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diff --git a/native/src/proximity_info.h b/native/src/proximity_info.h
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+/*
+ * Copyright (C) 2011 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 LATINIME_PROXIMITY_INFO_H
+#define LATINIME_PROXIMITY_INFO_H
+
+#include <stdint.h>
+
+#include "defines.h"
+
+namespace latinime {
+
+class ProximityInfo {
+public:
+    ProximityInfo(const int maxProximityCharsSize, const int keyboardWidth,
+            const int keybaordHeight, const int gridWidth, const int gridHeight,
+            const uint32_t *proximityCharsArray);
+    ~ProximityInfo();
+    bool hasSpaceProximity(const int x, const int y) const;
+private:
+    int getStartIndexFromCoordinates(const int x, const int y) const;
+    const int MAX_PROXIMITY_CHARS_SIZE;
+    const int KEYBOARD_WIDTH;
+    const int KEYBOARD_HEIGHT;
+    const int GRID_WIDTH;
+    const int GRID_HEIGHT;
+    const int CELL_WIDTH;
+    const int CELL_HEIGHT;
+    uint32_t *mProximityCharsArray;
+};
+
+} // namespace latinime
+
+#endif // LATINIME_PROXIMITY_INFO_H