Calculate isContinuationPossible for typing

Change-Id: I11edb1e5155e5048a6c95f84b36e2ef34572178c

native/jni/src/defines.h

@@ -376,6 +376,7 @@ static inline void prof_out(void) {
 #define MIN_USER_TYPED_LENGTH_FOR_EXCESSIVE_CHARACTER_SUGGESTION 3
 
 // TODO: Remove
+#define MAX_POINTER_COUNT 1
 #define MAX_POINTER_COUNT_FOR_G 2
 
 // Size, in bytes, of the bloom filter index for bigrams

native/jni/src/proximity_info_state.cpp

@@ -39,12 +39,8 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
         const ProximityInfo *proximityInfo, const int *const inputCodes, const int inputSize,
         const int *const xCoordinates, const int *const yCoordinates, const int *const times,
         const int *const pointerIds, const bool isGeometric) {
-    if (isGeometric) {
     mIsContinuationPossible = checkAndReturnIsContinuationPossible(
-                inputSize, xCoordinates, yCoordinates, times);
+            inputSize, xCoordinates, yCoordinates, times, isGeometric);
-    } else {
-        mIsContinuationPossible = false;
-    }
 
     mProximityInfo = proximityInfo;
     mHasTouchPositionCorrectionData = proximityInfo->hasTouchPositionCorrectionData();
@@ -466,7 +462,9 @@ float ProximityInfoState::calculateBeelineSpeedRate(
 }
 
 bool ProximityInfoState::checkAndReturnIsContinuationPossible(const int inputSize,
-        const int *const xCoordinates, const int *const yCoordinates, const int *const times) {
+        const int *const xCoordinates, const int *const yCoordinates, const int *const times,
+        const bool isGeometric) const {
+    if (isGeometric) {
         for (int i = 0; i < mSampledInputSize; ++i) {
             const int index = mInputIndice[i];
             if (index > inputSize || xCoordinates[index] != mSampledInputXs[i] ||
@@ -474,6 +472,18 @@ bool ProximityInfoState::checkAndReturnIsContinuationPossible(const int inputSiz
                 return false;
             }
         }
+    } else {
+        if (inputSize < mSampledInputSize) {
+            // Assuming the cache is invalid if the previous input size is larger than the new one.
+            return false;
+        }
+        for (int i = 0; i < mSampledInputSize && i < MAX_WORD_LENGTH_INTERNAL; ++i) {
+            if (xCoordinates[i] != mSampledInputXs[i]
+                    || yCoordinates[i] != mSampledInputYs[i]) {
+                return false;
+            }
+        }
+    }
     return true;
 }
 

native/jni/src/proximity_info_state.h

@@ -242,7 +242,7 @@ class ProximityInfoState {
             const NearKeysDistanceMap *const prevNearKeysDistances,
             const NearKeysDistanceMap *const prevPrevNearKeysDistances) const;
     bool checkAndReturnIsContinuationPossible(const int inputSize, const int *const xCoordinates,
-            const int *const yCoordinates, const int *const times);
+            const int *const yCoordinates, const int *const times, const bool isGeometric) const;
     void popInputData();
     void updateAlignPointProbabilities(const int start);
     bool suppressCharProbabilities(const int index1, const int index2);