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Cache results of the spell checker

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Change-Id: Ie11cd1b07e069474b140fbaae65fca703adc056f
This commit is contained in:
satok 2012-04-17 19:31:09 +09:00
parent 761b6bc120
commit 74a84febc7
1 changed files with 42 additions and 2 deletions
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44
java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
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@ -18,11 +18,11 @@ package com.android.inputmethod.latin.spellcheck;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.preference.PreferenceManager;
import android.service.textservice.SpellCheckerService;
import android.text.TextUtils;
import android.util.Log;
import android.util.LruCache;
import android.view.textservice.SuggestionsInfo;
import android.view.textservice.TextInfo;
@ -455,6 +455,35 @@ public class AndroidSpellCheckerService extends SpellCheckerService
private final AndroidSpellCheckerService mService;
private final SuggestionsCache mSuggestionsCache = new SuggestionsCache();
private static class SuggestionsParams {
public final String[] mSuggestions;
public final int mFlags;
public SuggestionsParams(String[] suggestions, int flags) {
mSuggestions = suggestions;
mFlags = flags;
}
}
private static class SuggestionsCache {
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);
}
public void putSuggestionsToCache(String query, String[] suggestions, int flags) {
if (suggestions == null || TextUtils.isEmpty(query)) {
return;
}
mUnigramSuggestionsInfoCache.put(query, new SuggestionsParams(suggestions, flags));
}
}
AndroidSpellCheckerSession(final AndroidSpellCheckerService service) {
mService = service;
}
@ -546,6 +575,15 @@ public class AndroidSpellCheckerService extends SpellCheckerService
final int suggestionsLimit) {
try {
final String text = textInfo.getText();
final SuggestionsParams cachedSuggestionsParams =
mSuggestionsCache.getSuggestionsFromCache(text);
if (cachedSuggestionsParams != null) {
if (DBG) {
Log.d(TAG, "Cache hit: " + text + ", " + cachedSuggestionsParams.mFlags);
}
return new SuggestionsInfo(
cachedSuggestionsParams.mFlags, cachedSuggestionsParams.mSuggestions);
}
if (shouldFilterOut(text, mScript)) {
DictAndProximity dictInfo = null;
@ -628,7 +666,9 @@ public class AndroidSpellCheckerService extends SpellCheckerService
? SuggestionsInfoCompatUtils
.getValueOf_RESULT_ATTR_HAS_RECOMMENDED_SUGGESTIONS()
: 0);
return new SuggestionsInfo(flags, result.mSuggestions);
final SuggestionsInfo retval = new SuggestionsInfo(flags, result.mSuggestions);
mSuggestionsCache.putSuggestionsToCache(text, result.mSuggestions, flags);
return retval;
} catch (RuntimeException e) {
// Don't kill the keyboard if there is a bug in the spell checker
if (DBG) {