diff options
Diffstat (limited to 'java/com/android/dialer/app/dialpad/UnicodeDialerKeyListener.java')
-rw-r--r-- | java/com/android/dialer/app/dialpad/UnicodeDialerKeyListener.java | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/java/com/android/dialer/app/dialpad/UnicodeDialerKeyListener.java b/java/com/android/dialer/app/dialpad/UnicodeDialerKeyListener.java new file mode 100644 index 000000000..051daf46e --- /dev/null +++ b/java/com/android/dialer/app/dialpad/UnicodeDialerKeyListener.java @@ -0,0 +1,56 @@ +/* + * 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.app.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) { + final String converted = + PhoneNumberUtils.convertKeypadLettersToDigits( + 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; + } +} |