1 /**
2  * Copyright (c) 2014, Google Inc.
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.mail.utils;
18 
19 import android.view.KeyEvent;
20 
21 /**
22  * Utility class for keyboard navigation.
23  */
24 public class KeyboardUtils {
25     /**
26      * Determine if the provided keycode is toward the start direction of the normal layout.
27      * This is used for keyboard navigation since the layouts are flipped for RTL.
28      */
isKeycodeDirectionStart(int keyCode, boolean isRtl)29     public static boolean isKeycodeDirectionStart(int keyCode, boolean isRtl) {
30         return (!isRtl && keyCode == KeyEvent.KEYCODE_DPAD_LEFT) ||
31                 (isRtl && keyCode == KeyEvent.KEYCODE_DPAD_RIGHT);
32     }
33 
34     /**
35      * Determine if the provided keycode is toward the end direction of the normal layout.
36      * This is used for keyboard navigation since the layouts are flipped for RTL.
37      */
isKeycodeDirectionEnd(int keyCode, boolean isRtl)38     public static boolean isKeycodeDirectionEnd(int keyCode, boolean isRtl) {
39         return (isRtl && keyCode == KeyEvent.KEYCODE_DPAD_LEFT) ||
40                 (!isRtl && keyCode == KeyEvent.KEYCODE_DPAD_RIGHT);
41     }
42 }
43