1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.launcher3.views; 17 18 import android.content.Context; 19 import android.content.ContextWrapper; 20 import android.view.ContextThemeWrapper; 21 import android.view.View.AccessibilityDelegate; 22 23 import com.android.launcher3.DeviceProfile; 24 import com.android.launcher3.dot.DotInfo; 25 import com.android.launcher3.model.data.ItemInfo; 26 27 /** 28 * An interface to be used along with a context for various activities in Launcher. This allows a 29 * generic class to depend on Context subclass instead of an Activity. 30 */ 31 public interface ActivityContext { 32 finishAutoCancelActionMode()33 default boolean finishAutoCancelActionMode() { 34 return false; 35 } 36 getDotInfoForItem(ItemInfo info)37 default DotInfo getDotInfoForItem(ItemInfo info) { 38 return null; 39 } 40 41 /** 42 * For items with tree hierarchy, notifies the activity to invalidate the parent when a root 43 * is invalidated 44 * @param info info associated with a root node. 45 */ invalidateParent(ItemInfo info)46 default void invalidateParent(ItemInfo info) { } 47 getAccessibilityDelegate()48 default AccessibilityDelegate getAccessibilityDelegate() { 49 return null; 50 } 51 52 /** 53 * The root view to support drag-and-drop and popup support. 54 */ getDragLayer()55 BaseDragLayer getDragLayer(); 56 getDeviceProfile()57 DeviceProfile getDeviceProfile(); 58 lookupContext(Context context)59 static ActivityContext lookupContext(Context context) { 60 if (context instanceof ActivityContext) { 61 return (ActivityContext) context; 62 } else if (context instanceof ContextThemeWrapper) { 63 return lookupContext(((ContextWrapper) context).getBaseContext()); 64 } else { 65 throw new IllegalArgumentException("Cannot find ActivityContext in parent tree"); 66 } 67 } 68 } 69