feat: Add pure black theme (#2824)

Author: aliernfrog

app/src/main/java/app/revanced/manager/MainActivity.kt

@@ -81,6 +81,7 @@ class MainActivity : ComponentActivity() {
             )
             val theme by vm.prefs.theme.getAsState()
             val dynamicColor by vm.prefs.dynamicColor.getAsState()
+            val pureBlackTheme by vm.prefs.pureBlackTheme.getAsState()
 
             EventEffect(vm.legacyImportActivityFlow) {
                 try {
@@ -91,7 +92,8 @@ class MainActivity : ComponentActivity() {
 
             ReVancedManagerTheme(
                 darkTheme = theme == Theme.SYSTEM && isSystemInDarkTheme() || theme == Theme.DARK,
-                dynamicColor = dynamicColor
+                dynamicColor = dynamicColor,
+                pureBlackTheme = pureBlackTheme
             ) {
                 ReVancedManager(vm)
             }

app/src/main/java/app/revanced/manager/domain/manager/PreferencesManager.kt

@@ -9,6 +9,7 @@ class PreferencesManager(
     context: Context
 ) : BasePreferencesManager(context, "settings") {
     val dynamicColor = booleanPreference("dynamic_color", true)
+    val pureBlackTheme = booleanPreference("pure_black_theme", false)
     val theme = enumPreference("theme", Theme.SYSTEM)
 
     val api = stringPreference("api_url", "https://api.revanced.app")

app/src/main/java/app/revanced/manager/ui/screen/settings/GeneralSettingsScreen.kt

@@ -1,6 +1,7 @@
 package app.revanced.manager.ui.screen.settings
 
 import android.os.Build
+import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -96,6 +97,14 @@ fun GeneralSettingsScreen(
                     description = R.string.dynamic_color_description
                 )
             }
+            AnimatedVisibility(theme != Theme.LIGHT) {
+                BooleanItem(
+                    preference = prefs.pureBlackTheme,
+                    coroutineScope = coroutineScope,
+                    headline = R.string.pure_black_theme,
+                    description = R.string.pure_black_theme_description
+                )
+            }
         }
     }
 }

app/src/main/java/app/revanced/manager/ui/theme/Theme.kt

@@ -80,6 +80,7 @@ private val LightColorScheme = lightColorScheme(
 fun ReVancedManagerTheme(
     darkTheme: Boolean,
     dynamicColor: Boolean,
+    pureBlackTheme: Boolean,
     content: @Composable () -> Unit
 ) {
     val colorScheme = when {
@@ -93,6 +94,10 @@ fun ReVancedManagerTheme(
 
         darkTheme -> DarkColorScheme
         else -> LightColorScheme
+    }.let {
+        if (darkTheme && pureBlackTheme)
+            it.copy(background = Color.Black, surface = Color.Black)
+        else it
     }
 
     val view = LocalView.current

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

@@ -86,6 +86,8 @@
     <string name="contributors_description">View the contributors of ReVanced</string>
     <string name="dynamic_color">Dynamic color</string>
     <string name="dynamic_color_description">Adapt colors to the wallpaper</string>
+    <string name="pure_black_theme">Pure black theme</string>
+    <string name="pure_black_theme_description">Use pure black backgrounds for dark theme</string>
     <string name="theme">Theme</string>
     <string name="theme_description">Choose between light or dark theme</string>
     <string name="safeguards">Safeguards</string>