Move locale-related utility methods to LocaleUtils.

Change-Id: I7e9e6e5bc4486d8618d0213b112308c3d305c15e

1 files changed, 51 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/LocaleUtils.java b/java/src/com/android/inputmethod/latin/LocaleUtils.java
index 054f1f9b8..efa9bfee3 100644
--- a/java/src/com/android/inputmethod/latin/LocaleUtils.java
+++ b/java/src/com/android/inputmethod/latin/LocaleUtils.java
@@ -16,8 +16,13 @@
 
 package com.android.inputmethod.latin;
 
+import android.content.res.Configuration;
+import android.content.res.Resources;
 import android.text.TextUtils;
 
+import java.util.HashMap;
+import java.util.Locale;
+
 /**
  * A class to help with handling Locales in string form.
  *
@@ -30,6 +35,10 @@ public class LocaleUtils {
 
     private final static String TAG = LocaleUtils.class.getSimpleName();
 
+    private LocaleUtils() {
+        // Intentional empty constructor for utility class.
+    }
+
     // Locale match level constants.
     // A higher level of match is guaranteed to have a higher numerical value.
     // Some room is left within constants to add match cases that may arise necessary
@@ -154,4 +163,46 @@ public class LocaleUtils {
     public static boolean isMatch(int level) {
         return LOCALE_MATCH <= level;
     }
+
+    /**
+     * Sets the system locale for this process.
+     *
+     * @param res the resources to use. Pass current resources.
+     * @param newLocale the locale to change to.
+     * @return the old locale.
+     */
+    public static Locale setSystemLocale(final Resources res, final Locale newLocale) {
+        final Configuration conf = res.getConfiguration();
+        final Locale saveLocale = conf.locale;
+        conf.locale = newLocale;
+        res.updateConfiguration(conf, res.getDisplayMetrics());
+        return saveLocale;
+    }
+
+    private static final HashMap<String, Locale> sLocaleCache = new HashMap<String, Locale>();
+
+    /**
+     * Creates a locale from a string specification.
+     */
+    public static Locale constructLocaleFromString(final String localeStr) {
+        if (localeStr == null)
+            return null;
+        synchronized (sLocaleCache) {
+            if (sLocaleCache.containsKey(localeStr))
+                return sLocaleCache.get(localeStr);
+            Locale retval = null;
+            String[] localeParams = localeStr.split("_", 3);
+            if (localeParams.length == 1) {
+                retval = new Locale(localeParams[0]);
+            } else if (localeParams.length == 2) {
+                retval = new Locale(localeParams[0], localeParams[1]);
+            } else if (localeParams.length == 3) {
+                retval = new Locale(localeParams[0], localeParams[1], localeParams[2]);
+            }
+            if (retval != null) {
+                sLocaleCache.put(localeStr, retval);
+            }
+            return retval;
+        }
+    }
 }