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Cache bigram results in Android SpellChecker 

Bug: 6610579
Change-Id: I255c068f64f99ee80abda49153ed8ea009ca8ad3
main
Satoshi Kataoka 2012-06-05 15:37:48 +09:00
parent 876711930d
commit 547bc0cf04
1 changed files with 24 additions and 8 deletions
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32
java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
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@ -496,20 +496,32 @@ public class AndroidSpellCheckerService extends SpellCheckerService
}
private static class SuggestionsCache {
private static final char CHAR_DELIMITER = '\uFFFC';
private static final int MAX_CACHE_SIZE = 50;
// TODO: support bigram
private final LruCache<String, SuggestionsParams> mUnigramSuggestionsInfoCache =
new LruCache<String, SuggestionsParams>(MAX_CACHE_SIZE);
public SuggestionsParams getSuggestionsFromCache(String query) {
return mUnigramSuggestionsInfoCache.get(query);
// TODO: Support n-gram input
private static String generateKey(String query, String prevWord) {
if (TextUtils.isEmpty(query) || TextUtils.isEmpty(prevWord)) {
return query;
}
return query + CHAR_DELIMITER + prevWord;
}
public void putSuggestionsToCache(String query, String[] suggestions, int flags) {
// TODO: Support n-gram input
public SuggestionsParams getSuggestionsFromCache(String query, String prevWord) {
return mUnigramSuggestionsInfoCache.get(generateKey(query, prevWord));
}
// TODO: Support n-gram input
public void putSuggestionsToCache(
String query, String prevWord, String[] suggestions, int flags) {
if (suggestions == null || TextUtils.isEmpty(query)) {
return;
}
mUnigramSuggestionsInfoCache.put(query, new SuggestionsParams(suggestions, flags));
mUnigramSuggestionsInfoCache.put(
generateKey(query, prevWord), new SuggestionsParams(suggestions, flags));
}
}
@ -604,6 +616,7 @@ public class AndroidSpellCheckerService extends SpellCheckerService
final ArrayList<Integer> additionalLengths = new ArrayList<Integer>();
final ArrayList<SuggestionsInfo> additionalSuggestionsInfos =
new ArrayList<SuggestionsInfo>();
String currentWord = null;
for (int i = 0; i < N; ++i) {
final SuggestionsInfo si = ssi.getSuggestionsInfoAt(i);
final int flags = si.getSuggestionsAttributes();
@ -613,6 +626,8 @@ public class AndroidSpellCheckerService extends SpellCheckerService
final int offset = ssi.getOffsetAt(i);
final int length = ssi.getLengthAt(i);
final String subText = typedText.substring(offset, offset + length);
final String prevWord = currentWord;
currentWord = subText;
if (!subText.contains(SINGLE_QUOTE)) {
continue;
}
@ -626,7 +641,8 @@ public class AndroidSpellCheckerService extends SpellCheckerService
if (TextUtils.isEmpty(splitText)) {
continue;
}
if (mSuggestionsCache.getSuggestionsFromCache(splitText) == null) {
if (mSuggestionsCache.getSuggestionsFromCache(
splitText, prevWord) == null) {
continue;
}
final int newLength = splitText.length();
@ -722,7 +738,7 @@ public class AndroidSpellCheckerService extends SpellCheckerService
try {
final String inText = textInfo.getText();
final SuggestionsParams cachedSuggestionsParams =
mSuggestionsCache.getSuggestionsFromCache(inText);
mSuggestionsCache.getSuggestionsFromCache(inText, prevWord);
if (cachedSuggestionsParams != null) {
if (DBG) {
Log.d(TAG, "Cache hit: " + inText + ", " + cachedSuggestionsParams.mFlags);
@ -814,7 +830,7 @@ public class AndroidSpellCheckerService extends SpellCheckerService
.getValueOf_RESULT_ATTR_HAS_RECOMMENDED_SUGGESTIONS()
: 0);
final SuggestionsInfo retval = new SuggestionsInfo(flags, result.mSuggestions);
mSuggestionsCache.putSuggestionsToCache(text, result.mSuggestions, flags);
mSuggestionsCache.putSuggestionsToCache(text, prevWord, result.mSuggestions, flags);
return retval;
} catch (RuntimeException e) {
// Don't kill the keyboard if there is a bug in the spell checker