }
+        }
+
+        return LauncherIcon(
+                foreground = BitmapDrawable(context.resources, bitmap),
+                foregroundScale = getScale(),
+                autoGenerateBackgroundMode = LauncherPreferences.instance.legacyIconBg.toInt()
+        )
+    }
+
+    private fun getDefaultIcon(context: Context, activity: LauncherActivityInfo): LauncherIcon? {
+        if (activity.applicationInfo.packageName == GOOGLE_DESK_CLOCK_PACKAGE_NAME) {
+            getGoogleDeskClockIcon(context)?.let { return it }
+        }
+        getCalendarIcon(context, activity)?.let { return it }
+        try {
+            val icon = activity.getIcon(context.resources.displayMetrics.densityDpi) ?: return null
+            when {
+                Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && icon is AdaptiveIconDrawable -> {
+                    return LauncherIcon(
+                            foreground = icon.foreground ?: return null,
+                            background = icon.background,
+                            foregroundScale = 1.5f,
+                            backgroundScale = 1.5f
+                    )
+                }
+                else -> {
+                    return LauncherIcon(
+                            foreground = icon,
+                            foregroundScale = getScale(),
+                            autoGenerateBackgroundMode = LauncherPreferences.instance.legacyIconBg.toInt()
+                    )
+                }
+            }
+        } catch (e: PackageManager.NameNotFoundException) {
+            return null
+        }
+    }
+
+    private fun getIconPackCalendarIcon(context: Context, iconPack: String, baseIconName: String): CalendarDynamicLauncherIcon? {
+        val resources = try {
+            context.packageManager.getResourcesForApplication(iconPack)
+        } catch (e: PackageManager.NameNotFoundException) {
+            return null
+        }
+        val drawableIds = (1..31).map {
+            val drawableName = baseIconName + it
+            val id = resources.getIdentifier(drawableName, "drawable", iconPack)
+            if (id == 0) return null
+            id
+        }.toIntArray()
+        return CalendarDynamicLauncherIcon(
+                context = context,
+                background = ColorDrawable(0),
+                foreground = ColorDrawable(0),
+                foregroundScale = 1.5f,
+                backgroundScale = 1.5f,
+                packageName = iconPack,
+                drawableIds = drawableIds,
+                autoGenerateBackgroundMode = LauncherPreferences.instance.legacyIconBg.toInt()
+        )
+    }
+
+    private fun getCalendarIcon(context: Context, activity: LauncherActivityInfo): CalendarDynamicLauncherIcon? {
+        val component = ComponentName(activity.applicationInfo.packageName, activity.name)
+        val pm = context.packageManager
+        val ai = try {
+            pm.getActivityInfo(component, PackageManager.GET_META_DATA)
+        } catch (e: PackageManager.NameNotFoundException) {
+            return null
+        }
+        val resources = pm.getResourcesForActivity(component)
+        var arrayId = ai.metaData?.getInt("com.teslacoilsw.launcher.calendarIconArray") ?: 0
+        if (arrayId == 0) arrayId = ai.metaData?.getInt("com.google.android.calendar.dynamic_icons")
+                ?: return null
+        if (arrayId == 0) return null
+        val typedArray = resources.obtainTypedArrayOrNull(arrayId) ?: return null
+        if (typedArray.length() != 31) {
+            typedArray.recycle()
+            return null
+        }
+        val drawableIds = IntArray(31)
+        for (i in 0 until 31) {
+            drawableIds[i] = typedArray.getResourceId(i, 0)
+        }
+        typedArray.recycle()
+        return CalendarDynamicLauncherIcon(
+                context = context,
+                background = ColorDrawable(0),
+                foreground = ColorDrawable(0),
+                foregroundScale = 1.5f,
+                backgroundScale = 1.5f,
+                packageName = component.packageName,
+                drawableIds = drawableIds,
+                autoGenerateBackgroundMode = LauncherPreferences.instance.legacyIconBg.toInt()
+        )
+    }
+
+    private fun getGoogleDeskClockIcon(context: Context): ClockDynamicLauncherIcon? {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return null
+        val pm = context.packageManager
+        val appInfo = pm.getApplicationInfo(GOOGLE_DESK_CLOCK_PACKAGE_NAME, PackageManager.GET_META_DATA)
+                ?: return null
+        val drawable = appInfo.metaData.getInt("com.google.android.apps.nexuslauncher.LEVEL_PER_TICK_ICON_ROUND")
+        val resources = pm.getResourcesForApplication(appInfo)
+        val baseIcon = try {
+            ResourcesCompat.getDrawable(resources, drawable, null) as? AdaptiveIconDrawable ?: return null
+        } catch (e: Resources.NotFoundException) {
+            return null
+        }
+        val foreground = baseIcon.foreground as? LayerDrawable ?: return null
+        val hourLayer = appInfo.metaData.getInt("com.google.android.apps.nexuslauncher.HOUR_LAYER_INDEX")
+        val minuteLayer = appInfo.metaData.getInt("com.google.android.apps.nexuslauncher.MINUTE_LAYER_INDEX")
+        val secondLayer = appInfo.metaData.getInt("com.google.android.apps.nexuslauncher.SECOND_LAYER_INDEX")
+        return ClockDynamicLauncherIcon(
+                context = context,
+                background = baseIcon.background,
+                backgroundScale = 1.5f,
+                foreground = foreground,
+                foregroundScale = 1.5f,
+                badgeNumber = 0f,
+                hourLayer = hourLayer,
+                minuteLayer = minuteLayer,
+                secondLayer = secondLayer
+        )
+    }
+
+    private fun getScale(): Float {
+        return when (LauncherPreferences.instance.iconShape) {
+            IconShape.CIRCLE, IconShape.PLATFORM_DEFAULT -> 0.7f
+            else -> 0.8f
+
+        }
+    }
+
+    private fun getIconBack(): String? {
+        val iconDao = AppDatabase.getInstance(context).iconDao()
+        val iconbacks = iconDao.getIconBacks(selectedIconPack)
+        return iconbacks.randomElementOrNull()
+    }
+
+    private fun getIconUpon(): String? {
+        val iconDao = AppDatabase.getInstance(context).iconDao()
+        val iconupons = iconDao.getIconUpons(selectedIconPack)
+        return iconupons.randomElementOrNull()
+    }
+
+    private fun getIconMask(): String? {
+        val iconDao = AppDatabase.getInstance(context).iconDao()
+        val iconmasks = iconDao.getIconMasks(selectedIconPack)
+        return iconmasks.randomElementOrNull()
+    }
+
+    private fun getPackScale(): Float {
+        val iconDao = AppDatabase.getInstance(context).iconDao()
+        return iconDao.getScale(selectedIconPack) ?: 1f
+    }
+
+    suspend fun getInstalledIconPacks(): List<IconPack> {
+        return withContext(Dispatchers.IO) {
+            AppDatabase.getInstance(context).iconDao().getInstalledIconPacks().map {
+                IconPack(it)
+            }
+        }
+    }
+
+    companion object {
+        const val GOOGLE_DESK_CLOCK_PACKAGE_NAME = "com.google.android.deskclock"
+        const val GOOGLE_CALENDAR_PACKAGE_NAME = "com.google.android.calendar"
+
+        private lateinit var instance: IconPackManager
+        fun getInstance(context: Context): IconPackManager {
+            if (!::instance.isInitialized) instance = IconPackManager(context.applicationContext)
+            return instance
+        }
+    }
+
+    @Synchronized
+    suspend fun updateIconPacks() {
+        withContext(Dispatchers.IO) {
+            UpdateIconPacksWorker(context).doWork()
+        }
+    }
+}
+
+
+class UpdateIconPacksWorker(val context: Context) {
+
+    fun doWork() {
+        val packs = loadInstalledPacks(context).map { it.activityInfo.packageName }
+        val iconDao = AppDatabase.getInstance(context).iconDao()
+        iconDao.uninstallIconPacksExcept(packs)
+
+        for (pack in packs) {
+            try {
+                val packInfo = context.packageManager.getPackageInfo(pack, 0)
+                val iconPack = IconPack(
+                        name = packInfo.applicationInfo.loadLabel(context.packageManager).toString(),
+                        packageName = pack,
+                        version = packInfo.versionName
+                )
+                //if (iconDao.isInstalled(iconPack)) continue
+                installIconPack(iconPack)
+            } catch (e: PackageManager.NameNotFoundException) {
+                continue
+            }
+        }
+    }
+
+    private fun loadInstalledPacks(context: Context): List<ResolveInfo> {
+        val packs = mutableListOf<ResolveInfo>()
+        val pm = context.packageManager
+        var intent = Intent("org.adw.ActivityStarter.THEMES")
+        val adwPacks = pm.queryIntentActivities(intent, 0)
+        packs.addAll(adwPacks)
+        intent = Intent("com.novalauncher.THEME")
+        val novaPacks = pm.queryIntentActivities(intent, 0)
+        novaPacks.forEach {
+            if (packs.none { p -> p.activityInfo.packageName == it.activityInfo.packageName }) packs.add(it)
+        }
+        packs.sortWith(ResolveInfo.DisplayNameComparator(pm))
+        return packs
+    }
+
+    private fun installIconPack(iconPack: IconPack) {
+        val pkgName = iconPack.packageName
+        try {
+            val res = context.packageManager.getResourcesForApplication(pkgName)
+            val parser: XmlPullParser
+            var inStream: InputStreamReader? = null
+            val xmlId = res.getIdentifier("appfilter", "xml", pkgName)
+            if (xmlId != 0) parser = res.getXml(xmlId)
+            else {
+                val rawId = res.getIdentifier("appfilter", "raw", pkgName)
+                if (rawId == 0) {
+                    Log.e("MM20", "Icon pack $pkgName has no appfilter.xml, neither in xml nor in raw")
+                    return
+                }
+                parser = XmlPullParserFactory.newInstance().newPullParser()
+                inStream = res.openRawResource(rawId).reader()
+                parser.setInput(inStream)
+            }
+
+            val icons = mutableListOf<Icon>()
+            val iconDao = AppDatabase.getInstance(context).iconDao()
+
+            loop@ while (parser.next() != XmlPullParser.END_DOCUMENT) {
+                if (parser.eventType != XmlPullParser.START_TAG) continue
+                when (parser.name) {
+                    "item" -> {
+                        val component = parser.getAttributeValue(null, "component")
+                                ?: continue@loop
+                        val drawable = parser.getAttributeValue(null, "drawable")
+                                ?: continue@loop
+                        if (component.length <= 14) continue@loop
+                        val componentName = ComponentName.unflattenFromString(component.substring(14, component.lastIndex))
+                                ?: continue@loop
+                        val icon = Icon(
+                                componentName = componentName,
+                                drawable = drawable,
+                                iconPack = pkgName,
+                                type = "app"
+                        )
+                        icons.add(icon)
+                    }
+                    "calendar" -> {
+                        val component = parser.getAttributeValue(null, "component")
+                                ?: continue@loop
+                        val drawable = parser.getAttributeValue(null, "prefix") ?: continue@loop
+                        if (component.length < 14) continue@loop
+                        val componentName = ComponentName.unflattenFromString(component.substring(14, component.lastIndex))
+                                ?: continue@loop
+
+                        val icon = Icon(
+                                componentName = componentName,
+                                drawable = drawable,
+                                iconPack = pkgName,
+                                type = "calendar"
+                        )
+                        icons.add(icon)
+                    }
+                    "iconback" -> {
+                        for (i in 0 until parser.attributeCount) {
+                            if (parser.getAttributeName(i).startsWith("img")) {
+                                val drawable = parser.getAttributeValue(i)
+                                val icon = Icon(
+                                        componentName = null,
+                                        drawable = drawable,
+                                        iconPack = pkgName,
+                                        type = "iconback"
+                                )
+                                icons.add(icon)
+                            }
+                        }
+                    }
+                    "iconupon" -> {
+                        for (i in 0 until parser.attributeCount) {
+                            if (parser.getAttributeName(i).startsWith("img")) {
+                                val drawable = parser.getAttributeValue(i)
+                                val icon = Icon(
+                                        componentName = null,
+                                        drawable = drawable,
+                                        iconPack = pkgName,
+                                        type = "iconupon"
+                                )
+                                icons.add(icon)
+                            }
+                        }
+                    }
+                    "iconmask" -> {
+                        for (i in 0 until parser.attributeCount) {
+                            if (parser.getAttributeName(i).startsWith("img")) {
+                                val drawable = parser.getAttributeValue(i)
+                                val icon = Icon(
+                                        componentName = null,
+                                        drawable = drawable,
+                                        iconPack = pkgName,
+                                        type = "iconmask"
+                                )
+                                icons.add(icon)
+                            }
+                        }
+                    }
+                    "scale" -> {
+                        val scale = parser.getAttributeValue(null, "factor")?.toFloatOrNull()
+                                ?: continue@loop
+                        iconPack.scale = scale
+                    }
+                }
+            }
+
+            iconDao.installIconPack(iconPack.toDatabaseEntity(), icons.map { it.toDatabaseEntity() })
+
+            (parser as? XmlResourceParser)?.close()
+            inStream?.close()
+
+            Log.d("MM20", "Icon pack has been installed successfully")
+        } catch (e: PackageManager.NameNotFoundException) {
+            Log.e("MM20", "Could not install icon pack $pkgName: package not found.")
+        } catch (e: XmlPullParserException) {
+            CrashReporter.logException(e)
+        }
+    }
+}
+
+private const val PREFERENCE_NAME = "icon_pack"
+private const val KEY_ICON_PACK = "icon_pack"
+private const val KEY_VERSION = "version"
+private const val KEY_ICONSCALE = "iconscale"

icons/src/main/java/de/mm20/launcher2/icons/IconRepository.kt

@@ -0,0 +1,67 @@
+package de.mm20.launcher2.icons
+
+import android.content.Context
+import android.util.Log
+import android.util.LruCache
+import de.mm20.launcher2.search.data.Searchable
+import kotlinx.coroutines.*
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+
+class IconRepository private constructor(val context: Context) {
+
+    private val scope = CoroutineScope(Job() + Dispatchers.Main)
+
+    private val cache = LruCache<String, LauncherIcon>(200)
+
+    fun getIcon(searchable: Searchable, size: Int): Flow<LauncherIcon> = flow {
+        var icon = cache.get(searchable.key)
+        if (icon != null) {
+            emit(icon)
+            return@flow
+        }
+        val placeholderIcon = withContext(Dispatchers.IO) {
+            searchable.getPlaceholderIcon(context)
+        }
+        emit(placeholderIcon)
+        icon = withContext(Dispatchers.IO) {
+            searchable.loadIconAsync(context, size)
+        }
+        if (icon != null) {
+            cache.put(searchable.key, icon)
+            emit(icon)
+        }
+    }
+
+    /**
+     * Returns the icon for the given Searchable if it was requested earlier and is still in cache.
+     * Returns `null` otherwise.
+     */
+    fun getIconIfCached(searchable: Searchable): LauncherIcon? {
+        return cache[searchable.key]
+    }
+
+    fun requestIconPackListUpdate() {
+        scope.launch {
+            IconPackManager.getInstance(context).updateIconPacks()
+        }
+    }
+
+    fun removeIconFromCache(searchable: Searchable) {
+        cache.remove(searchable.key)
+    }
+
+    fun clearCache() {
+        cache.evictAll()
+    }
+
+
+    companion object {
+        private lateinit var instance: IconRepository
+
+        fun getInstance(context: Context): IconRepository {
+            if (!::instance.isInitialized) instance = IconRepository(context.applicationContext)
+            return instance
+        }
+    }
+}