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      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 
     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.
     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}.
     45     protected abstract void executeBaseAction(int type);
     46 
     47     @Override
     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
     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 
     80     protected List<CustomAction> getCustomActions() {
     81         return mCustomActions;
     82     }
     83 }
     84