Add spellcheck and word suggestion to the prediction service

third_party/android_prediction/suggest/core/dictionary/digraph_utils.h

Index: third_party/android_prediction/suggest/core/dictionary/digraph_utils.h
diff --git a/third_party/android_prediction/suggest/core/dictionary/digraph_utils.h b/third_party/android_prediction/suggest/core/dictionary/digraph_utils.h
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+++ b/third_party/android_prediction/suggest/core/dictionary/digraph_utils.h
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+/*
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef DIGRAPH_UTILS_H
+#define DIGRAPH_UTILS_H
+
+#include "third_party/android_prediction/defines.h"
+
+namespace latinime {
+
+class DictionaryHeaderStructurePolicy;
+
+class DigraphUtils {
+ public:
+    typedef enum {
+        NOT_A_DIGRAPH_INDEX,
+        FIRST_DIGRAPH_CODEPOINT,
+        SECOND_DIGRAPH_CODEPOINT
+    } DigraphCodePointIndex;
+
+    typedef enum {
+        DIGRAPH_TYPE_NONE,
+        DIGRAPH_TYPE_GERMAN_UMLAUT,
+    } DigraphType;
+
+    typedef struct { int first; int second; int compositeGlyph; } digraph_t;
+
+    static bool hasDigraphForCodePoint(const DictionaryHeaderStructurePolicy *const headerPolicy,
+            const int compositeGlyphCodePoint);
+    static int getDigraphCodePointForIndex(const int compositeGlyphCodePoint,
+            const DigraphCodePointIndex digraphCodePointIndex);
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(DigraphUtils);
+    static DigraphType getDigraphTypeForDictionary(
+            const DictionaryHeaderStructurePolicy *const headerPolicy);
+    static int getAllDigraphsForDigraphTypeAndReturnSize(
+            const DigraphType digraphType, const digraph_t **const digraphs);
+    static const digraph_t *getDigraphForCodePoint(const int compositeGlyphCodePoint);
+    static const digraph_t *getDigraphForDigraphTypeAndCodePoint(
+            const DigraphType digraphType, const int compositeGlyphCodePoint);
+
+    static const digraph_t GERMAN_UMLAUT_DIGRAPHS[];
+    static const DigraphType USED_DIGRAPH_TYPES[];
+};
+} // namespace latinime
+#endif // DIGRAPH_UTILS_H