feat: adds new snippet region tag for Desktop Windowing

compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/DesktopWindowing.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2026 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
+ *
+ *     https://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 com.example.compose.snippets.adaptivelayouts
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.captionBar
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.isCaptionBarVisible
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.windowInsetsTopHeight
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+
+// [START android_compose_desktop_window_insets_title]
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+fun CaptionBar() {
+    if (WindowInsets.isCaptionBarVisible) {
+        Row(
+            modifier = Modifier
+                .windowInsetsTopHeight(WindowInsets.captionBar)
+                .fillMaxWidth()
+                .background(
+                    if (isSystemInDarkTheme())
+                        Color.White
+                    else Color.Black
+
+                ),
+            horizontalArrangement = Arrangement.Center,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                "Caption Bar Title",
+                style = MaterialTheme.typography.titleMedium,
+                modifier = Modifier.padding(4.dp)
+            )
+        }
+    }
+}
+// [END android_compose_desktop_window_insets_title]