Fix a bug where autocorrection status would be wrong.

Change-Id: Ic220129dc59f585164dbf63591cd1c96de17fe6f

java/src/com/android/inputmethod/keyboard/MainKeyboardView.java

@@ -1460,7 +1460,7 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
             return "";
         }
         final Locale locale = SubtypeLocale.getSubtypeLocale(subtype);
-        return StringUtils.capitalizeFirstCharacter(locale.getLanguage(), locale);
+        return StringUtils.capitalizeFirstCodePoint(locale.getLanguage(), locale);
     }
 
     // Get InputMethodSubtype's middle display name in its locale.

java/src/com/android/inputmethod/latin/CapsModeUtils.java

@@ -41,7 +41,7 @@ public final class CapsModeUtils {
         if (WordComposer.CAPS_MODE_AUTO_SHIFT_LOCKED == capitalizeMode) {
             return s.toUpperCase(locale);
         } else if (WordComposer.CAPS_MODE_AUTO_SHIFTED == capitalizeMode) {
-            return StringUtils.toTitleCase(s, locale);
+            return StringUtils.capitalizeFirstCodePoint(s, locale);
         } else {
             return s;
         }

java/src/com/android/inputmethod/latin/StringUtils.java

@@ -106,16 +106,17 @@ public final class StringUtils {
         }
     }
 
-    public static String capitalizeFirstCharacter(final String s, final Locale locale) {
+    public static String capitalizeFirstCodePoint(final String s, final Locale locale) {
         if (s.length() <= 1) {
             return s.toUpperCase(locale);
         }
-        // Please refer to the comment below in {@link #toTitleCase(String,Locale)}.
+        // Please refer to the comment below in
+        // {@link #capitalizeFirstAndDowncaseRest(String,Locale)} as this has the same shortcomings
         final int cutoff = s.offsetByCodePoints(0, 1);
         return s.substring(0, cutoff).toUpperCase(locale) + s.substring(cutoff);
     }
 
-    public static String toTitleCase(final String s, final Locale locale) {
+    public static String capitalizeFirstAndDowncaseRest(final String s, final Locale locale) {
         if (s.length() <= 1) {
             return s.toUpperCase(locale);
         }

java/src/com/android/inputmethod/latin/SubtypeLocale.java

@@ -183,7 +183,7 @@ public final class SubtypeLocale {
             final Locale locale = LocaleUtils.constructLocaleFromString(localeString);
             displayName = locale.getDisplayName(displayLocale);
         }
-        return StringUtils.capitalizeFirstCharacter(displayName, displayLocale);
+        return StringUtils.capitalizeFirstCodePoint(displayName, displayLocale);
     }
 
     // InputMethodSubtype's display name in its locale.
@@ -243,7 +243,7 @@ public final class SubtypeLocale {
                 }
             }
         };
-        return StringUtils.capitalizeFirstCharacter(
+        return StringUtils.capitalizeFirstCodePoint(
                 getSubtypeName.runInLocale(sResources, displayLocale), displayLocale);
     }
 

java/src/com/android/inputmethod/latin/Suggest.java

@@ -394,7 +394,7 @@ public final class Suggest {
         if (isAllUpperCase) {
             sb.append(wordInfo.mWord.toUpperCase(locale));
         } else if (isFirstCharCapitalized) {
-            sb.append(StringUtils.toTitleCase(wordInfo.mWord, locale));
+            sb.append(StringUtils.capitalizeFirstCodePoint(wordInfo.mWord, locale));
         } else {
             sb.append(wordInfo.mWord);
         }

java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java

@@ -330,7 +330,7 @@ public final class AndroidSpellCheckerService extends SpellCheckerService
                 } else if (StringUtils.CAPITALIZE_FIRST == capitalizeType) {
                     for (int i = 0; i < mSuggestions.size(); ++i) {
                         // Likewise
-                        mSuggestions.set(i, StringUtils.toTitleCase(
+                        mSuggestions.set(i, StringUtils.capitalizeFirstCodePoint(
                                 mSuggestions.get(i).toString(), locale));
                     }
                 }

java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java

@@ -226,7 +226,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
         // If the lower case version is not in the dictionary, it's still possible
         // that we have an all-caps version of a word that needs to be capitalized
         // according to the dictionary. E.g. "GERMANS" only exists in the dictionary as "Germans".
-        return dict.isValidWord(StringUtils.toTitleCase(lowerCaseText, mLocale));
+        return dict.isValidWord(StringUtils.capitalizeFirstAndDowncaseRest(lowerCaseText, mLocale));
     }
 
     // Note : this must be reentrant

tests/src/com/android/inputmethod/keyboard/SpacebarTextTests.java

@@ -113,7 +113,7 @@ public class SpacebarTextTests extends AndroidTestCase {
             final String subtypeName = SubtypeLocale.getSubtypeDisplayName(subtype);
             final Locale locale = SubtypeLocale.getSubtypeLocale(subtype);
             final String spacebarText = MainKeyboardView.getShortDisplayName(subtype);
-            final String languageCode = StringUtils.capitalizeFirstCharacter(
+            final String languageCode = StringUtils.capitalizeFirstCodePoint(
                     locale.getLanguage(), locale);
             if (SubtypeLocale.isNoLanguage(subtype)) {
                 assertEquals(subtypeName, "", spacebarText);

tests/src/com/android/inputmethod/latin/StringUtilsTests.java

@@ -93,23 +93,43 @@ public class StringUtilsTests extends AndroidTestCase {
                 StringUtils.removeFromCsvIfExists("key", "key1,key,key3,key,key5"));
     }
 
-    public void testToTitleCase() {
+
+    public void testCapitalizeFirstCodePoint() {
         assertEquals("SSaa",
-                StringUtils.toTitleCase("ßaa", Locale.GERMAN));
+                StringUtils.capitalizeFirstCodePoint("ßaa", Locale.GERMAN));
         assertEquals("Aßa",
-                StringUtils.toTitleCase("aßa", Locale.GERMAN));
+                StringUtils.capitalizeFirstCodePoint("aßa", Locale.GERMAN));
         assertEquals("Iab",
-                StringUtils.toTitleCase("iab", Locale.ENGLISH));
+                StringUtils.capitalizeFirstCodePoint("iab", Locale.ENGLISH));
-        assertEquals("Camelcase",
+        assertEquals("cAmElCaSe",
-                StringUtils.toTitleCase("cAmElCaSe", Locale.ENGLISH));
+                StringUtils.capitalizeFirstCodePoint("cAmElCaSe", Locale.ENGLISH));
         assertEquals("İab",
-                StringUtils.toTitleCase("iab", new Locale("tr")));
+                StringUtils.capitalizeFirstCodePoint("iab", new Locale("tr")));
+        assertEquals("AİB",
+                StringUtils.capitalizeFirstCodePoint("AİB", new Locale("tr")));
+        assertEquals("A",
+                StringUtils.capitalizeFirstCodePoint("a", Locale.ENGLISH));
+        assertEquals("A",
+                StringUtils.capitalizeFirstCodePoint("A", Locale.ENGLISH));
+    }
+
+    public void testCapitalizeFirstAndDowncaseRest() {
+        assertEquals("SSaa",
+                StringUtils.capitalizeFirstAndDowncaseRest("ßaa", Locale.GERMAN));
+        assertEquals("Aßa",
+                StringUtils.capitalizeFirstAndDowncaseRest("aßa", Locale.GERMAN));
+        assertEquals("Iab",
+                StringUtils.capitalizeFirstAndDowncaseRest("iab", Locale.ENGLISH));
+        assertEquals("Camelcase",
+                StringUtils.capitalizeFirstAndDowncaseRest("cAmElCaSe", Locale.ENGLISH));
+        assertEquals("İab",
+                StringUtils.capitalizeFirstAndDowncaseRest("iab", new Locale("tr")));
         assertEquals("Aib",
-                StringUtils.toTitleCase("AİB", new Locale("tr")));
+                StringUtils.capitalizeFirstAndDowncaseRest("AİB", new Locale("tr")));
         assertEquals("A",
-                StringUtils.toTitleCase("a", Locale.ENGLISH));
+                StringUtils.capitalizeFirstAndDowncaseRest("a", Locale.ENGLISH));
         assertEquals("A",
-                StringUtils.toTitleCase("A", Locale.ENGLISH));
+                StringUtils.capitalizeFirstAndDowncaseRest("A", Locale.ENGLISH));
     }
 
     public void testGetCapitalizationType() {