1 /*
2  * Copyright (C) 2015 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 
17 package com.android.tv.menu;
18 
19 import android.content.Context;
20 
21 import com.android.tv.customization.CustomAction;
22 
23 import java.util.ArrayList;
24 import java.util.List;
25 
26 /**
27  * An adapter of options that can accepts customization data.
28  */
29 public abstract class CustomizableOptionsRowAdapter extends OptionsRowAdapter {
30     private final List<CustomAction> mCustomActions;
31 
CustomizableOptionsRowAdapter(Context context, List<CustomAction> customActions)32     public CustomizableOptionsRowAdapter(Context context, List<CustomAction> customActions) {
33         super(context);
34         mCustomActions = customActions;
35     }
36 
37     // Subclass should implement this and return list of {@link MenuAction}.
38     // Custom actions will be added at the first or the last position in addition.
39     // Note that {@link MenuAction} should have non-negative type
40     // because negative types are reserved for custom actions.
createBaseActions()41     protected abstract List<MenuAction> createBaseActions();
42 
43     // Subclass should implement this to perform proper action
44     // for {@link MenuAction} with the given type returned by {@link createBaseActions}.
executeBaseAction(int type)45     protected abstract void executeBaseAction(int type);
46 
47     @Override
createActions()48     protected List<MenuAction> createActions() {
49         List<MenuAction> actions = new ArrayList<>(createBaseActions());
50 
51         if (mCustomActions != null) {
52             int position = 0;
53             for (int i = 0; i < mCustomActions.size(); i++) {
54                 // Type of MenuAction should be unique in the Adapter.
55                 int type = -(i + 1);
56                 CustomAction customAction = mCustomActions.get(i);
57                 MenuAction action = new MenuAction(
58                         customAction.getTitle(), type, customAction.getIconDrawable());
59 
60                 if (customAction.isFront()) {
61                     actions.add(position++, action);
62                 } else {
63                     actions.add(action);
64                 }
65             }
66         }
67         return actions;
68     }
69 
70     @Override
executeAction(int type)71     protected void executeAction(int type) {
72         if (type < 0) {
73             int position = -(type + 1);
74             getMainActivity().startActivitySafe(mCustomActions.get(position).getIntent());
75         } else {
76             executeBaseAction(type);
77         }
78     }
79 
getCustomActions()80     protected List<CustomAction> getCustomActions() {
81         return mCustomActions;
82     }
83 }
84