Adding hacky utility function to calculate script code for a language.
diff --git a/src/com/android/i18n/addressinput/Util.java b/src/com/android/i18n/addressinput/Util.java
new file mode 100644
index 0000000..081e973
--- /dev/null
+++ b/src/com/android/i18n/addressinput/Util.java
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+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * 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.i18n.addressinput;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Utility functions used by the address widget.
+ *
+ * @author Lara Rennie
+ */
+public class Util {
+ public static final String LATIN_SCRIPT = "Latn";
+
+ // Only used internally.
+ private static final String CHINESE_SCRIPT = "Hans";
+ private static final String KOREAN_SCRIPT = "Kore";
+ private static final String JAPANESE_SCRIPT = "Jpan";
+ // These are in upper-case, since we convert the language code to upper case before doing
+ // string comparison.
+ private static final String CHINESE_LANGUAGE = "ZH";
+ private static final String JAPANESE_LANGUAGE = "JA";
+ private static final String KOREAN_LANGUAGE = "KO";
+
+ // Cannot instantiate this class - private constructor.
+ private Util() {}
+
+ /**
+ * Gets the script code for a particular language. This is a somewhat hacky replacement for ICU's
+ * class that does this properly. For our purposes, we only want to know if the address is in a
+ * CJK script or not, since that affects address formatting. We assume that the languageCode is
+ * well-formed and first search to see if there is a script code specified. If not, then we assume
+ * Chinese, Japanese and Korean are in their default scripts, and other languages are in Latin
+ * script.
+ */
+ public static String getScriptCode(String languageCode) {
+ // Convert to upper-case for easier comparison.
+ languageCode = languageCode.toUpperCase();
+ // Check to see if the language code contains a script modifier.
+ final Pattern languageCodePattern = Pattern.compile("\\w{2}[-_](\\w{4})");
+ Matcher m = languageCodePattern.matcher(languageCode);
+ if (m.lookingAt()) {
+ String script = m.group(1);
+ if (script.equals(LATIN_SCRIPT.toUpperCase())) {
+ return LATIN_SCRIPT;
+ }
+ }
+ // If the script was not explicitly specified as Latn, we ignore the script information and read
+ // the language tag instead. This would break for cases such as zh-Cyrl, but this is rare enough
+ // that we are not going to worry about it for now.
+ if (languageCode.startsWith(CHINESE_LANGUAGE)) {
+ // We don't distinguish between simplified and traditional Chinese here.
+ return CHINESE_SCRIPT;
+ } else if (languageCode.startsWith(JAPANESE_LANGUAGE)) {
+ return JAPANESE_SCRIPT;
+ } else if (languageCode.startsWith(KOREAN_LANGUAGE)) {
+ return KOREAN_SCRIPT;
+ }
+ // All Indic, Arabic and other scripts will be mislabelled by this function, but since we only
+ // want to distinguish between CJK and non-CJK, this is ok.
+ return LATIN_SCRIPT;
+ }
+}
diff --git a/test/com/android/i18n/addressinput/UtilTest.java b/test/com/android/i18n/addressinput/UtilTest.java
new file mode 100644
index 0000000..7cf1843
--- /dev/null
+++ b/test/com/android/i18n/addressinput/UtilTest.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * 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.i18n.addressinput;
+
+import junit.framework.TestCase;
+
+/**
+ * @author Lara Rennie
+ */
+public class UtilTest extends TestCase {
+
+ public void testGetScriptCodeLatinScript() throws Exception {
+ // Should recognise latin script in a variety of forms.
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("en"));
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("EN"));
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("zh-Latn"));
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("ja_LATN"));
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("ja_LATN-JP"));
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("ko-latn_JP"));
+ // Other non-CJK scripts are also labelled as Latin.
+ assertEquals(Util.LATIN_SCRIPT, Util.getScriptCode("ru"));
+ }
+
+ public void testGetScriptCodeCjkScript() throws Exception {
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("ko")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("KO")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("ja")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("ja-JP")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("zh-Hans")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("zh-Hans-CN")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("zh-Hant")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("zh-TW")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("zh_TW")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("ko")));
+ assertFalse(Util.LATIN_SCRIPT.equals(Util.getScriptCode("ko_KR")));
+ }
+}
