feat(youtube/custom-seekbar-color): change the color of the last watched progress bar https://github.com/inotia00/ReVanced_Extended/issues/748

src/main/kotlin/app/revanced/patches/youtube/misc/litho/fingerprints/LithoThemeFingerprint.kt

@@ -0,0 +1,19 @@
+package app.revanced.patches.youtube.misc.litho.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcode
+
+object LithoThemeFingerprint : MethodFingerprint(
+    returnType = "V",
+    access = AccessFlags.PROTECTED or AccessFlags.FINAL,
+    parameters = listOf("L"),
+    opcodes = listOf(
+        Opcode.IF_NEZ,
+        Opcode.IGET_OBJECT,
+        Opcode.INVOKE_VIRTUAL, // Paint.setColor: inject point
+        Opcode.RETURN_VOID
+    ),
+    customFingerprint = { it.name == "onBoundsChange" }
+)

src/main/kotlin/app/revanced/patches/youtube/misc/litho/patch/LithoThemePatch.kt

@@ -0,0 +1,65 @@
+package app.revanced.patches.youtube.misc.litho.patch
+
+import app.revanced.extensions.toErrorResult
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.addInstructions
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod
+import app.revanced.patches.shared.annotation.YouTubeCompatibility
+import app.revanced.patches.youtube.misc.litho.fingerprints.LithoThemeFingerprint
+import org.jf.dexlib2.iface.instruction.ReferenceInstruction
+import org.jf.dexlib2.iface.instruction.formats.Instruction35c
+import org.jf.dexlib2.iface.reference.MethodReference
+
+@Name("litho-theme-hook")
+@YouTubeCompatibility
+@Version("0.0.1")
+class LithoThemePatch : BytecodePatch(
+    listOf(
+        LithoThemeFingerprint
+    )
+) {
+    override fun execute(context: BytecodeContext): PatchResult {
+
+        LithoThemeFingerprint.result?.mutableMethod?.let {
+            with (it.implementation!!.instructions) {
+                for (index in size - 1 downTo 0) {
+                    val invokeInstruction = this[index] as? ReferenceInstruction ?: continue
+                    if ((invokeInstruction.reference as MethodReference).name != "setColor") continue
+                    insertIndex = index
+                    insertRegister = (this[index] as Instruction35c).registerD
+                    insertMethod = it
+                    break
+                }
+            }
+        } ?: return LithoThemeFingerprint.toErrorResult()
+
+        return PatchResultSuccess()
+    }
+
+    companion object {
+        private var offset = 0
+
+        private var insertIndex: Int = 0
+        private var insertRegister: Int = 0
+        private lateinit var insertMethod: MutableMethod
+
+
+        fun injectCall(
+            methodDescriptor: String
+        ) {
+            insertMethod.addInstructions(
+                insertIndex + offset, """
+                    invoke-static {v$insertRegister}, $methodDescriptor
+                    move-result v$insertRegister
+                    """
+            )
+            offset += 2
+        }
+    }
+}
+