Clean up before implementing i18n support

[lgpl/argeo-commons.git] / org.argeo.util / src / org / argeo / util / LocaleChoice.java

diff --git a/org.argeo.util/src/org/argeo/util/LocaleChoice.java b/org.argeo.util/src/org/argeo/util/LocaleChoice.java
new file mode 100644 (file)
index 0000000..aaf719d
--- /dev/null
+++ b/org.argeo.util/src/org/argeo/util/LocaleChoice.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * 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 org.argeo.util;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import javax.security.auth.callback.LanguageCallback;
+
+/** Choose in a list of locales. TODO: replace with {@link LanguageCallback} */
+public class LocaleChoice {
+       private List<Locale> availableLocales = new ArrayList<Locale>();
+
+       private Integer selectedIndex = null;
+       private Integer defaultIndex = null;
+
+       // public LocaleCallback(Integer defaultIndex, List<Locale>
+       // availableLocales) {
+       // this.availableLocales = Collections
+       // .unmodifiableList(new ArrayList<Locale>(availableLocales));
+       // this.defaultIndex = defaultIndex;
+       // this.selectedIndex = defaultIndex;
+       // }
+
+       /**
+        * Convenience constructor based on a comma separated list of iso codes (en,
+        * en_US, fr_CA, etc.). Default selection is default locale.
+        */
+       public LocaleChoice(String locales, Locale defaultLocale) {
+               if (locales == null || locales.trim().equals(""))
+                       return;
+               String[] codes = locales.split(",");
+               for (int i = 0; i < codes.length; i++) {
+                       String code = codes[i];
+                       // variant not supported
+                       int indexUnd = code.indexOf("_");
+                       Locale locale;
+                       if (indexUnd > 0) {
+                               String language = code.substring(0, indexUnd);
+                               String country = code.substring(indexUnd + 1);
+                               locale = new Locale(language, country);
+                       } else {
+                               locale = new Locale(code);
+                       }
+                       availableLocales.add(locale);
+                       if (locale.equals(defaultLocale))
+                               defaultIndex = i;
+               }
+
+               if (defaultIndex == null)
+                       defaultIndex = 0;
+
+               this.selectedIndex = defaultIndex;
+       }
+
+       public String[] getSupportedLocalesLabels() {
+               String[] labels = new String[availableLocales.size()];
+               for (int i = 0; i < availableLocales.size(); i++) {
+                       Locale locale = availableLocales.get(i);
+                       if (locale.getCountry().equals(""))
+                               labels[i] = locale.getDisplayLanguage(locale) + " ["
+                                               + locale.getLanguage() + "]";
+                       else
+                               labels[i] = locale.getDisplayLanguage(locale) + " ("
+                                               + locale.getDisplayCountry(locale) + ") ["
+                                               + locale.getLanguage() + "_" + locale.getCountry()
+                                               + "]";
+
+               }
+               return labels;
+       }
+
+       public Locale getSelectedLocale() {
+               if (selectedIndex == null)
+                       return null;
+               return availableLocales.get(selectedIndex);
+       }
+
+       public void setSelectedIndex(Integer selectedIndex) {
+               this.selectedIndex = selectedIndex;
+       }
+
+       public Integer getDefaultIndex() {
+               return defaultIndex;
+       }
+
+       public List<Locale> getAvailableLocales() {
+               return availableLocales;
+       }
+
+       public Locale getDefaultLocale() {
+               return availableLocales.get(getDefaultIndex());
+       }
+
+       public static void main(String[] args) {
+               for (String isoL : Locale.getISOLanguages()) {
+                       Locale locale = new Locale(isoL);
+                       System.out.println(isoL + "\t" + locale.getDisplayLanguage() + "\t"
+                                       + locale.getDisplayLanguage(locale));
+               }
+       }
+
+}