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Support multiple locales in distractor filter. 

Bug: 16547557
Change-Id: I4aba278eb4114e0075f3f8b38c7e132743927fa8
main
Keisuke Kuroyanagi 2014-08-29 22:29:30 +09:00
parent e59f3e4fbf
commit fdaedb6c1d
1 changed files with 66 additions and 63 deletions
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129
java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java
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@ -20,12 +20,14 @@ import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import android.content.Context;
import android.content.res.Resources;
import android.text.InputType;
import android.util.Log;
import android.util.LruCache;
import android.util.Pair;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodSubtype;
@ -49,16 +51,15 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
DistracterFilterCheckingExactMatchesAndSuggestions.class.getSimpleName();
private static final boolean DEBUG = false;
private static final int MAX_DISTRACTERS_CACHE_SIZE = 512;
private static final int MAX_DISTRACTERS_CACHE_SIZE = 1024;
private final Context mContext;
private final Map<Locale, InputMethodSubtype> mLocaleToSubtypeMap;
private final Map<Locale, Keyboard> mLocaleToKeyboardMap;
private final ConcurrentHashMap<Locale, InputMethodSubtype> mLocaleToSubtypeCache;
private final ConcurrentHashMap<Locale, Keyboard> mLocaleToKeyboardCache;
private final DictionaryFacilitatorLruCache mDictionaryFacilitatorLruCache;
private final LruCache<String, Boolean> mDistractersCache;
// TODO: Remove and support multiple locales at the same time.
private Locale mCurrentLocale;
private Keyboard mKeyboard;
// The key is a pair of a locale and a word. The value indicates the word is a distracter to
// words of the locale.
private final LruCache<Pair<Locale, String>, Boolean> mDistractersCache;
private final Object mLock = new Object();
// If the score of the top suggestion exceeds this value, the tested word (e.g.,
@ -78,20 +79,17 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
public DistracterFilterCheckingExactMatchesAndSuggestions(final Context context,
final DictionaryFacilitatorLruCache dictionaryFacilitatorLruCache) {
mContext = context;
mLocaleToSubtypeMap = new HashMap<>();
mLocaleToKeyboardMap = new HashMap<>();
mLocaleToSubtypeCache = new ConcurrentHashMap<>();
mLocaleToKeyboardCache = new ConcurrentHashMap<>();
mDictionaryFacilitatorLruCache = dictionaryFacilitatorLruCache;
mDistractersCache = new LruCache<>(MAX_DISTRACTERS_CACHE_SIZE);
mCurrentLocale = null;
mKeyboard = null;
}
@Override
public void close() {
mLocaleToKeyboardMap.clear();
mLocaleToSubtypeCache.clear();
mLocaleToKeyboardCache.clear();
mDistractersCache.evictAll();
mCurrentLocale = null;
mKeyboard = null;
}
@Override
@ -108,29 +106,36 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
newLocaleToSubtypeMap.put(locale, subtype);
}
}
if (mLocaleToSubtypeMap.equals(newLocaleToSubtypeMap)) {
if (mLocaleToSubtypeCache.equals(newLocaleToSubtypeMap)) {
// Enabled subtypes have not been changed.
return;
}
synchronized (mLock) {
mLocaleToSubtypeMap.clear();
mLocaleToSubtypeMap.putAll(newLocaleToSubtypeMap);
mLocaleToKeyboardMap.clear();
// Update subtype and keyboard map for locales that are in the current mapping.
for (final Locale locale: mLocaleToSubtypeCache.keySet()) {
if (newLocaleToSubtypeMap.containsKey(locale)) {
final InputMethodSubtype newSubtype = newLocaleToSubtypeMap.remove(locale);
if (newSubtype.equals(newLocaleToSubtypeMap.get(locale))) {
// Mapping has not been changed.
continue;
}
mLocaleToSubtypeCache.replace(locale, newSubtype);
} else {
mLocaleToSubtypeCache.remove(locale);
}
mLocaleToKeyboardCache.remove(locale);
}
// Add locales that are not in the current mapping.
mLocaleToSubtypeCache.putAll(newLocaleToSubtypeMap);
}
private void loadKeyboardForLocale(final Locale newLocale) {
final Keyboard cachedKeyboard = mLocaleToKeyboardMap.get(newLocale);
private Keyboard getKeyboardForLocale(final Locale locale) {
final Keyboard cachedKeyboard = mLocaleToKeyboardCache.get(locale);
if (cachedKeyboard != null) {
mKeyboard = cachedKeyboard;
return;
}
final InputMethodSubtype subtype;
synchronized (mLock) {
subtype = mLocaleToSubtypeMap.get(newLocale);
return cachedKeyboard;
}
final InputMethodSubtype subtype = mLocaleToSubtypeCache.get(locale);
if (subtype == null) {
return;
return null;
}
final EditorInfo editorInfo = new EditorInfo();
editorInfo.inputType = InputType.TYPE_CLASS_TEXT;
@ -143,7 +148,9 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
builder.setSubtype(new RichInputMethodSubtype(subtype));
builder.setIsSpellChecker(false /* isSpellChecker */);
final KeyboardLayoutSet layoutSet = builder.build();
mKeyboard = layoutSet.getKeyboard(KeyboardId.ELEMENT_ALPHABET);
final Keyboard newKeyboard = layoutSet.getKeyboard(KeyboardId.ELEMENT_ALPHABET);
mLocaleToKeyboardCache.put(locale, newKeyboard);
return newKeyboard;
}
/**
@ -161,24 +168,18 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
if (locale == null) {
return false;
}
if (!locale.equals(mCurrentLocale)) {
synchronized (mLock) {
if (!mLocaleToSubtypeMap.containsKey(locale)) {
Log.e(TAG, "Locale " + locale + " is not enabled.");
// TODO: Investigate what we should do for disabled locales.
return false;
}
mCurrentLocale = locale;
loadKeyboardForLocale(locale);
mDistractersCache.evictAll();
}
if (!mLocaleToSubtypeCache.containsKey(locale)) {
Log.e(TAG, "Locale " + locale + " is not enabled.");
// TODO: Investigate what we should do for disabled locales.
return false;
}
final DictionaryFacilitator dictionaryFacilitator =
mDictionaryFacilitatorLruCache.get(locale);
if (DEBUG) {
Log.d(TAG, "testedWord: " + testedWord);
}
final Boolean isCachedDistracter = mDistractersCache.get(testedWord);
final Pair<Locale, String> cacheKey = new Pair<>(locale, testedWord);
final Boolean isCachedDistracter = mDistractersCache.get(cacheKey);
if (isCachedDistracter != null && isCachedDistracter) {
if (DEBUG) {
Log.d(TAG, "isDistracter: true (cache hit)");
@ -189,8 +190,8 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
final boolean isDistracterCheckedByGetMaxFreqencyOfExactMatches =
checkDistracterUsingMaxFreqencyOfExactMatches(dictionaryFacilitator, testedWord);
if (isDistracterCheckedByGetMaxFreqencyOfExactMatches) {
// Add the word to the cache.
mDistractersCache.put(testedWord, Boolean.TRUE);
// Add the pair of locale and word to the cache.
mDistractersCache.put(cacheKey, Boolean.TRUE);
return true;
}
final boolean isValidWord = dictionaryFacilitator.isValidWord(testedWord,
@ -203,11 +204,12 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
return false;
}
final Keyboard keyboard = getKeyboardForLocale(locale);
final boolean isDistracterCheckedByGetSuggestion =
checkDistracterUsingGetSuggestions(dictionaryFacilitator, testedWord);
checkDistracterUsingGetSuggestions(dictionaryFacilitator, keyboard, testedWord);
if (isDistracterCheckedByGetSuggestion) {
// Add the word to the cache.
mDistractersCache.put(testedWord, Boolean.TRUE);
// Add the pair of locale and word to the cache.
mDistractersCache.put(cacheKey, Boolean.TRUE);
return true;
}
return false;
@ -229,8 +231,9 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
}
private boolean checkDistracterUsingGetSuggestions(
final DictionaryFacilitator dictionaryFacilitator, final String testedWord) {
if (mKeyboard == null) {
final DictionaryFacilitator dictionaryFacilitator, final Keyboard keyboard,
final String testedWord) {
if (keyboard == null) {
return false;
}
final SettingsValuesForSuggestion settingsValuesForSuggestion =
@ -243,24 +246,24 @@ public class DistracterFilterCheckingExactMatchesAndSuggestions implements Distr
testedWord;
final WordComposer composer = new WordComposer();
final int[] codePoints = StringUtils.toCodePointArray(testedWord);
final int[] coordinates = keyboard.getCoordinates(codePoints);
composer.setComposingWord(codePoints, coordinates);
final SuggestionResults suggestionResults;
synchronized (mLock) {
final int[] coordinates = mKeyboard.getCoordinates(codePoints);
composer.setComposingWord(codePoints, coordinates);
final SuggestionResults suggestionResults = dictionaryFacilitator.getSuggestionResults(
composer, PrevWordsInfo.EMPTY_PREV_WORDS_INFO, mKeyboard.getProximityInfo(),
suggestionResults = dictionaryFacilitator.getSuggestionResults(
composer, PrevWordsInfo.EMPTY_PREV_WORDS_INFO, keyboard.getProximityInfo(),
settingsValuesForSuggestion, 0 /* sessionId */);
if (suggestionResults.isEmpty()) {
return false;
}
final SuggestedWordInfo firstSuggestion = suggestionResults.first();
final boolean isDistractor = suggestionExceedsDistracterThreshold(
firstSuggestion, consideredWord, DISTRACTER_WORD_SCORE_THRESHOLD);
if (DEBUG) {
Log.d(TAG, "isDistracter: " + isDistractor);
}
return isDistractor;
}
if (suggestionResults.isEmpty()) {
return false;
}
final SuggestedWordInfo firstSuggestion = suggestionResults.first();
final boolean isDistractor = suggestionExceedsDistracterThreshold(
firstSuggestion, consideredWord, DISTRACTER_WORD_SCORE_THRESHOLD);
if (DEBUG) {
Log.d(TAG, "isDistracter: " + isDistractor);
}
return isDistractor;
}
private static boolean suggestionExceedsDistracterThreshold(final SuggestedWordInfo suggestion,