[Rlog7] ResearchLog improve gesture tracking

- count how many times a gesture is deleted
- count num chars entered by gesture
- change name of fns to reflect capturing gesture information when setting composing text

Change-Id: I1b8ebf9cfcf304e0efd827c8b8e28a4010199728

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -1637,6 +1637,9 @@ public final class LatinIME extends InputMethodService implements KeyboardAction
             if (length > 0) {
                 if (mWordComposer.isBatchMode()) {
                     mWordComposer.reset();
+                    if (ProductionFlag.IS_EXPERIMENTAL) {
+                        ResearchLogger.latinIME_handleBackspace_batch(mWordComposer.getTypedWord());
+                    }
                 } else {
                     mWordComposer.deleteLast();
                 }

java/src/com/android/inputmethod/research/ResearchLogger.java

@@ -1208,7 +1208,15 @@ public class ResearchLogger implements SharedPreferences.OnSharedPreferenceChang
         final ResearchLogger researchLogger = getInstance();
         researchLogger.enqueueEvent(LOGSTATEMENT_LATINIME_ONENDBATCHINPUT, enteredText,
                 enteredWordPos);
-        researchLogger.mStatistics.recordGestureInput();
+        researchLogger.mStatistics.recordGestureInput(enteredText.length());
+    }
+
+    private static final LogStatement LOGSTATEMENT_LATINIME_HANDLEBACKSPACE_BATCH =
+            new LogStatement("LatinIMEHandleBackspaceBatch", true, false, "deletedText");
+    public static void latinIME_handleBackspace_batch(final CharSequence deletedText) {
+        final ResearchLogger researchLogger = getInstance();
+        researchLogger.enqueueEvent(LOGSTATEMENT_LATINIME_HANDLEBACKSPACE_BATCH, deletedText);
+        researchLogger.mStatistics.recordGestureDelete();
     }
 
     private static final LogStatement LOGSTATEMENT_STATISTICS =
@@ -1216,7 +1224,8 @@ public class ResearchLogger implements SharedPreferences.OnSharedPreferenceChang
                     "spaceCount", "deleteOpsCount", "wordCount", "isEmptyUponStarting",
                     "isEmptinessStateKnown", "averageTimeBetweenKeys", "averageTimeBeforeDelete",
                     "averageTimeDuringRepeatedDelete", "averageTimeAfterDelete",
-                    "dictionaryWordCount", "splitWordsCount", "gestureInputCount");
+                    "dictionaryWordCount", "splitWordsCount", "gestureInputCount",
+                    "gestureCharsCount", "gesturesDeletedCount");
     private static void logStatistics() {
         final ResearchLogger researchLogger = getInstance();
         final Statistics statistics = researchLogger.mStatistics;
@@ -1228,6 +1237,8 @@ public class ResearchLogger implements SharedPreferences.OnSharedPreferenceChang
                 statistics.mDuringRepeatedDeleteKeysCounter.getAverageTime(),
                 statistics.mAfterDeleteKeyCounter.getAverageTime(),
                 statistics.mDictionaryWordCount, statistics.mSplitWordsCount,
-                statistics.mGestureInputCount);
+                statistics.mGestureInputCount,
+                statistics.mGestureCharsCount,
+                statistics.mGesturesDeletedCount);
     }
 }

java/src/com/android/inputmethod/research/Statistics.java

@@ -43,6 +43,10 @@ public class Statistics {
     int mSplitWordsCount;
     // Number of gestures that were input.
     int mGestureInputCount;
+    // Number of gestures that were deleted.
+    int mGesturesDeletedCount;
+    // Total number of characters in words entered by gesture.
+    int mGestureCharsCount;
     // Whether the text field was empty upon editing
     boolean mIsEmptyUponStarting;
     boolean mIsEmptinessStateKnown;
@@ -109,6 +113,8 @@ public class Statistics {
         mBeforeDeleteKeyCounter.reset();
         mDuringRepeatedDeleteKeysCounter.reset();
         mAfterDeleteKeyCounter.reset();
+        mGestureCharsCount = 0;
+        mGesturesDeletedCount = 0;
 
         mLastTapTime = 0;
         mIsLastKeyDeleteKey = false;
@@ -161,12 +167,17 @@ public class Statistics {
         mSplitWordsCount++;
     }
 
-    public void recordGestureInput() {
+    public void recordGestureInput(final int numCharsEntered) {
         mGestureInputCount++;
+        mGestureCharsCount += numCharsEntered;
     }
 
     public void setIsEmptyUponStarting(final boolean isEmpty) {
         mIsEmptyUponStarting = isEmpty;
         mIsEmptinessStateKnown = true;
     }
+
+    public void recordGestureDelete() {
+        mGesturesDeletedCount++;
+    }
 }