| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.dialer.dialpad; |
| |
| import android.telephony.PhoneNumberUtils; |
| import android.text.Spanned; |
| import android.text.method.DialerKeyListener; |
| |
| /** |
| * {@link DialerKeyListener} with Unicode support. Converts any Unicode(e.g. Arabic) characters |
| * that represent digits into digits before filtering the results so that we can support |
| * pasted digits from Unicode languages. |
| */ |
| public class UnicodeDialerKeyListener extends DialerKeyListener { |
| public static final UnicodeDialerKeyListener INSTANCE = new UnicodeDialerKeyListener(); |
| |
| @Override |
| public CharSequence filter(CharSequence source, int start, int end, |
| Spanned dest, int dstart, int dend) { |
| CharSequence converted = PhoneNumberUtils.replaceUnicodeDigits(source.toString()); |
| // PhoneNumberUtils.replaceUnicodeDigits performs a character for character replacement, |
| // so we can assume that start and end positions should remain unchanged. |
| CharSequence result = super.filter(converted, start, end, dest, dstart, dend); |
| if (result == null) { |
| if (source.equals(converted)) { |
| // There was no conversion or filtering performed. Just return null according to |
| // the behavior of DialerKeyListener. |
| return null; |
| } else { |
| // filter returns null if the charsequence is to be returned unchanged/unfiltered. |
| // But in this case we do want to return a modified character string (even if |
| // none of the characters in the modified string are filtered). So if |
| // result == null we return the unfiltered but converted numeric string instead. |
| return converted.subSequence(start, end); |
| } |
| } |
| return result; |
| } |
| } |