diff options
Diffstat (limited to 'java/src')
| -rw-r--r-- | java/src/com/android/inputmethod/latin/personalization/DynamicPersonalizationDictionaryWriter.java | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/java/src/com/android/inputmethod/latin/personalization/DynamicPersonalizationDictionaryWriter.java b/java/src/com/android/inputmethod/latin/personalization/DynamicPersonalizationDictionaryWriter.java index e43e74d87..0af028a9e 100644 --- a/java/src/com/android/inputmethod/latin/personalization/DynamicPersonalizationDictionaryWriter.java +++ b/java/src/com/android/inputmethod/latin/personalization/DynamicPersonalizationDictionaryWriter.java @@ -19,6 +19,7 @@ package com.android.inputmethod.latin.personalization; import android.content.Context; import com.android.inputmethod.annotations.UsedForTesting; +import com.android.inputmethod.compat.ActivityManagerCompatUtils; import com.android.inputmethod.keyboard.ProximityInfo; import com.android.inputmethod.latin.AbstractDictionaryWriter; import com.android.inputmethod.latin.ExpandableDictionary; @@ -41,7 +42,8 @@ import java.util.ArrayList; public class DynamicPersonalizationDictionaryWriter extends AbstractDictionaryWriter { private static final String TAG = DynamicPersonalizationDictionaryWriter.class.getSimpleName(); /** Maximum number of pairs. Pruning will start when databases goes above this number. */ - public static final int MAX_HISTORY_BIGRAMS = 10000; + public static final int DEFAULT_MAX_HISTORY_BIGRAMS = 10000; + public static final int LOW_MEMORY_MAX_HISTORY_BIGRAMS = 2000; /** Any pair being typed or picked */ private static final int FREQUENCY_FOR_TYPED = 2; @@ -53,10 +55,14 @@ public class DynamicPersonalizationDictionaryWriter extends AbstractDictionaryWr private final UserHistoryDictionaryBigramList mBigramList = new UserHistoryDictionaryBigramList(); private final ExpandableDictionary mExpandableDictionary; + private final int mMaxHistoryBigrams; public DynamicPersonalizationDictionaryWriter(final Context context, final String dictType) { super(context, dictType); mExpandableDictionary = new ExpandableDictionary(dictType); + final boolean isLowRamDevice = ActivityManagerCompatUtils.isLowRamDevice(context); + mMaxHistoryBigrams = isLowRamDevice ? + LOW_MEMORY_MAX_HISTORY_BIGRAMS : DEFAULT_MAX_HISTORY_BIGRAMS; } @Override @@ -72,6 +78,10 @@ public class DynamicPersonalizationDictionaryWriter extends AbstractDictionaryWr @Override public void addUnigramWord(final String word, final String shortcutTarget, final int frequency, final boolean isNotAWord) { + if (mBigramList.size() > mMaxHistoryBigrams * 2) { + // Too many entries: just stop adding new vocabrary and wait next refresh. + return; + } mExpandableDictionary.addWord(word, shortcutTarget, frequency); mBigramList.addBigram(null, word, (byte)frequency); } @@ -79,6 +89,10 @@ public class DynamicPersonalizationDictionaryWriter extends AbstractDictionaryWr @Override public void addBigramWords(final String word0, final String word1, final int frequency, final boolean isValid, final long lastModifiedTime) { + if (mBigramList.size() > mMaxHistoryBigrams * 2) { + // Too many entries: just stop adding new vocabrary and wait next refresh. + return; + } if (lastModifiedTime > 0) { mExpandableDictionary.setBigramAndGetFrequency(word0, word1, new ForgettingCurveParams(frequency, System.currentTimeMillis(), @@ -102,19 +116,22 @@ public class DynamicPersonalizationDictionaryWriter extends AbstractDictionaryWr protected void writeDictionary(final DictEncoder dictEncoder) throws IOException, UnsupportedFormatException { UserHistoryDictIOUtils.writeDictionary(dictEncoder, - new FrequencyProvider(mBigramList, mExpandableDictionary), mBigramList, - FORMAT_OPTIONS); + new FrequencyProvider(mBigramList, mExpandableDictionary, mMaxHistoryBigrams), + mBigramList, FORMAT_OPTIONS); } private static class FrequencyProvider implements BigramDictionaryInterface { - final private UserHistoryDictionaryBigramList mBigramList; - final private ExpandableDictionary mExpandableDictionary; + private final UserHistoryDictionaryBigramList mBigramList; + private final ExpandableDictionary mExpandableDictionary; + private final int mMaxHistoryBigrams; public FrequencyProvider(final UserHistoryDictionaryBigramList bigramList, - final ExpandableDictionary expandableDictionary) { + final ExpandableDictionary expandableDictionary, final int maxHistoryBigrams) { mBigramList = bigramList; mExpandableDictionary = expandableDictionary; + mMaxHistoryBigrams = maxHistoryBigrams; } + @Override public int getFrequency(final String word0, final String word1) { final int freq; @@ -130,7 +147,7 @@ public class DynamicPersonalizationDictionaryWriter extends AbstractDictionaryWr if (prevFc > 0 && prevFc == fc) { freq = fc & 0xFF; } else if (UserHistoryForgettingCurveUtils. - needsToSave(fc, isValid, mBigramList.size() <= MAX_HISTORY_BIGRAMS)) { + needsToSave(fc, isValid, mBigramList.size() <= mMaxHistoryBigrams)) { freq = fc & 0xFF; } else { // Delete this entry |