1 files changed, 83 insertions, 3 deletions
diff --git a/java/src/com/android/inputmethod/latin/StringUtils.java b/java/src/com/android/inputmethod/latin/StringUtils.java
index 59ad28fc9..3ca209d34 100644
--- a/java/src/com/android/inputmethod/latin/StringUtils.java
+++ b/java/src/com/android/inputmethod/latin/StringUtils.java
@@ -106,10 +106,19 @@ public final class StringUtils {
         }
     }
 
-    public static String toTitleCase(final String s, final Locale locale) {
+    public static String capitalizeFirstCodePoint(final String s, final Locale locale) {
         if (s.length() <= 1) {
-            // TODO: is this really correct? Shouldn't this be s.toUpperCase()?
-            return s;
+            return s.toUpperCase(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 capitalizeFirstAndDowncaseRest(final String s, final Locale locale) {
+        if (s.length() <= 1) {
+            return s.toUpperCase(locale);
         }
         // TODO: fix the bugs below
         // - This does not work for Greek, because it returns upper case instead of title case.
@@ -213,4 +222,75 @@ public final class StringUtils {
         if (1 == capsCount) return CAPITALIZE_FIRST;
         return (letterCount == capsCount ? CAPITALIZE_ALL : CAPITALIZE_NONE);
     }
+
+    public static boolean isIdenticalAfterUpcase(final String text) {
+        final int len = text.length();
+        for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
+            final int codePoint = text.codePointAt(i);
+            if (Character.isLetter(codePoint) && !Character.isUpperCase(codePoint)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean isIdenticalAfterDowncase(final String text) {
+        final int len = text.length();
+        for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
+            final int codePoint = text.codePointAt(i);
+            if (Character.isLetter(codePoint) && !Character.isLowerCase(codePoint)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean isIdenticalAfterCapitalizeEachWord(final String text,
+            final String separators) {
+        boolean needCapsNext = true;
+        final int len = text.length();
+        for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
+            final int codePoint = text.codePointAt(i);
+            if (Character.isLetter(codePoint)) {
+                if ((needCapsNext && !Character.isUpperCase(codePoint))
+                        || (!needCapsNext && !Character.isLowerCase(codePoint))) {
+                    return false;
+                }
+            }
+            // We need a capital letter next if this is a separator.
+            needCapsNext = (-1 != separators.indexOf(codePoint));
+        }
+        return true;
+    }
+
+    // TODO: like capitalizeFirst*, this does not work perfectly for Dutch because of the IJ digraph
+    // which should be capitalized together in *some* cases.
+    public static String capitalizeEachWord(final String text, final String separators,
+            final Locale locale) {
+        final StringBuilder builder = new StringBuilder();
+        boolean needCapsNext = true;
+        final int len = text.length();
+        for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
+            final String nextChar = text.substring(i, text.offsetByCodePoints(i, 1));
+            if (needCapsNext) {
+                builder.append(nextChar.toUpperCase(locale));
+            } else {
+                builder.append(nextChar.toLowerCase(locale));
+            }
+            // We need a capital letter next if this is a separator.
+            needCapsNext = (-1 != separators.indexOf(nextChar.codePointAt(0)));
+        }
+        return builder.toString();
+    }
+
+    public static boolean containsAny(final String string, final String separators) {
+        final int len = separators.length();
+        for (int i = 0; i < len; i = separators.offsetByCodePoints(i, 1)) {
+            final int separator = separators.codePointAt(i);
+            if (-1 != string.indexOf(separator)) {
+                return true;
+            }
+        }
+        return false;
+    }
 }