1 files changed, 49 insertions, 2 deletions

diff --git a/native/src/proximity_info.cpp b/native/src/proximity_info.cpp
index 361bdacbf..94cccc382 100644
--- a/native/src/proximity_info.cpp
+++ b/native/src/proximity_info.cpp
@@ -14,11 +14,13 @@
  * limitations under the License.
  */
 
+#include <assert.h>
 #include <stdio.h>
 #include <string.h>
 
 #define LOG_TAG "LatinIME: proximity_info.cpp"
 
+#include "defines_touch_position_correction.h"
 #include "dictionary.h"
 #include "proximity_info.h"
 
@@ -26,17 +28,59 @@ namespace latinime {
 
 ProximityInfo::ProximityInfo(const int maxProximityCharsSize, const int keyboardWidth,
         const int keyboardHeight, const int gridWidth, const int gridHeight,
-        const uint32_t *proximityCharsArray)
+        const uint32_t *proximityCharsArray, const int keyCount, const int32_t *keyXCoordinates,
+        const int32_t *keyYCoordinates, const int32_t *keyWidths, const int32_t *keyHeights,
+        const int32_t *keyCharCodes)
         : MAX_PROXIMITY_CHARS_SIZE(maxProximityCharsSize), KEYBOARD_WIDTH(keyboardWidth),
           KEYBOARD_HEIGHT(keyboardHeight), GRID_WIDTH(gridWidth), GRID_HEIGHT(gridHeight),
           CELL_WIDTH((keyboardWidth + gridWidth - 1) / gridWidth),
-          CELL_HEIGHT((keyboardHeight + gridHeight - 1) / gridHeight) {
+          CELL_HEIGHT((keyboardHeight + gridHeight - 1) / gridHeight),
+          KEY_COUNT(min(keyCount, MAX_KEY_COUNT_IN_A_KEYBOARD)) {
     const int len = GRID_WIDTH * GRID_HEIGHT * MAX_PROXIMITY_CHARS_SIZE;
     mProximityCharsArray = new uint32_t[len];
     if (DEBUG_PROXIMITY_INFO) {
         LOGI("Create proximity info array %d", len);
     }
     memcpy(mProximityCharsArray, proximityCharsArray, len * sizeof(mProximityCharsArray[0]));
+
+    if (KEY_COUNT > 0) {
+        if (DEBUG_PROXIMITY_INFO) {
+            LOGI("Create key coordinate array %d", keyCount);
+        }
+        memcpy(mKeyXCoordinates, keyXCoordinates, KEY_COUNT * sizeof(mKeyXCoordinates[0]));
+        memcpy(mKeyYCoordinates, keyYCoordinates, KEY_COUNT * sizeof(mKeyYCoordinates[0]));
+        memcpy(mKeyWidths, keyWidths, KEY_COUNT * sizeof(mKeyWidths[0]));
+        memcpy(mKeyHeights, keyHeights, KEY_COUNT * sizeof(mKeyHeights[0]));
+        memcpy(mKeyCharCodes, keyCharCodes, KEY_COUNT * sizeof(mKeyCharCodes[0]));
+    }
+
+    initializeCodeToGroup();
+    initializeCodeToKeyIndex();
+}
+
+// Build the reversed look up table from the char code to the index in its group.
+// see TOUCH_POSITION_CORRECTION_GROUPS
+void ProximityInfo::initializeCodeToGroup() {
+    memset(mCodeToGroup, -1, (MAX_GROUPED_CHAR_CODE + 1) * sizeof(mCodeToGroup[0]));
+    for (int i = 0; i < CORRECTION_GROUP_COUNT; ++i) {
+        const char *group = TOUCH_POSITION_CORRECTION_GROUPS[i];
+        for (int j = 0; group[j]; ++j) {
+            const int code = group[j];
+            if (0 <= code && code <= MAX_GROUPED_CHAR_CODE)
+                mCodeToGroup[code] = i;
+        }
+    }
+}
+
+// Build the reversed look up table from the char code to the index in mKeyXCoordinates,
+// mKeyYCoordinates, mKeyWidths, mKeyHeights, mKeyCharCodes.
+void ProximityInfo::initializeCodeToKeyIndex() {
+    memset(mCodeToKeyIndex, -1, (MAX_GROUPED_CHAR_CODE + 1) * sizeof(mCodeToKeyIndex[0]));
+    for (int i = 0; i < KEY_COUNT; ++i) {
+        const int code = mKeyCharCodes[i];
+        if (0 <= code && code <= MAX_GROUPED_CHAR_CODE)
+            mCodeToKeyIndex[code] = i;
+    }
 }
 
 ProximityInfo::~ProximityInfo() {
@@ -162,4 +206,7 @@ bool ProximityInfo::sameAsTyped(const unsigned short *word, int length) const {
     return true;
 }
 
+const int ProximityInfo::MAX_KEY_COUNT_IN_A_KEYBOARD;
+const int ProximityInfo::MAX_GROUPED_CHAR_CODE;
+
 } // namespace latinime