1/*
2 * Copyright (C) 2016 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 android.support.design.internal;
18
19import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP;
20
21import android.content.Context;
22import android.os.Parcel;
23import android.os.Parcelable;
24import android.support.annotation.NonNull;
25import android.support.annotation.RestrictTo;
26import android.support.v7.view.menu.MenuBuilder;
27import android.support.v7.view.menu.MenuItemImpl;
28import android.support.v7.view.menu.MenuPresenter;
29import android.support.v7.view.menu.MenuView;
30import android.support.v7.view.menu.SubMenuBuilder;
31import android.view.ViewGroup;
32
33/**
34 * @hide
35 */
36@RestrictTo(LIBRARY_GROUP)
37public class BottomNavigationPresenter implements MenuPresenter {
38    private MenuBuilder mMenu;
39    private BottomNavigationMenuView mMenuView;
40    private boolean mUpdateSuspended = false;
41    private int mId;
42
43    public void setBottomNavigationMenuView(BottomNavigationMenuView menuView) {
44        mMenuView = menuView;
45    }
46
47    @Override
48    public void initForMenu(Context context, MenuBuilder menu) {
49        mMenuView.initialize(mMenu);
50        mMenu = menu;
51    }
52
53    @Override
54    public MenuView getMenuView(ViewGroup root) {
55        return mMenuView;
56    }
57
58    @Override
59    public void updateMenuView(boolean cleared) {
60        if (mUpdateSuspended) return;
61        if (cleared) {
62            mMenuView.buildMenuView();
63        } else {
64            mMenuView.updateMenuView();
65        }
66    }
67
68    @Override
69    public void setCallback(Callback cb) {}
70
71    @Override
72    public boolean onSubMenuSelected(SubMenuBuilder subMenu) {
73        return false;
74    }
75
76    @Override
77    public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {}
78
79    @Override
80    public boolean flagActionItems() {
81        return false;
82    }
83
84    @Override
85    public boolean expandItemActionView(MenuBuilder menu, MenuItemImpl item) {
86        return false;
87    }
88
89    @Override
90    public boolean collapseItemActionView(MenuBuilder menu, MenuItemImpl item) {
91        return false;
92    }
93
94    public void setId(int id) {
95        mId = id;
96    }
97
98    @Override
99    public int getId() {
100        return mId;
101    }
102
103    @Override
104    public Parcelable onSaveInstanceState() {
105        SavedState savedState = new SavedState();
106        savedState.selectedItemId = mMenuView.getSelectedItemId();
107        return savedState;
108    }
109
110    @Override
111    public void onRestoreInstanceState(Parcelable state) {
112        if (state instanceof SavedState) {
113            mMenuView.tryRestoreSelectedItemId(((SavedState) state).selectedItemId);
114        }
115    }
116
117    public void setUpdateSuspended(boolean updateSuspended) {
118        mUpdateSuspended = updateSuspended;
119    }
120
121    static class SavedState implements Parcelable {
122        int selectedItemId;
123
124        SavedState() {}
125
126        SavedState(Parcel in) {
127            selectedItemId = in.readInt();
128        }
129
130        @Override
131        public int describeContents() {
132            return 0;
133        }
134
135        @Override
136        public void writeToParcel(@NonNull Parcel out, int flags) {
137            out.writeInt(selectedItemId);
138        }
139
140        public static final Creator<SavedState> CREATOR = new Creator<SavedState>() {
141            @Override
142            public SavedState createFromParcel(Parcel in) {
143                return new SavedState(in);
144            }
145
146            @Override
147            public SavedState[] newArray(int size) {
148                return new SavedState[size];
149            }
150        };
151    }
152}
153