CustomizableOptionsRowAdapter.java revision 95961816a768da387f0b5523cf4363ace2044089 
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
17package com.android.tv.menu;
18
19import android.content.Context;
20import com.android.tv.customization.CustomAction;
21import java.util.ArrayList;
22import java.util.List;
23
24/** An adapter of options that can accepts customization data. */
25public abstract class CustomizableOptionsRowAdapter extends OptionsRowAdapter {
26    private final List<CustomAction> mCustomActions;
27
28    public CustomizableOptionsRowAdapter(Context context, List<CustomAction> customActions) {
29        super(context);
30        mCustomActions = customActions;
31    }
32
33    // Subclass should implement this and return list of {@link MenuAction}.
34    // Custom actions will be added at the first or the last position in addition.
35    // Note that {@link MenuAction} should have non-negative type
36    // because negative types are reserved for custom actions.
37    protected abstract List<MenuAction> createBaseActions();
38
39    // Subclass should implement this to perform proper action
40    // for {@link MenuAction} with the given type returned by {@link createBaseActions}.
41    protected abstract void executeBaseAction(int type);
42
43    @Override
44    protected List<MenuAction> createActions() {
45        List<MenuAction> actions = new ArrayList<>(createBaseActions());
46
47        if (mCustomActions != null) {
48            int position = 0;
49            for (int i = 0; i < mCustomActions.size(); i++) {
50                // Type of MenuAction should be unique in the Adapter.
51                int type = -(i + 1);
52                CustomAction customAction = mCustomActions.get(i);
53                MenuAction action =
54                        new MenuAction(
55                                customAction.getTitle(), type, customAction.getIconDrawable());
56
57                if (customAction.isFront()) {
58                    actions.add(position++, action);
59                } else {
60                    actions.add(action);
61                }
62            }
63        }
64        return actions;
65    }
66
67    @Override
68    protected void executeAction(int type) {
69        if (type < 0) {
70            int position = -(type + 1);
71            getMainActivity().startActivitySafe(mCustomActions.get(position).getIntent());
72        } else {
73            executeBaseAction(type);
74        }
75    }
76
77    protected List<CustomAction> getCustomActions() {
78        return mCustomActions;
79    }
80}
81