feat(YouTube Music - AMOLED black theme): Add AMOLED black theme patch

extensions/music/src/main/java/app/revanced/extension/music/ThemeHelper.java

@@ -0,0 +1,72 @@
+package app.revanced.extension.music;
+
+import android.app.Activity;
+import android.graphics.Color;
+
+import androidx.annotation.Nullable;
+
+import app.revanced.extension.shared.Logger;
+import app.revanced.extension.shared.Utils;
+
+public class ThemeHelper {
+    @Nullable
+    private static Integer darkThemeColor;
+    private static int themeValue;
+
+    /**
+     * Injection point.
+     */
+    @SuppressWarnings("unused")
+    public static void setTheme(Enum<?> value) {
+        final int newOrdinalValue = value.ordinal();
+        if (themeValue != newOrdinalValue) {
+            themeValue = newOrdinalValue;
+            Logger.printDebug(() -> "Theme value: " + newOrdinalValue);
+        }
+    }
+
+    public static boolean isDarkTheme() {
+        return themeValue == 1;
+    }
+
+    public static void setActivityTheme(Activity activity) {
+        final var theme = "Theme.Music.Settings.Dark";
+        activity.setTheme(Utils.getResourceIdentifier(theme, "style"));
+    }
+
+    /**
+     * Injection point.
+     */
+    @SuppressWarnings("SameReturnValue")
+    private static String darkThemeResourceName() {
+        // Value is changed by Theme patch, if included.
+        return "@color/yt_black3";
+    }
+
+    /**
+     * @return The dark theme color as specified by the Theme patch (if included),
+     *         or the dark mode background color unpatched YT Music uses.
+     */
+    public static int getDarkThemeColor() {
+        if (darkThemeColor == null) {
+            darkThemeColor = getColorInt(darkThemeResourceName());
+        }
+        return darkThemeColor;
+    }
+
+    private static int getColorInt(String colorString) {
+        if (colorString.startsWith("#")) {
+            return Color.parseColor(colorString);
+        }
+        return Utils.getResourceColor(colorString);
+    }
+
+    public static int getBackgroundColor() {
+        return getDarkThemeColor();
+    }
+
+    public static int getForegroundColor() {
+        // Since we are not using a light theme, return a contrasting color.
+        return Color.WHITE;
+    }
+}

patches/src/main/kotlin/app/revanced/patches/music/layout/amoledblacktheme/AmoledBlackThemePatch.kt

@@ -0,0 +1,71 @@
+package app.revanced.patches.music.layout.amoledblacktheme
+
+import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
+import app.revanced.patcher.patch.bytecodePatch
+import app.revanced.patcher.patch.resourcePatch
+import app.revanced.patcher.util.smali.toInstructions
+import org.w3c.dom.Element
+
+val amoledBlackThemePatch = bytecodePatch(
+    name = "AMOLED black theme",
+    description = "Applies an AMOLED black theme for YouTube Music.",
+) {
+    val amoledBlackColor = "@android:color/black"
+
+    dependsOn(
+        resourcePatch {
+            execute {
+                document("res/values/colors.xml").use { document ->
+                    val resourcesNode = document.getElementsByTagName("resources").item(0) as Element
+
+                    for (i in 0 until resourcesNode.childNodes.length) {
+                        val node = resourcesNode.childNodes.item(i) as? Element ?: continue
+
+                        node.textContent = when (node.getAttribute("name")) {
+                            "yt_black0", "yt_black1", "yt_black1_opacity95", "yt_black1_opacity98", "yt_black2", "yt_black3",
+                            "yt_black4", "yt_status_bar_background_dark", "ytm_color_grey_12", "material_grey_850" -> amoledBlackColor
+
+                            else -> continue
+                        }
+                    }
+                }
+
+                // Set the navigation bar color to black
+                document("res/values/colors.xml").use { document ->
+                    val resourcesNode = document.getElementsByTagName("resources").item(0) as Element
+
+                    resourcesNode.appendChild(
+                        document.createElement("color").apply {
+                            setAttribute("name", "navigation_bar_color")
+                            textContent = amoledBlackColor
+                        }
+                    )
+                }
+            }
+        }
+    )
+
+    compatibleWith("com.google.android.apps.youtube.music")
+
+    execute {
+        // Modify the dark theme color
+        themeHelperFingerprint.method.apply {
+            val instructions = """
+                const-string v0, "$amoledBlackColor"
+                return-object v0
+            """.toInstructions()
+
+            addInstructions(themeHelperFingerprint.patternMatch!!.startIndex, instructions)
+        }
+
+        // Modify the navigation bar color
+        themeHelperFingerprint.method.apply {
+            val instructions = """
+                const-string v0, "$amoledBlackColor"
+                return-object v0
+            """.toInstructions()
+
+            addInstructions(themeHelperFingerprint.patternMatch!!.startIndex, instructions)
+        }
+    }
+}

patches/src/main/kotlin/app/revanced/patches/music/layout/amoledblacktheme/Fingerprints.kt

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+package app.revanced.patches.music.layout.amoledblacktheme
+
+import app.revanced.patcher.fingerprint
+import com.android.tools.smali.dexlib2.AccessFlags
+import com.android.tools.smali.dexlib2.Opcode
+
+internal val themeHelperFingerprint = fingerprint {
+    accessFlags(AccessFlags.PRIVATE, AccessFlags.STATIC)
+    returns("Ljava/lang/String;")
+    parameters()
+    opcodes(
+        Opcode.CONST_STRING,
+        Opcode.RETURN_OBJECT
+    )
+    custom { method, _ ->
+        (method.name == "darkThemeResourceName" || method.name == "navigationBarColorResourceName") &&
+                method.definingClass == "Lapp/revanced/extension/music/ThemeHelper;"
+    }
+}