Add flag to turn on new suggest implementation for typing

Bug: 8277656

Change-Id: I974f560050cc5339d110b97620df1c5b496977fe

native/jni/src/correction.cpp

@@ -954,7 +954,13 @@ inline static int editDistanceInternal(int *editDistanceTable, const int *before
 
 
 // In dictionary.cpp, getSuggestion() method,
-// suggestion scores are computed using the below formula.
+// When USE_SUGGEST_INTERFACE_FOR_TYPING is true:
+//   SUGGEST_INTERFACE_OUTPUT_SCALE was multiplied to the original suggestion scores to convert
+//   them to integers.
+//     score = (int)((original score) * SUGGEST_INTERFACE_OUTPUT_SCALE)
+//   Undo the scaling here to recover the original score.
+//     normalizedScore = ((float)score) / SUGGEST_INTERFACE_OUTPUT_SCALE
+// Otherwise: suggestion scores are computed using the below formula.
 // original score
 //  := powf(mTypedLetterMultiplier (this is defined 2),
 //         (the number of matched characters between typed word and suggested word))
@@ -991,16 +997,20 @@ inline static int editDistanceInternal(int *editDistanceTable, const int *before
         return 0.0f;
     }
 
+    // add a weight based on edit distance.
+    // distance <= max(afterLength, beforeLength) == afterLength,
+    // so, 0 <= distance / afterLength <= 1
+    const float weight = 1.0f - static_cast<float>(distance) / static_cast<float>(afterLength);
+
+    if (USE_SUGGEST_INTERFACE_FOR_TYPING) {
+        return (static_cast<float>(score) / SUGGEST_INTERFACE_OUTPUT_SCALE) * weight;
+    }
     const float maxScore = score >= S_INT_MAX ? static_cast<float>(S_INT_MAX)
             : static_cast<float>(MAX_INITIAL_SCORE)
                     * powf(static_cast<float>(TYPED_LETTER_MULTIPLIER),
                             static_cast<float>(min(beforeLength, afterLength - spaceCount)))
                     * static_cast<float>(FULL_WORD_MULTIPLIER);
 
-    // add a weight based on edit distance.
-    // distance <= max(afterLength, beforeLength) == afterLength,
-    // so, 0 <= distance / afterLength <= 1
-    const float weight = 1.0f - static_cast<float>(distance) / static_cast<float>(afterLength);
     return (static_cast<float>(score) / maxScore) * weight;
 }
 } // namespace latinime

native/jni/src/defines.h

@@ -287,6 +287,7 @@ static inline void prof_out(void) {
 
 #define CALIBRATE_SCORE_BY_TOUCH_COORDINATES true
 #define SUGGEST_MULTIPLE_WORDS true
+#define USE_SUGGEST_INTERFACE_FOR_TYPING true
 #define SUGGEST_INTERFACE_OUTPUT_SCALE 1000000.0f
 
 // The following "rate"s are used as a multiplier before dividing by 100, so they are in percent.

native/jni/src/dictionary.cpp

@@ -16,6 +16,7 @@
 
 #define LOG_TAG "LatinIME: dictionary.cpp"
 
+#include <map> // TODO: remove
 #include <stdint.h>
 
 #include "bigram_dictionary.h"
@@ -24,6 +25,7 @@
 #include "dictionary.h"
 #include "dic_traverse_wrapper.h"
 #include "gesture_suggest.h"
+#include "typing_suggest.h"
 #include "unigram_dictionary.h"
 
 namespace latinime {
@@ -34,13 +36,15 @@ Dictionary::Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust)
           mDictSize(dictSize), mMmapFd(mmapFd), mDictBufAdjust(dictBufAdjust),
           mUnigramDictionary(new UnigramDictionary(mOffsetDict, BinaryFormat::getFlags(mDict))),
           mBigramDictionary(new BigramDictionary(mOffsetDict)),
-          mGestureSuggest(new GestureSuggest()) {
+          mGestureSuggest(new GestureSuggest()),
+          mTypingSuggest(new TypingSuggest()) {
 }
 
 Dictionary::~Dictionary() {
     delete mUnigramDictionary;
     delete mBigramDictionary;
     delete mGestureSuggest;
+    delete mTypingSuggest;
 }
 
 int Dictionary::getSuggestions(ProximityInfo *proximityInfo, void *traverseSession,
@@ -59,17 +63,29 @@ int Dictionary::getSuggestions(ProximityInfo *proximityInfo, void *traverseSessi
             DUMP_RESULT(outWords, frequencies);
         }
         return result;
+    } else {
+        if (USE_SUGGEST_INTERFACE_FOR_TYPING) {
+            DicTraverseWrapper::initDicTraverseSession(
+                    traverseSession, this, prevWordCodePoints, prevWordLength);
+            result = mTypingSuggest->getSuggestions(proximityInfo, traverseSession, xcoordinates,
+                    ycoordinates, times, pointerIds, inputCodePoints, inputSize, commitPoint,
+                    outWords, frequencies, spaceIndices, outputTypes);
+            if (DEBUG_DICT) {
+                DUMP_RESULT(outWords, frequencies);
+            }
+            return result;
         } else {
             std::map<int, int> bigramMap;
             uint8_t bigramFilter[BIGRAM_FILTER_BYTE_SIZE];
             mBigramDictionary->fillBigramAddressToProbabilityMapAndFilter(prevWordCodePoints,
                     prevWordLength, &bigramMap, bigramFilter);
             result = mUnigramDictionary->getSuggestions(proximityInfo, xcoordinates, ycoordinates,
-                inputCodePoints, inputSize, &bigramMap, bigramFilter, useFullEditDistance, outWords,
+                    inputCodePoints, inputSize, &bigramMap, bigramFilter, useFullEditDistance,
-                frequencies, outputTypes);
+                    outWords, frequencies, outputTypes);
             return result;
         }
     }
+}
 
 int Dictionary::getBigrams(const int *word, int length, int *inputCodePoints, int inputSize,
         int *outWords, int *frequencies, int *outputTypes) const {

native/jni/src/dictionary.h

@@ -79,6 +79,7 @@ class Dictionary {
     const UnigramDictionary *mUnigramDictionary;
     const BigramDictionary *mBigramDictionary;
     SuggestInterface *mGestureSuggest;
+    SuggestInterface *mTypingSuggest;
 };
 } // namespace latinime
 #endif // LATINIME_DICTIONARY_H