feat: Create HybridView Swift and Kotlin base

packages/react-native-nitro-modules/android/src/main/java/com/margelo/nitro/views/HybridView.kt

@@ -0,0 +1,36 @@
+package com.margelo.nitro.core
+
+import androidx.annotation.Keep
+import com.facebook.jni.HybridData
+import com.facebook.proguard.annotations.DoNotStrip
+
+/**
+ * A base class for all Kotlin-based Hybrid Views.
+ */
+@Keep
+@DoNotStrip
+abstract class HybridView: HybridObject {
+    /**
+     * Get the `UIView` this HybridView is holding.
+     *
+     * This value should not change during the lifetime of this `HybridView`.
+     */
+    @get:DoNotStrip
+    @get:Keep
+    abstract val view: View
+
+    /**
+     * Holds the native C++ instance.
+     * In `HybridView`, the C++ instance is a sub-class of `JHybridView`, such as one of it's specs.
+     * This is `null`, until `updateNative(..)` is called.
+     */
+    private var mHybridData: HybridData? = null
+
+    /**
+     * Must be called in the constructor of a subclass of `HybridObject`, to initialize the C++
+     * `JHybridObject` with a subclass of it.
+     */
+    override fun updateNative(hybridData: HybridData) {
+        mHybridData = hybridData
+    }
+}

packages/react-native-nitro-modules/ios/views/HybridView.swift

@@ -0,0 +1,25 @@
+//
+//  HybridView.swift
+//  NitroModules
+//
+//  Created by Marc Rousavy on 13.01.25.
+//
+
+#if canImport(UIKit)
+
+import Foundation
+import UIKit
+
+/**
+ * A base protocol for all Swift-based Hybrid Views.
+ */
+public protocol HybridView: HybridObject {
+  /**
+   * Get the ``UIView`` this HybridView is holding.
+   *
+   * This value should not change during the lifetime of this ``HybridView``.
+   */
+  var view: UIView { get }
+}
+
+#endif