feat(YouTube - Theme): Disable gradient loading screen

src/main/kotlin/app/revanced/patches/youtube/layout/theme/ThemeBytecodePatch.kt

@@ -1,24 +1,50 @@
 package app.revanced.patches.youtube.layout.theme
 
+import app.revanced.extensions.exception
+import app.revanced.extensions.indexOfFirstWideLiteralInstructionValue
 import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
+import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
 import app.revanced.patcher.patch.BytecodePatch
 import app.revanced.patcher.patch.annotation.CompatiblePackage
 import app.revanced.patcher.patch.annotation.Patch
 import app.revanced.patcher.patch.options.types.StringPatchOption.Companion.stringPatchOption
+import app.revanced.patches.shared.settings.preference.impl.StringResource
+import app.revanced.patches.shared.settings.preference.impl.SwitchPreference
 import app.revanced.patches.youtube.layout.seekbar.SeekbarColorBytecodePatch
+import app.revanced.patches.youtube.layout.theme.fingerprints.UseGradientLoadingScreenFingerprint
+import app.revanced.patches.youtube.misc.integrations.IntegrationsPatch
+import app.revanced.patches.youtube.misc.settings.SettingsPatch
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
 
 @Patch(
     name = "Theme",
     description = "Applies a custom theme.",
-    dependencies = [LithoColorHookPatch::class, SeekbarColorBytecodePatch::class, ThemeResourcePatch::class],
+    dependencies = [
+        LithoColorHookPatch::class,
+        SeekbarColorBytecodePatch::class,
+        ThemeResourcePatch::class,
+        IntegrationsPatch::class,
+        SettingsPatch::class
+    ],
     compatiblePackages = [
-        CompatiblePackage("com.google.android.youtube")
+        CompatiblePackage(
+            "com.google.android.youtube",
+            [
+                "18.37.36",
+                "18.38.44 "
+            ]
+        )
     ]
 )
 @Suppress("unused")
-object ThemeBytecodePatch : BytecodePatch() {
+object ThemeBytecodePatch : BytecodePatch(
+    setOf(UseGradientLoadingScreenFingerprint)
+) {
     private const val INTEGRATIONS_CLASS_DESCRIPTOR =
-        "Lapp/revanced/integrations/patches/theme/ThemeLithoComponentsPatch;"
+        "Lapp/revanced/integrations/patches/theme/ThemePatch;"
+
+    internal const val GRADIENT_LOADING_SCREEN_AB_CONSTANT = 45412406L
 
     internal val darkThemeBackgroundColor by stringPatchOption(
         key = "darkThemeBackgroundColor",
@@ -35,6 +61,34 @@ object ThemeBytecodePatch : BytecodePatch() {
     )
 
     override fun execute(context: BytecodeContext) {
+        SettingsPatch.PreferenceScreen.LAYOUT.addPreferences(
+            SwitchPreference(
+                "revanced_gradient_loading_screen",
+                StringResource("revanced_gradient_loading_screen_title", "Enable gradient loading screen"),
+                StringResource(
+                    "revanced_gradient_loading_screen_summary_on",
+                    "Loading screen will have a gradient background"
+                ),
+                StringResource(
+                    "revanced_gradient_loading_screen_summary_off",
+                    "Loading screen will have a solid background"
+                ),
+            )
+        )
+
+        UseGradientLoadingScreenFingerprint.result?.mutableMethod?.apply {
+            val isEnabledIndex = indexOfFirstWideLiteralInstructionValue(GRADIENT_LOADING_SCREEN_AB_CONSTANT) + 3
+            val isEnabledRegister = getInstruction<OneRegisterInstruction>(isEnabledIndex - 1).registerA
+
+            addInstructions(
+                isEnabledIndex,
+                """
+                    invoke-static { }, $INTEGRATIONS_CLASS_DESCRIPTOR->gradientLoadingScreenEnabled()Z
+                    move-result v$isEnabledRegister
+                """
+            )
+        } ?: throw UseGradientLoadingScreenFingerprint.exception
+
         LithoColorHookPatch.lithoColorOverrideHook(INTEGRATIONS_CLASS_DESCRIPTOR, "getValue")
     }
 }

src/main/kotlin/app/revanced/patches/youtube/layout/theme/fingerprints/UseGradientLoadingScreenFingerprint.kt

@@ -0,0 +1,8 @@
+package app.revanced.patches.youtube.layout.theme.fingerprints
+
+import app.revanced.patches.youtube.layout.theme.ThemeBytecodePatch.GRADIENT_LOADING_SCREEN_AB_CONSTANT
+import app.revanced.util.patch.LiteralValueFingerprint
+
+object UseGradientLoadingScreenFingerprint : LiteralValueFingerprint(
+    literalSupplier = { GRADIENT_LOADING_SCREEN_AB_CONSTANT }
+)