1 files changed, 56 insertions, 0 deletions
diff --git a/java/com/android/dialer/dialpadview/UnicodeDialerKeyListener.java b/java/com/android/dialer/dialpadview/UnicodeDialerKeyListener.java
new file mode 100644
index 000000000..e9201c0c2
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+++ b/java/com/android/dialer/dialpadview/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.dialpadview;
+
+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;
+  }
+}