UIKit public LocalUIViewController (#501)

compose/ui/ui/src/uikitMain/kotlin/androidx/compose/ui/interop/LocalUIViewController.uikit.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.compose.ui.interop
+
+import androidx.compose.runtime.staticCompositionLocalOf
+import platform.UIKit.UIViewController
+
+/**
+ * public value to get UIViewController of Compose window for library authors.
+ * Maybe useful for features, like VideoPlayer and Bottom menus.
+ * Please use it careful and don't remove another views.
+ */
+val LocalUIViewController = staticCompositionLocalOf<UIViewController> {
+    error("CompositionLocal UIViewController not provided")
+}

compose/ui/ui/src/uikitMain/kotlin/androidx/compose/ui/window/ComposeWindow.uikit.kt

@@ -23,6 +23,7 @@ import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.geometry.Rect
 import androidx.compose.ui.input.InputMode
 import androidx.compose.ui.interop.LocalLayerContainer
+import androidx.compose.ui.interop.LocalUIViewController
 import androidx.compose.ui.native.ComposeLayer
 import androidx.compose.ui.platform.*
 import androidx.compose.ui.platform.DefaultInputModeManager
@@ -249,6 +250,7 @@ internal actual class ComposeWindow : UIViewController {
         layer.setContent(content = {
             CompositionLocalProvider(
                 LocalLayerContainer provides rootView,
+                LocalUIViewController provides this,
             ) {
                 content()
             }