1 files changed, 82 insertions, 0 deletions
diff --git a/src/com/android/launcher3/TranslucentDecor.java b/src/com/android/launcher3/TranslucentDecor.java
new file mode 100644
index 000000000..b50c02268
--- /dev/null
+++ b/src/com/android/launcher3/TranslucentDecor.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2013 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 com.android.launcher3;
+
+import android.app.Activity;
+import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
+
+public class TranslucentDecor {
+    private static final int SYSTEM_UI_FLAG_TRANSPARENT_STATUS = 0x00001000;
+    private static final int SYSTEM_UI_FLAG_TRANSPARENT_NAVIGATION = 0x00002000;
+
+    // Replace with SDK constants when available.
+    public static final int FLAG_TRANSLUCENT_STATUS = 0x04000000;
+    public static final int FLAG_TRANSLUCENT_NAVIGATION = 0x08000000;
+
+    // Behave properly on early K builds.
+    public static final boolean SYSUI_SUPPORTED = !hasSystemUiFlag("ALLOW_TRANSIENT") &&
+            hasSystemUiFlag("TRANSPARENT_STATUS") &&
+            hasSystemUiFlag("TRANSPARENT_NAVIGATION");
+
+    public static final boolean WM_SUPPORTED =
+            hasWindowManagerFlag("TRANSLUCENT_STATUS") &&
+            hasWindowManagerFlag("TRANSLUCENT_NAVIGATION");
+
+    private final View mTarget;
+
+    public TranslucentDecor(View target) {
+        mTarget = target;
+    }
+
+    public void requestTranslucentDecor(boolean translucent) {
+        int sysui = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
+        if (WM_SUPPORTED && mTarget.getContext() instanceof Activity) {
+            Window w = ((Activity) mTarget.getContext()).getWindow();
+            int wmFlags = FLAG_TRANSLUCENT_STATUS | FLAG_TRANSLUCENT_NAVIGATION;
+            if (translucent) {
+                w.addFlags(wmFlags);
+            } else {
+               w.clearFlags(wmFlags);
+            }
+        } else if (SYSUI_SUPPORTED) {  // Remove when droidfood platform is updated
+            if (translucent) {
+                sysui |= SYSTEM_UI_FLAG_TRANSPARENT_STATUS | SYSTEM_UI_FLAG_TRANSPARENT_NAVIGATION;
+            }
+        }
+        mTarget.setSystemUiVisibility(sysui);
+    }
+
+    private static boolean hasWindowManagerFlag(String name) {
+        try {
+            return WindowManager.LayoutParams.class.getField("FLAG_" + name) != null;
+        } catch (NoSuchFieldException e) {
+            return false;
+        }
+    }
+
+    private static boolean hasSystemUiFlag(String name) {
+        try {
+            return View.class.getField("SYSTEM_UI_FLAG_" + name) != null;
+        } catch (NoSuchFieldException e) {
+            return false;
+        }
+    }
+}