diff --git a/java/src/com/android/inputmethod/keyboard/Keyboard.java b/java/src/com/android/inputmethod/keyboard/Keyboard.java
index 3a0bf53..3005920 100644
--- a/java/src/com/android/inputmethod/keyboard/Keyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/Keyboard.java
@@ -132,6 +132,7 @@
 
     // Variables for pre-computing nearest keys.
 
+    // TODO: Change GRID_WIDTH and GRID_HEIGHT to private.
     public final int GRID_WIDTH;
     public final int GRID_HEIGHT;
     private final int GRID_SIZE;
@@ -143,6 +144,8 @@
     /** Number of key widths from current touch point to search for nearest keys. */
     private static float SEARCH_DISTANCE = 1.2f;
 
+    private final ProximityInfo mProximityInfo;
+
     /**
      * Creates a keyboard from the given xml key layout file.
      * @param context the application or service context
@@ -171,6 +174,11 @@
         mDefaultHeight = mDefaultWidth;
         mId = id;
         loadKeyboard(context, xmlLayoutResId);
+        mProximityInfo = new ProximityInfo(mDisplayWidth, mDisplayHeight, GRID_WIDTH, GRID_HEIGHT);
+    }
+
+    public int getProximityInfo() {
+        return mProximityInfo.getNativeProximityInfo(this);
     }
 
     public List<Key> getKeys() {
@@ -345,7 +353,8 @@
         return mId != null && mId.isNumberKeyboard();
     }
 
-    private void computeNearestNeighbors() {
+    // TODO: Move this function to ProximityInfo and make this private.
+    public void computeNearestNeighbors() {
         // Round-up so we don't have any pixels outside the grid
         mCellWidth = (getMinWidth() + GRID_WIDTH - 1) / GRID_WIDTH;
         mCellHeight = (getHeight() + GRID_HEIGHT - 1) / GRID_HEIGHT;
@@ -369,6 +378,7 @@
                 mGridNeighbors[(y / mCellHeight) * GRID_WIDTH + (x / mCellWidth)] = cell;
             }
         }
+        mProximityInfo.setProximityInfo(mGridNeighbors);
     }
 
     public boolean isInside(Key key, int x, int y) {
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index 7fee022..25bf0e0 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -762,6 +762,8 @@
             canvas.translate(-key.mX - kbdPaddingLeft, -key.mY - kbdPaddingTop);
         }
 
+        // TODO: Move this function to ProximityInfo for getting rid of public declarations for
+        // GRID_WIDTH and GRID_HEIGHT
         if (DEBUG_KEYBOARD_GRID) {
             Paint p = new Paint();
             p.setStyle(Paint.Style.STROKE);
@@ -1028,7 +1030,7 @@
         mKeyboardActionListener.onCodeInput(Keyboard.CODE_CAPSLOCK, null, 0, 0);
     }
 
-    private void onDoubleTapShiftKey(@SuppressWarnings("unused") PointerTracker tracker) {
+    private void onDoubleTapShiftKey(PointerTracker tracker) {
         // When shift key is double tapped, the first tap is correctly processed as usual tap. And
         // the second tap is treated as this double tap event, so that we need not mark tracker
         // calling setAlreadyProcessed() nor remove the tracker from mPointerQueueueue.
diff --git a/java/src/com/android/inputmethod/keyboard/ProximityInfo.java b/java/src/com/android/inputmethod/keyboard/ProximityInfo.java
new file mode 100644
index 0000000..fe836c1
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/ProximityInfo.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2011 Google Inc.
+ *
+ * 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.keyboard;
+
+public class ProximityInfo {
+    public static final int MAX_PROXIMITY_CHARS_SIZE = 16;
+
+    private final int mDisplayWidth;
+    private final int mDisplayHeight;
+    private final int mGridWidth;
+    private final int mGridHeight;
+    private final int mGridSize;
+
+    ProximityInfo(int displayWidth, int displayHeight, int gridWidth, int gridHeight) {
+        mDisplayWidth = displayWidth;
+        mDisplayHeight = displayHeight;
+        mGridWidth = gridWidth;
+        mGridHeight = gridHeight;
+        mGridSize = mGridWidth * mGridHeight;
+    }
+
+    private int mNativeProximityInfo;
+    private native int setProximityInfoNative(int maxProximityCharsSize, int displayWidth,
+            int displayHeight, int gridWidth, int gridHeight, int[] proximityCharsArray);
+    private native void releaseProximityInfoNative(int nativeProximityInfo);
+
+    public final void setProximityInfo(int[][] gridNeighbors) {
+        int[] proximityCharsArray = new int[mGridSize * MAX_PROXIMITY_CHARS_SIZE];
+        for (int i = 0; i < mGridSize; ++i) {
+            final int proximityCharsLength = gridNeighbors[i].length;
+            for (int j = 0; j < MAX_PROXIMITY_CHARS_SIZE; ++j) {
+                int charCode = KeyDetector.NOT_A_KEY;
+                if (j < proximityCharsLength) {
+                    charCode = gridNeighbors[i][j];
+                }
+                proximityCharsArray[i * MAX_PROXIMITY_CHARS_SIZE + j] = charCode;
+            }
+        }
+        mNativeProximityInfo = setProximityInfoNative(MAX_PROXIMITY_CHARS_SIZE,
+                mDisplayWidth, mDisplayHeight, mGridWidth, mGridHeight, proximityCharsArray);
+    }
+
+    // TODO: Get rid of this function's input (keyboard).
+    public int getNativeProximityInfo(Keyboard keyboard) {
+        if (mNativeProximityInfo == 0) {
+            // TODO: Move this function to ProximityInfo and make this private.
+            keyboard.computeNearestNeighbors();
+        }
+        return mNativeProximityInfo;
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        try {
+            if (mNativeProximityInfo != 0) {
+                releaseProximityInfoNative(mNativeProximityInfo);
+                mNativeProximityInfo = 0;
+            }
+        } finally {
+            super.finalize();
+        }
+    }
+}
diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index ff7e2b8..33b8c7a 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -16,6 +16,9 @@
 
 package com.android.inputmethod.latin;
 
+import com.android.inputmethod.keyboard.KeyboardSwitcher;
+import com.android.inputmethod.keyboard.ProximityInfo;
+
 import android.content.Context;
 import android.content.res.AssetFileDescriptor;
 import android.util.Log;
@@ -34,10 +37,10 @@
      * It is necessary to keep it at this value because some languages e.g. German have
      * really long words.
      */
-    protected static final int MAX_WORD_LENGTH = 48;
+    public static final int MAX_WORD_LENGTH = 48;
 
     private static final String TAG = "BinaryDictionary";
-    private static final int MAX_ALTERNATIVES = 16;
+    private static final int MAX_PROXIMITY_CHARS_SIZE = ProximityInfo.MAX_PROXIMITY_CHARS_SIZE;
     private static final int MAX_WORDS = 18;
     private static final int MAX_BIGRAMS = 60;
 
@@ -47,19 +50,13 @@
     private int mDicTypeId;
     private int mNativeDict;
     private long mDictLength;
-    private final int[] mInputCodes = new int[MAX_WORD_LENGTH * MAX_ALTERNATIVES];
+    private final int[] mInputCodes = new int[MAX_WORD_LENGTH * MAX_PROXIMITY_CHARS_SIZE];
     private final char[] mOutputChars = new char[MAX_WORD_LENGTH * MAX_WORDS];
     private final char[] mOutputChars_bigrams = new char[MAX_WORD_LENGTH * MAX_BIGRAMS];
     private final int[] mFrequencies = new int[MAX_WORDS];
     private final int[] mFrequencies_bigrams = new int[MAX_BIGRAMS];
 
-    static {
-        try {
-            System.loadLibrary("jni_latinime");
-        } catch (UnsatisfiedLinkError ule) {
-            Log.e(TAG, "Could not load native library jni_latinime");
-        }
-    }
+    private final KeyboardSwitcher mKeyboardSwitcher = KeyboardSwitcher.getInstance();
 
     private BinaryDictionary() {
     }
@@ -117,8 +114,9 @@
             int maxWords, int maxAlternatives);
     private native void closeNative(int dict);
     private native boolean isValidWordNative(int nativeData, char[] word, int wordLength);
-    private native int getSuggestionsNative(int dict, int[] inputCodes, int codesSize,
-            char[] outputChars, int[] frequencies);
+    private native int getSuggestionsNative(int dict, int proximityInfo, int[] xCoordinates,
+            int[] yCoordinates, int[] inputCodes, int codesSize, char[] outputChars,
+            int[] frequencies);
     private native int getBigramsNative(int dict, char[] prevWord, int prevWordLength,
             int[] inputCodes, int inputCodesLength, char[] outputChars, int[] frequencies,
             int maxWordLength, int maxBigrams, int maxAlternatives);
@@ -126,7 +124,7 @@
     private final void loadDictionary(String path, long startOffset, long length) {
         mNativeDict = openNative(path, startOffset, length,
                     TYPED_LETTER_MULTIPLIER, FULL_WORD_FREQ_MULTIPLIER,
-                    MAX_WORD_LENGTH, MAX_WORDS, MAX_ALTERNATIVES);
+                    MAX_WORD_LENGTH, MAX_WORDS, MAX_PROXIMITY_CHARS_SIZE);
         mDictLength = length;
     }
 
@@ -143,11 +141,11 @@
         Arrays.fill(mInputCodes, -1);
         int[] alternatives = codes.getCodesAt(0);
         System.arraycopy(alternatives, 0, mInputCodes, 0,
-                Math.min(alternatives.length, MAX_ALTERNATIVES));
+                Math.min(alternatives.length, MAX_PROXIMITY_CHARS_SIZE));
 
         int count = getBigramsNative(mNativeDict, chars, chars.length, mInputCodes, codesSize,
                 mOutputChars_bigrams, mFrequencies_bigrams, MAX_WORD_LENGTH, MAX_BIGRAMS,
-                MAX_ALTERNATIVES);
+                MAX_PROXIMITY_CHARS_SIZE);
 
         for (int j = 0; j < count; ++j) {
             if (mFrequencies_bigrams[j] < 1) break;
@@ -174,14 +172,16 @@
         Arrays.fill(mInputCodes, WordComposer.NOT_A_CODE);
         for (int i = 0; i < codesSize; i++) {
             int[] alternatives = codes.getCodesAt(i);
-            System.arraycopy(alternatives, 0, mInputCodes, i * MAX_ALTERNATIVES,
-                    Math.min(alternatives.length, MAX_ALTERNATIVES));
+            System.arraycopy(alternatives, 0, mInputCodes, i * MAX_PROXIMITY_CHARS_SIZE,
+                    Math.min(alternatives.length, MAX_PROXIMITY_CHARS_SIZE));
         }
         Arrays.fill(mOutputChars, (char) 0);
         Arrays.fill(mFrequencies, 0);
 
-        int count = getSuggestionsNative(mNativeDict, mInputCodes, codesSize, mOutputChars,
-                mFrequencies);
+        int count = getSuggestionsNative(
+                mNativeDict, mKeyboardSwitcher.getLatinKeyboard().getProximityInfo(),
+                codes.getXCoordinates(), codes.getYCoordinates(), mInputCodes, codesSize,
+                mOutputChars, mFrequencies);
 
         for (int j = 0; j < count; ++j) {
             if (mFrequencies[j] < 1) break;
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 39a83ef..32f4046 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -203,6 +203,14 @@
 
     private final ArrayList<WordAlternatives> mWordHistory = new ArrayList<WordAlternatives>();
 
+    static {
+        try {
+            System.loadLibrary("jni_latinime");
+        } catch (UnsatisfiedLinkError ule) {
+            Log.e(TAG, "Could not load native library jni_latinime");
+        }
+    }
+
     public abstract static class WordAlternatives {
         protected CharSequence mChosenWord;
 
@@ -1125,7 +1133,7 @@
             if (isWordSeparator(primaryCode)) {
                 handleSeparator(primaryCode);
             } else {
-                handleCharacter(primaryCode, keyCodes);
+                handleCharacter(primaryCode, keyCodes, x, y);
             }
             // Cancel the just reverted state
             mJustReverted = false;
@@ -1250,7 +1258,7 @@
         }
     }
 
-    private void handleCharacter(int primaryCode, int[] keyCodes) {
+    private void handleCharacter(int primaryCode, int[] keyCodes, int x, int y) {
         mVoiceConnector.handleCharacter();
 
         if (mLastSelectionStart == mLastSelectionEnd && TextEntryState.isCorrecting()) {
@@ -1291,7 +1299,7 @@
                 mWord.setFirstCharCapitalized(true);
             }
             mComposing.append((char) code);
-            mWord.add(code, keyCodes);
+            mWord.add(code, keyCodes, x, y);
             InputConnection ic = getCurrentInputConnection();
             if (ic != null) {
                 // If it's the first letter, make note of auto-caps state
@@ -1710,7 +1718,7 @@
             for (int i = 0; i < touching.mWord.length(); i++) {
                 foundWord.add(touching.mWord.charAt(i), new int[] {
                     touching.mWord.charAt(i)
-                });
+                }, WordComposer.NOT_A_COORDINATE, WordComposer.NOT_A_COORDINATE);
             }
             foundWord.setFirstCharCapitalized(Character.isUpperCase(touching.mWord.charAt(0)));
         }
diff --git a/java/src/com/android/inputmethod/latin/WordComposer.java b/java/src/com/android/inputmethod/latin/WordComposer.java
index e003dcd..0258389 100644
--- a/java/src/com/android/inputmethod/latin/WordComposer.java
+++ b/java/src/com/android/inputmethod/latin/WordComposer.java
@@ -24,18 +24,24 @@
  * A place to store the currently composing word with information such as adjacent key codes as well
  */
 public class WordComposer {
+
     public static final int NOT_A_CODE = KeyDetector.NOT_A_CODE;
+    public static final int NOT_A_COORDINATE = -1;
 
     /**
      * The list of unicode values for each keystroke (including surrounding keys)
      */
     private final ArrayList<int[]> mCodes;
-    
+
+    private int mTypedLength;
+    private final int[] mXCoordinates;
+    private final int[] mYCoordinates;
+
     /**
      * The word chosen from the candidate list, until it is committed.
      */
     private String mPreferredWord;
-    
+
     private final StringBuilder mTypedWord;
 
     private int mCapsCount;
@@ -48,17 +54,24 @@
     private boolean mIsFirstCharCapitalized;
 
     public WordComposer() {
-        mCodes = new ArrayList<int[]>(12);
-        mTypedWord = new StringBuilder(20);
+        final int N = BinaryDictionary.MAX_WORD_LENGTH;
+        mCodes = new ArrayList<int[]>(N);
+        mTypedWord = new StringBuilder(N);
+        mTypedLength = 0;
+        mXCoordinates = new int[N];
+        mYCoordinates = new int[N];
     }
 
-    WordComposer(WordComposer copy) {
-        mCodes = new ArrayList<int[]>(copy.mCodes);
-        mPreferredWord = copy.mPreferredWord;
-        mTypedWord = new StringBuilder(copy.mTypedWord);
-        mCapsCount = copy.mCapsCount;
-        mAutoCapitalized = copy.mAutoCapitalized;
-        mIsFirstCharCapitalized = copy.mIsFirstCharCapitalized;
+    WordComposer(WordComposer source) {
+        mCodes = new ArrayList<int[]>(source.mCodes);
+        mPreferredWord = source.mPreferredWord;
+        mTypedWord = new StringBuilder(source.mTypedWord);
+        mCapsCount = source.mCapsCount;
+        mAutoCapitalized = source.mAutoCapitalized;
+        mIsFirstCharCapitalized = source.mIsFirstCharCapitalized;
+        mTypedLength = source.mTypedLength;
+        mXCoordinates = source.mXCoordinates;
+        mYCoordinates = source.mYCoordinates;
     }
 
     /**
@@ -66,6 +79,7 @@
      */
     public void reset() {
         mCodes.clear();
+        mTypedLength = 0;
         mIsFirstCharCapitalized = false;
         mPreferredWord = null;
         mTypedWord.setLength(0);
@@ -89,15 +103,28 @@
         return mCodes.get(index);
     }
 
+    public int[] getXCoordinates() {
+        return mXCoordinates;
+    }
+
+    public int[] getYCoordinates() {
+        return mYCoordinates;
+    }
+
     /**
      * Add a new keystroke, with codes[0] containing the pressed key's unicode and the rest of
      * the array containing unicode for adjacent keys, sorted by reducing probability/proximity.
      * @param codes the array of unicode values
      */
-    public void add(int primaryCode, int[] codes) {
+    public void add(int primaryCode, int[] codes, int x, int y) {
         mTypedWord.append((char) primaryCode);
         correctPrimaryJuxtapos(primaryCode, codes);
         mCodes.add(codes);
+        if (mTypedLength < BinaryDictionary.MAX_WORD_LENGTH) {
+            mXCoordinates[mTypedLength] = x;
+            mYCoordinates[mTypedLength] = y;
+        }
+        ++mTypedLength;
         if (Character.isUpperCase((char) primaryCode)) mCapsCount++;
     }
 
@@ -128,6 +155,9 @@
             mTypedWord.deleteCharAt(lastPos);
             if (Character.isUpperCase(last)) mCapsCount--;
         }
+        if (mTypedLength > 0) {
+            --mTypedLength;
+        }
     }
 
     /**
diff --git a/native/Android.mk b/native/Android.mk
index a8fe06d..c8342e3 100644
--- a/native/Android.mk
+++ b/native/Android.mk
@@ -4,10 +4,13 @@
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
 
 LOCAL_SRC_FILES := \
+    jni/com_android_inputmethod_keyboard_ProximityInfo.cpp \
     jni/com_android_inputmethod_latin_BinaryDictionary.cpp \
+    jni/onload.cpp \
     src/bigram_dictionary.cpp \
     src/char_utils.cpp \
     src/dictionary.cpp \
+    src/proximity_info.cpp \
     src/unigram_dictionary.cpp
 
 #FLAG_DBG := true
diff --git a/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp b/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp
new file mode 100644
index 0000000..3db89ed
--- /dev/null
+++ b/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp
@@ -0,0 +1,90 @@
+/*
+**
+** Copyright 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.
+*/
+
+#define LOG_TAG "LatinIME: jni: ProximityInfo"
+
+#include "com_android_inputmethod_keyboard_ProximityInfo.h"
+#include "jni.h"
+#include "proximity_info.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+
+// ----------------------------------------------------------------------------
+
+namespace latinime {
+
+//
+// helper function to throw an exception
+//
+static void throwException(JNIEnv *env, const char* ex, const char* fmt, int data) {
+    if (jclass cls = env->FindClass(ex)) {
+        char msg[1000];
+        snprintf(msg, sizeof(msg), fmt, data);
+        env->ThrowNew(cls, msg);
+        env->DeleteLocalRef(cls);
+    }
+}
+
+static jint latinime_Keyboard_setProximityInfo(JNIEnv *env, jobject object,
+        jint maxProximityCharsSize, jint displayWidth, jint displayHeight, jint gridWidth,
+        jint gridHeight, jintArray proximityCharsArray) {
+    jint* proximityChars = env->GetIntArrayElements(proximityCharsArray, NULL);
+    ProximityInfo *proximityInfo = new ProximityInfo(maxProximityCharsSize, displayWidth,
+            displayHeight, gridWidth, gridHeight, (const uint32_t *)proximityChars);
+    env->ReleaseIntArrayElements(proximityCharsArray, proximityChars, 0);
+    return (jint)proximityInfo;
+}
+
+static void latinime_Keyboard_release(JNIEnv *env, jobject object, jint proximityInfo) {
+    ProximityInfo *pi = (ProximityInfo*)proximityInfo;
+    if (!pi) return;
+    delete pi;
+}
+
+// ----------------------------------------------------------------------------
+
+static JNINativeMethod sKeyboardMethods[] = {
+    {"setProximityInfoNative", "(IIIII[I)I", (void*)latinime_Keyboard_setProximityInfo},
+    {"releaseProximityInfoNative", "(I)V", (void*)latinime_Keyboard_release}
+};
+
+static int registerNativeMethods(JNIEnv* env, const char* className, JNINativeMethod* gMethods,
+        int numMethods) {
+    jclass clazz;
+
+    clazz = env->FindClass(className);
+    if (clazz == NULL) {
+        LOGE("Native registration unable to find class '%s'", className);
+        return JNI_FALSE;
+    }
+    if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
+        LOGE("RegisterNatives failed for '%s'", className);
+        return JNI_FALSE;
+    }
+
+    return JNI_TRUE;
+}
+
+int register_ProximityInfo(JNIEnv *env) {
+    const char* const kClassPathName = "com/android/inputmethod/keyboard/ProximityInfo";
+    return registerNativeMethods(env, kClassPathName, sKeyboardMethods,
+            sizeof(sKeyboardMethods) / sizeof(sKeyboardMethods[0]));
+}
+
+}; // namespace latinime
diff --git a/native/jni/com_android_inputmethod_keyboard_ProximityInfo.h b/native/jni/com_android_inputmethod_keyboard_ProximityInfo.h
new file mode 100644
index 0000000..bdeeb8f
--- /dev/null
+++ b/native/jni/com_android_inputmethod_keyboard_ProximityInfo.h
@@ -0,0 +1,27 @@
+/*
+**
+** Copyright 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 _COM_ANDROID_INPUTMETHOD_KEYBOARD_PROXIMITYINFO_H
+#define _COM_ANDROID_INPUTMETHOD_KEYBOARD_PROXIMITYINFO_H
+
+#include "jni.h"
+
+namespace latinime {
+int register_ProximityInfo(JNIEnv *env);
+}
+
+#endif // _COM_ANDROID_INPUTMETHOD_KEYBOARD_PROXIMITYINFO_H
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 4660103..b10dd6d 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -15,10 +15,12 @@
 ** limitations under the License.
 */
 
-#define LOG_TAG "LatinIME: jni"
+#define LOG_TAG "LatinIME: jni: BinaryDictionary"
 
+#include "com_android_inputmethod_latin_BinaryDictionary.h"
 #include "dictionary.h"
 #include "jni.h"
+#include "proximity_info.h"
 
 #include <assert.h>
 #include <errno.h>
@@ -35,7 +37,7 @@
 
 // ----------------------------------------------------------------------------
 
-using namespace latinime;
+namespace latinime {
 
 //
 // helper function to throw an exception
@@ -43,7 +45,7 @@
 static void throwException(JNIEnv *env, const char* ex, const char* fmt, int data) {
     if (jclass cls = env->FindClass(ex)) {
         char msg[1000];
-        sprintf(msg, fmt, data);
+        snprintf(msg, sizeof(msg), fmt, data);
         env->ThrowNew(cls, msg);
         env->DeleteLocalRef(cls);
     }
@@ -123,19 +125,27 @@
 }
 
 static int latinime_BinaryDictionary_getSuggestions(JNIEnv *env, jobject object, jint dict,
+        jint proximityInfo, jintArray xCoordinatesArray, jintArray yCoordinatesArray,
         jintArray inputArray, jint arraySize, jcharArray outputArray, jintArray frequencyArray) {
     Dictionary *dictionary = (Dictionary*)dict;
     if (!dictionary) return 0;
+    ProximityInfo *pInfo = (ProximityInfo*)proximityInfo;
+    if (!pInfo) return 0;
+
+    int *xCoordinates = env->GetIntArrayElements(xCoordinatesArray, NULL);
+    int *yCoordinates = env->GetIntArrayElements(yCoordinatesArray, NULL);
 
     int *frequencies = env->GetIntArrayElements(frequencyArray, NULL);
     int *inputCodes = env->GetIntArrayElements(inputArray, NULL);
     jchar *outputChars = env->GetCharArrayElements(outputArray, NULL);
 
-    int count = dictionary->getSuggestions(inputCodes, arraySize, (unsigned short*) outputChars,
-            frequencies);
+    int count = dictionary->getSuggestions(pInfo, xCoordinates, yCoordinates, inputCodes,
+            arraySize, (unsigned short*) outputChars, frequencies);
 
     env->ReleaseIntArrayElements(frequencyArray, frequencies, 0);
     env->ReleaseIntArrayElements(inputArray, inputCodes, JNI_ABORT);
+    env->ReleaseIntArrayElements(xCoordinatesArray, xCoordinates, 0);
+    env->ReleaseIntArrayElements(yCoordinatesArray, yCoordinates, 0);
     env->ReleaseCharArrayElements(outputArray, outputChars, 0);
 
     return count;
@@ -200,10 +210,10 @@
 
 // ----------------------------------------------------------------------------
 
-static JNINativeMethod gMethods[] = {
+static JNINativeMethod sMethods[] = {
     {"openNative", "(Ljava/lang/String;JJIIIII)I", (void*)latinime_BinaryDictionary_open},
     {"closeNative", "(I)V", (void*)latinime_BinaryDictionary_close},
-    {"getSuggestionsNative", "(I[II[C[I)I", (void*)latinime_BinaryDictionary_getSuggestions},
+    {"getSuggestionsNative", "(II[I[I[II[C[I)I", (void*)latinime_BinaryDictionary_getSuggestions},
     {"isValidWordNative", "(I[CI)Z", (void*)latinime_BinaryDictionary_isValidWord},
     {"getBigramsNative", "(I[CI[II[C[IIII)I", (void*)latinime_BinaryDictionary_getBigrams}
 };
@@ -225,33 +235,10 @@
     return JNI_TRUE;
 }
 
-static int registerNatives(JNIEnv *env) {
+int register_BinaryDictionary(JNIEnv *env) {
     const char* const kClassPathName = "com/android/inputmethod/latin/BinaryDictionary";
-    return registerNativeMethods(env, kClassPathName, gMethods,
-            sizeof(gMethods) / sizeof(gMethods[0]));
+    return registerNativeMethods(env, kClassPathName, sMethods,
+            sizeof(sMethods) / sizeof(sMethods[0]));
 }
 
-/*
- * Returns the JNI version on success, -1 on failure.
- */
-jint JNI_OnLoad(JavaVM* vm, void* reserved) {
-    JNIEnv* env = NULL;
-    jint result = -1;
-
-    if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
-        LOGE("ERROR: GetEnv failed");
-        goto bail;
-    }
-    assert(env != NULL);
-
-    if (!registerNatives(env)) {
-        LOGE("ERROR: BinaryDictionary native registration failed");
-        goto bail;
-    }
-
-    /* success -- return valid version number */
-    result = JNI_VERSION_1_4;
-
-bail:
-    return result;
-}
+}; // namespace latinime
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.h b/native/jni/com_android_inputmethod_latin_BinaryDictionary.h
new file mode 100644
index 0000000..f7cd81f
--- /dev/null
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.h
@@ -0,0 +1,27 @@
+/*
+**
+** Copyright 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 _COM_ANDROID_INPUTMETHOD_LATIN_BINARYDICTIONARY_H
+#define _COM_ANDROID_INPUTMETHOD_LATIN_BINARYDICTIONARY_H
+
+#include "jni.h"
+
+namespace latinime {
+int register_BinaryDictionary(JNIEnv *env);
+}
+
+#endif // _COM_ANDROID_INPUTMETHOD_LATIN_BINARYDICTIONARY_H
diff --git a/native/jni/onload.cpp b/native/jni/onload.cpp
new file mode 100644
index 0000000..f02c9a0
--- /dev/null
+++ b/native/jni/onload.cpp
@@ -0,0 +1,62 @@
+/*
+**
+** Copyright 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.
+*/
+
+#define LOG_TAG "LatinIME: jni"
+
+#include "com_android_inputmethod_keyboard_ProximityInfo.h"
+#include "com_android_inputmethod_latin_BinaryDictionary.h"
+#include "jni.h"
+#include "proximity_info.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+
+// ----------------------------------------------------------------------------
+
+using namespace latinime;
+
+
+/*
+ * Returns the JNI version on success, -1 on failure.
+ */
+jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+    JNIEnv* env = NULL;
+    jint result = -1;
+
+    if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
+        LOGE("ERROR: GetEnv failed");
+        goto bail;
+    }
+    assert(env != NULL);
+
+    if (!register_BinaryDictionary(env)) {
+        LOGE("ERROR: BinaryDictionary native registration failed");
+        goto bail;
+    }
+
+    if (!register_ProximityInfo(env)) {
+        LOGE("ERROR: ProximityInfo native registration failed");
+        goto bail;
+    }
+
+    /* success -- return valid version number */
+    result = JNI_VERSION_1_4;
+
+bail:
+    return result;
+}
diff --git a/native/src/defines.h b/native/src/defines.h
index 918028a..ddd65c9 100644
--- a/native/src/defines.h
+++ b/native/src/defines.h
@@ -28,6 +28,7 @@
 #define DEBUG_SHOW_FOUND_WORD DEBUG_DICT_FULL
 #define DEBUG_NODE DEBUG_DICT_FULL
 #define DEBUG_TRACE DEBUG_DICT_FULL
+#define DEBUG_PROXIMITY_INFO true
 
 // Profiler
 #include <time.h>
@@ -83,6 +84,7 @@
 #define DEBUG_SHOW_FOUND_WORD false
 #define DEBUG_NODE false
 #define DEBUG_TRACE false
+#define DEBUG_PROXIMITY_INFO false
 
 #define PROF_BUF_SIZE 0
 #define PROF_RESET
diff --git a/native/src/dictionary.cpp b/native/src/dictionary.cpp
index fe33757..d69cb2a 100644
--- a/native/src/dictionary.cpp
+++ b/native/src/dictionary.cpp
@@ -23,6 +23,7 @@
 
 namespace latinime {
 
+// TODO: Change the type of all keyCodes to uint32_t
 Dictionary::Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust,
         int typedLetterMultiplier, int fullWordMultiplier,
         int maxWordLength, int maxWords, int maxAlternatives)
@@ -53,8 +54,7 @@
 }
 
 // TODO: use uint16_t instead of unsigned short
-bool Dictionary::isValidWord(unsigned short *word, int length)
-{
+bool Dictionary::isValidWord(unsigned short *word, int length) {
     if (IS_LATEST_DICT_VERSION) {
         return (isValidWordRec(DICTIONARY_HEADER_SIZE, word, 0, length) != NOT_VALID_WORD);
     } else {
diff --git a/native/src/dictionary.h b/native/src/dictionary.h
index 941bd19..fbbb831 100644
--- a/native/src/dictionary.h
+++ b/native/src/dictionary.h
@@ -19,6 +19,7 @@
 
 #include "bigram_dictionary.h"
 #include "defines.h"
+#include "proximity_info.h"
 #include "unigram_dictionary.h"
 
 namespace latinime {
@@ -27,8 +28,10 @@
 public:
     Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust, int typedLetterMultipler,
             int fullWordMultiplier, int maxWordLength, int maxWords, int maxAlternatives);
-    int getSuggestions(int *codes, int codesSize, unsigned short *outWords, int *frequencies) {
-        return mUnigramDictionary->getSuggestions(codes, codesSize, outWords, frequencies);
+    int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
+            int *codes, int codesSize, unsigned short *outWords, int *frequencies) {
+        return mUnigramDictionary->getSuggestions(proximityInfo, xcoordinates, ycoordinates, codes,
+                codesSize, outWords, frequencies);
     }
 
     // TODO: Call mBigramDictionary instead of mUnigramDictionary
@@ -38,6 +41,7 @@
         return mBigramDictionary->getBigrams(word, length, codes, codesSize, outWords, frequencies,
                 maxWordLength, maxBigrams, maxAlternatives);
     }
+
     bool isValidWord(unsigned short *word, int length);
     int isValidWordRec(int pos, unsigned short *word, int offset, int length);
     void *getDict() { return (void *)mDict; }
diff --git a/native/src/proximity_info.cpp b/native/src/proximity_info.cpp
new file mode 100644
index 0000000..d0cba3e
--- /dev/null
+++ b/native/src/proximity_info.cpp
@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "proximity_info.h"
+
+namespace latinime {
+ProximityInfo::ProximityInfo(int maxProximityCharsSize, int displayWidth, int displayHeight,
+        int gridWidth, int gridHeight, uint32_t const *proximityCharsArray)
+        : MAX_PROXIMITY_CHARS_SIZE(maxProximityCharsSize), DISPLAY_WIDTH(displayWidth),
+          DISPLAY_HEIGHT(displayHeight), GRID_WIDTH(gridWidth), GRID_HEIGHT(gridHeight) {
+    mProximityCharsArray = new uint32_t[GRID_WIDTH * GRID_HEIGHT * MAX_PROXIMITY_CHARS_SIZE];
+    memcpy(mProximityCharsArray, proximityCharsArray, sizeof(mProximityCharsArray));
+}
+
+ProximityInfo::~ProximityInfo() {
+    delete[] mProximityCharsArray;
+}
+}
diff --git a/native/src/proximity_info.h b/native/src/proximity_info.h
new file mode 100644
index 0000000..54e9950
--- /dev/null
+++ b/native/src/proximity_info.h
@@ -0,0 +1,40 @@
+/*
+ * 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(int maxProximityCharsSize, int displayWidth, int displayHeight, int gridWidth,
+            int gridHeight, uint32_t const *proximityCharsArray);
+    ~ProximityInfo();
+private:
+    const int MAX_PROXIMITY_CHARS_SIZE;
+    const int DISPLAY_WIDTH;
+    const int DISPLAY_HEIGHT;
+    const int GRID_WIDTH;
+    const int GRID_HEIGHT;
+    uint32_t *mProximityCharsArray;
+};
+}; // namespace latinime
+#endif // LATINIME_PROXIMITY_INFO_H
diff --git a/native/src/unigram_dictionary.cpp b/native/src/unigram_dictionary.cpp
index 0ea6506..72b0f36 100644
--- a/native/src/unigram_dictionary.cpp
+++ b/native/src/unigram_dictionary.cpp
@@ -41,13 +41,19 @@
 
 UnigramDictionary::~UnigramDictionary() {}
 
-int UnigramDictionary::getSuggestions(int *codes, int codesSize, unsigned short *outWords,
-        int *frequencies) {
+int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates,
+        int *ycoordinates, int *codes, int codesSize, unsigned short *outWords, int *frequencies) {
     PROF_OPEN;
     PROF_START(0);
     initSuggestions(codes, codesSize, outWords, frequencies);
     if (DEBUG_DICT) assert(codesSize == mInputLength);
 
+    if (DEBUG_PROXIMITY_INFO) {
+        for (int i = 0; i < codesSize; ++i) {
+            LOGI("Input[%d] x = %d, y = %d", i, xcoordinates[i], ycoordinates[i]);
+        }
+    }
+
     const int MAX_DEPTH = min(mInputLength * MAX_DEPTH_MULTIPLIER, MAX_WORD_LENGTH);
     PROF_END(0);
 
@@ -406,7 +412,7 @@
 
 inline bool UnigramDictionary::needsToSkipCurrentNode(const unsigned short c,
         const int inputIndex, const int skipPos, const int depth) {
-    const unsigned short userTypedChar = (mInputCodes + (inputIndex * MAX_PROXIMITY_CHARS))[0];
+    const unsigned short userTypedChar = getInputCharsAt(inputIndex)[0];
     // Skip the ' or other letter and continue deeper
     return (c == QUOTE && userTypedChar != QUOTE) || skipPos == depth;
 }
@@ -517,7 +523,7 @@
         *newDiffs = diffs;
         *newInputIndex = inputIndex;
     } else {
-        int *currentChars = mInputCodes + (inputIndex * MAX_PROXIMITY_CHARS);
+        int *currentChars = getInputCharsAt(inputIndex);
 
         if (transposedPos >= 0) {
             if (inputIndex == transposedPos) currentChars += MAX_PROXIMITY_CHARS;
@@ -620,7 +626,7 @@
         const int startInputIndex, const int depth, unsigned short *word, int *newChildPosition,
         int *newCount, bool *newTerminal, int *newFreq, int *siblingPos) {
     const int inputIndex = startInputIndex + depth;
-    const int *currentChars = mInputCodes + (inputIndex * MAX_PROXIMITY_CHARS);
+    const int *currentChars = getInputCharsAt(inputIndex);
     unsigned short c;
     *siblingPos = Dictionary::setDictionaryValues(DICT, IS_LATEST_DICT_VERSION, firstChildPos, &c,
             newChildPosition, newTerminal, newFreq);
diff --git a/native/src/unigram_dictionary.h b/native/src/unigram_dictionary.h
index db40646..e84875b 100644
--- a/native/src/unigram_dictionary.h
+++ b/native/src/unigram_dictionary.h
@@ -18,6 +18,7 @@
 #define LATINIME_UNIGRAM_DICTIONARY_H
 
 #include "defines.h"
+#include "proximity_info.h"
 
 namespace latinime {
 
@@ -32,7 +33,8 @@
 public:
     UnigramDictionary(const unsigned char *dict, int typedLetterMultipler, int fullWordMultiplier,
             int maxWordLength, int maxWords, int maxProximityChars, const bool isLatestDictVersion);
-    int getSuggestions(int *codes, int codesSize, unsigned short *outWords, int *frequencies);
+    int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
+            int *codes, int codesSize, unsigned short *outWords, int *frequencies);
     ~UnigramDictionary();
 
 private:
@@ -84,7 +86,9 @@
             const int startInputIndex, const int depth, unsigned short *word,
             int *newChildPosition, int *newCount, bool *newTerminal, int *newFreq, int *siblingPos);
     bool existsAdjacentProximityChars(const int inputIndex, const int inputLength);
-    int* getInputCharsAt(const int index) {return mInputCodes + (index * MAX_PROXIMITY_CHARS);}
+    inline int* getInputCharsAt(const int index) {
+        return mInputCodes + (index * MAX_PROXIMITY_CHARS);
+    }
     const unsigned char *DICT;
     const int MAX_WORD_LENGTH;
     const int MAX_WORDS;
diff --git a/tests/src/com/android/inputmethod/latin/SuggestHelper.java b/tests/src/com/android/inputmethod/latin/SuggestHelper.java
index 88f89d9..a845acb 100644
--- a/tests/src/com/android/inputmethod/latin/SuggestHelper.java
+++ b/tests/src/com/android/inputmethod/latin/SuggestHelper.java
@@ -64,7 +64,7 @@
         return mSuggest.hasMainDictionary();
     }
 
-    private int[] getProximityCodes(char c) {
+    private void addKeyInfo(WordComposer word, char c) {
         final List<Key> keys = mKeyboard.getKeys();
         for (final Key key : keys) {
             if (key.mCode == c) {
@@ -72,17 +72,17 @@
                 final int y = key.mY + key.mHeight / 2;
                 final int[] codes = mKeyDetector.newCodeArray();
                 mKeyDetector.getKeyIndexAndNearbyCodes(x, y, codes);
-                return codes;
+                word.add(c, codes, x, y);
             }
         }
-        return new int[] { c };
+        word.add(c, new int[] { c }, WordComposer.NOT_A_COORDINATE, WordComposer.NOT_A_COORDINATE);
     }
 
     protected WordComposer createWordComposer(CharSequence s) {
         WordComposer word = new WordComposer();
         for (int i = 0; i < s.length(); i++) {
             final char c = s.charAt(i);
-            word.add(c, getProximityCodes(c));
+            addKeyInfo(word, c);
         }
         return word;
     }