Use PrevWordsInfo for get/add/remove n-gram(bigram) entry.

Bug: 14119293
Bug: 14425059
Bug: 15102610
Change-Id: Ib482390f8d15b37d44a1a54e8c243a9eaec3f815

1 files changed, 11 insertions, 9 deletions

diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
index 14c8bb6c3..301b832b6 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
@@ -370,22 +370,23 @@ public class DictionaryFacilitatorForSuggest {
     }
 
     public void addToUserHistory(final String suggestion, final boolean wasAutoCapitalized,
-            final String previousWord, final int timeStampInSeconds,
+            final PrevWordsInfo prevWordsInfo, final int timeStampInSeconds,
             final boolean blockPotentiallyOffensive) {
         final Dictionaries dictionaries = mDictionaries;
         final String[] words = suggestion.split(Constants.WORD_SEPARATOR);
         for (int i = 0; i < words.length; i++) {
             final String currentWord = words[i];
-            final String prevWord = (i == 0) ? previousWord : words[i - 1];
+            final PrevWordsInfo prevWordsInfoForCurrentWord =
+                    (i == 0) ? prevWordsInfo : new PrevWordsInfo(words[i - 1]);
             final boolean wasCurrentWordAutoCapitalized = (i == 0) ? wasAutoCapitalized : false;
-            addWordToUserHistory(dictionaries, prevWord, currentWord,
+            addWordToUserHistory(dictionaries, prevWordsInfoForCurrentWord, currentWord,
                     wasCurrentWordAutoCapitalized, timeStampInSeconds, blockPotentiallyOffensive);
         }
     }
 
-    private void addWordToUserHistory(final Dictionaries dictionaries, final String prevWord,
-            final String word, final boolean wasAutoCapitalized, final int timeStampInSeconds,
-            final boolean blockPotentiallyOffensive) {
+    private void addWordToUserHistory(final Dictionaries dictionaries,
+            final PrevWordsInfo prevWordsInfo, final String word, final boolean wasAutoCapitalized,
+            final int timeStampInSeconds, final boolean blockPotentiallyOffensive) {
         final ExpandableBinaryDictionary userHistoryDictionary =
                 dictionaries.getSubDict(Dictionary.TYPE_USER_HISTORY);
         if (userHistoryDictionary == null) {
@@ -430,15 +431,16 @@ public class DictionaryFacilitatorForSuggest {
         // We demote unrecognized words (frequency < 0, below) by specifying them as "invalid".
         // We don't add words with 0-frequency (assuming they would be profanity etc.).
         final boolean isValid = maxFreq > 0;
-        UserHistoryDictionary.addToDictionary(userHistoryDictionary, prevWord, secondWord,
+        UserHistoryDictionary.addToDictionary(userHistoryDictionary, prevWordsInfo, secondWord,
                 isValid, timeStampInSeconds);
     }
 
-    public void cancelAddingUserHistory(final String previousWord, final String committedWord) {
+    public void cancelAddingUserHistory(final PrevWordsInfo prevWordsInfo,
+            final String committedWord) {
         final ExpandableBinaryDictionary userHistoryDictionary =
                 mDictionaries.getSubDict(Dictionary.TYPE_USER_HISTORY);
         if (userHistoryDictionary != null) {
-            userHistoryDictionary.removeBigramDynamically(previousWord, committedWord);
+            userHistoryDictionary.removeNgramDynamically(prevWordsInfo, committedWord);
         }
     }