Merge "Disable sentence-case for Georgian" into sc-dev am: 0946a97d06 am: 0d9d0d0521

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14489968

Change-Id: Ieaf81e27b4c6a783786a667ff4057b7ed781bc9c

core/java/com/android/internal/app/LocaleHelper.java

@@ -18,6 +18,7 @@ package com.android.internal.app;
 
 import android.annotation.IntRange;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.icu.text.CaseMap;
 import android.icu.text.ListFormatter;
 import android.icu.util.ULocale;
 import android.os.LocaleList;
@@ -35,43 +36,13 @@ public class LocaleHelper {
     /**
      * Sentence-case (first character uppercased).
      *
-     * <p>There is no good API available for this, not even in ICU.
-     * We can revisit this if we get some ICU support later.</p>
-     *
-     * <p>There are currently several tickets requesting this feature:</p>
-     * <ul>
-     * <li>ICU needs to provide an easy way to titlecase only one first letter
-     *   http://bugs.icu-project.org/trac/ticket/11729</li>
-     * <li>Add "initial case"
-     *    http://bugs.icu-project.org/trac/ticket/8394</li>
-     * <li>Add code for initialCase, toTitlecase don't modify after Lt,
-     *   avoid 49Ers, low-level language-specific casing
-     *   http://bugs.icu-project.org/trac/ticket/10410</li>
-     * <li>BreakIterator.getFirstInstance: Often you need to titlecase just the first
-     *   word, and leave the rest of the string alone.  (closed as duplicate)
-     *   http://bugs.icu-project.org/trac/ticket/8946</li>
-     * </ul>
-     *
-     * <p>A (clunky) option with the current ICU API is:</p>
-     * {{
-     *   BreakIterator breakIterator = BreakIterator.getSentenceInstance(locale);
-     *   String result = UCharacter.toTitleCase(locale,
-     *       source, breakIterator, UCharacter.TITLECASE_NO_LOWERCASE);
-     * }}
-     *
-     * <p>That also means creating a BreakIterator for each locale. Expensive...</p>
-     *
      * @param str the string to sentence-case.
      * @param locale the locale used for the case conversion.
      * @return the string converted to sentence-case.
      */
     public static String toSentenceCase(String str, Locale locale) {
-        if (str.isEmpty()) {
-            return str;
-        }
-        final int firstCodePointLen = str.offsetByCodePoints(0, 1);
-        return str.substring(0, firstCodePointLen).toUpperCase(locale)
-                + str.substring(firstCodePointLen);
+        // Titlecases only the character at index 0, don't touch anything else
+        return CaseMap.toTitle().wholeString().noLowercase().apply(locale, null, str);
     }
 
     /**