Eric Erfanian | ccca315 | 2017-02-22 16:32:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 | |
Eric Erfanian | fc0eb8c | 2017-08-31 06:57:16 -0700 | [diff] [blame] | 17 | package com.android.dialer.dialpadview; |
Eric Erfanian | ccca315 | 2017-02-22 16:32:36 -0800 | [diff] [blame] | 18 | |
| 19 | import android.telephony.PhoneNumberUtils; |
| 20 | import android.text.Spanned; |
| 21 | import android.text.method.DialerKeyListener; |
| 22 | |
| 23 | /** |
| 24 | * {@link DialerKeyListener} with Unicode support. Converts any Unicode(e.g. Arabic) characters that |
| 25 | * represent digits into digits before filtering the results so that we can support pasted digits |
| 26 | * from Unicode languages. |
| 27 | */ |
| 28 | public class UnicodeDialerKeyListener extends DialerKeyListener { |
| 29 | |
| 30 | public static final UnicodeDialerKeyListener INSTANCE = new UnicodeDialerKeyListener(); |
| 31 | |
| 32 | @Override |
| 33 | public CharSequence filter( |
| 34 | CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { |
| 35 | final String converted = |
| 36 | PhoneNumberUtils.convertKeypadLettersToDigits( |
| 37 | PhoneNumberUtils.replaceUnicodeDigits(source.toString())); |
| 38 | // PhoneNumberUtils.replaceUnicodeDigits performs a character for character replacement, |
| 39 | // so we can assume that start and end positions should remain unchanged. |
| 40 | CharSequence result = super.filter(converted, start, end, dest, dstart, dend); |
| 41 | if (result == null) { |
| 42 | if (source.equals(converted)) { |
| 43 | // There was no conversion or filtering performed. Just return null according to |
| 44 | // the behavior of DialerKeyListener. |
| 45 | return null; |
| 46 | } else { |
| 47 | // filter returns null if the charsequence is to be returned unchanged/unfiltered. |
| 48 | // But in this case we do want to return a modified character string (even if |
| 49 | // none of the characters in the modified string are filtered). So if |
| 50 | // result == null we return the unfiltered but converted numeric string instead. |
| 51 | return converted.subSequence(start, end); |
| 52 | } |
| 53 | } |
| 54 | return result; |
| 55 | } |
| 56 | } |