1 files changed, 43 insertions, 0 deletions
diff --git a/src/com/android/launcher3/views/ActivityContext.java b/src/com/android/launcher3/views/ActivityContext.java
new file mode 100644
index 000000000..04100af7f
--- /dev/null
+++ b/src/com/android/launcher3/views/ActivityContext.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2018 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.views;
+
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.view.ContextThemeWrapper;
+
+/**
+ * An interface to be used along with a context. This allows a generic class to depend on Context
+ * subclass instead of an Activity.
+ */
+public interface ActivityContext {
+
+    default boolean finishAutoCancelActionMode() {
+        return false;
+    }
+
+    BaseDragLayer getDragLayer();
+
+    static ActivityContext lookupContext(Context context) {
+        if (context instanceof ActivityContext) {
+            return (ActivityContext) context;
+        } else if (context instanceof ContextThemeWrapper) {
+            return lookupContext(((ContextWrapper) context).getBaseContext());
+        } else {
+            throw new IllegalArgumentException("Cannot find ActivityContext in parent tree");
+        }
+    }
+}