Refactor content provider code from ContactsDict

Break contacts binary dictionary into two parts
- one that talks to contacts content provider and maintains
  local state. Includes a manager class and a content observer
- other one that just manages the dict code.

Change-Id: Ie8f89ac9ce174c803ff3168ee0bee5cbe7721d5b

1 files changed, 55 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/ContactsDictionaryUtils.java b/java/src/com/android/inputmethod/latin/ContactsDictionaryUtils.java
new file mode 100644
index 000000000..b77388434
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/ContactsDictionaryUtils.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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 com.android.inputmethod.latin;
+
+import com.android.inputmethod.latin.common.Constants;
+
+import java.util.Locale;
+
+/**
+ * Utility methods related contacts dictionary.
+ */
+public class ContactsDictionaryUtils {
+
+    /**
+     * Returns the index of the last letter in the word, starting from position startIndex.
+     */
+    public static int getWordEndPosition(final String string, final int len,
+            final int startIndex) {
+        int end;
+        int cp = 0;
+        for (end = startIndex + 1; end < len; end += Character.charCount(cp)) {
+            cp = string.codePointAt(end);
+            if (cp != Constants.CODE_DASH && cp != Constants.CODE_SINGLE_QUOTE
+                   && !Character.isLetter(cp)) {
+                break;
+            }
+        }
+        return end;
+    }
+
+    /**
+     * Returns true if the locale supports using first name and last name as bigrams.
+     */
+    public static boolean useFirstLastBigramsForLocale(final Locale locale) {
+        // TODO: Add firstname/lastname bigram rules for other languages.
+        if (locale != null && locale.getLanguage().equals(Locale.ENGLISH.getLanguage())) {
+            return true;
+        }
+        return false;
+    }
+}