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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.android.inputmethod.latin;
import com.android.inputmethod.keyboard.Key;
import com.android.inputmethod.keyboard.KeyDetector;
import com.android.inputmethod.keyboard.KeyboardId;
import com.android.inputmethod.keyboard.LatinKeyboard;
import com.android.inputmethod.keyboard.ProximityKeyDetector;
import android.content.Context;
import android.text.TextUtils;
import java.io.File;
import java.util.List;
public class SuggestHelper {
protected final Suggest mSuggest;
private final LatinKeyboard mKeyboard;
private final KeyDetector mKeyDetector;
public SuggestHelper(Context context, int dictionaryId, KeyboardId keyboardId) {
mSuggest = new Suggest(context, dictionaryId);
mKeyboard = new LatinKeyboard(context, keyboardId);
mKeyDetector = new ProximityKeyDetector();
init();
}
protected SuggestHelper(Context context, File dictionaryPath, long startOffset, long length,
KeyboardId keyboardId) {
mSuggest = new Suggest(dictionaryPath, startOffset, length);
mKeyboard = new LatinKeyboard(context, keyboardId);
mKeyDetector = new ProximityKeyDetector();
init();
}
private void init() {
mSuggest.setQuickFixesEnabled(false);
mSuggest.setCorrectionMode(Suggest.CORRECTION_FULL);
mKeyDetector.setKeyboard(mKeyboard, 0, 0);
mKeyDetector.setProximityCorrectionEnabled(true);
mKeyDetector.setProximityThreshold(KeyDetector.getMostCommonKeyWidth(mKeyboard));
}
public void setCorrectionMode(int correctionMode) {
mSuggest.setCorrectionMode(correctionMode);
}
public boolean hasMainDictionary() {
return mSuggest.hasMainDictionary();
}
private void addKeyInfo(WordComposer word, char c) {
final List<Key> keys = mKeyboard.getKeys();
for (final Key key : keys) {
if (key.mCode == c) {
final int x = key.mX + key.mWidth / 2;
final int y = key.mY + key.mHeight / 2;
final int[] codes = mKeyDetector.newCodeArray();
mKeyDetector.getKeyIndexAndNearbyCodes(x, y, codes);
word.add(c, codes, x, y);
return;
}
}
word.add(c, new int[] { c }, WordComposer.NOT_A_COORDINATE, WordComposer.NOT_A_COORDINATE);
}
protected WordComposer createWordComposer(CharSequence s) {
WordComposer word = new WordComposer();
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
addKeyInfo(word, c);
}
return word;
}
public boolean isValidWord(CharSequence typed) {
return AutoCorrection.isValidWordForAutoCorrection(mSuggest.getUnigramDictionaries(),
typed, false);
}
// TODO: This may be slow, but is OK for test so far.
public SuggestedWords getSuggestions(CharSequence typed) {
return mSuggest.getSuggestions(null, createWordComposer(typed), null);
}
public CharSequence getFirstSuggestion(CharSequence typed) {
WordComposer word = createWordComposer(typed);
SuggestedWords suggestions = mSuggest.getSuggestions(null, word, null);
// Note that suggestions.getWord(0) is the word user typed.
return suggestions.size() > 1 ? suggestions.getWord(1) : null;
}
public CharSequence getAutoCorrection(CharSequence typed) {
WordComposer word = createWordComposer(typed);
SuggestedWords suggestions = mSuggest.getSuggestions(null, word, null);
// Note that suggestions.getWord(0) is the word user typed.
return (suggestions.size() > 1 && mSuggest.hasAutoCorrection())
? suggestions.getWord(1) : null;
}
public int getSuggestIndex(CharSequence typed, CharSequence expected) {
WordComposer word = createWordComposer(typed);
SuggestedWords suggestions = mSuggest.getSuggestions(null, word, null);
// Note that suggestions.getWord(0) is the word user typed.
for (int i = 1; i < suggestions.size(); i++) {
if (TextUtils.equals(suggestions.getWord(i), expected))
return i;
}
return -1;
}
private void getBigramSuggestions(CharSequence previous, CharSequence typed) {
if (!TextUtils.isEmpty(previous) && (typed.length() > 1)) {
WordComposer firstChar = createWordComposer(Character.toString(typed.charAt(0)));
mSuggest.getSuggestions(null, firstChar, previous);
}
}
public CharSequence getBigramFirstSuggestion(CharSequence previous, CharSequence typed) {
WordComposer word = createWordComposer(typed);
getBigramSuggestions(previous, typed);
SuggestedWords suggestions = mSuggest.getSuggestions(null, word, previous);
return suggestions.size() > 1 ? suggestions.getWord(1) : null;
}
public CharSequence getBigramAutoCorrection(CharSequence previous, CharSequence typed) {
WordComposer word = createWordComposer(typed);
getBigramSuggestions(previous, typed);
SuggestedWords suggestions = mSuggest.getSuggestions(null, word, previous);
return (suggestions.size() > 1 && mSuggest.hasAutoCorrection())
? suggestions.getWord(1) : null;
}
public int searchBigramSuggestion(CharSequence previous, CharSequence typed,
CharSequence expected) {
WordComposer word = createWordComposer(typed);
getBigramSuggestions(previous, typed);
SuggestedWords suggestions = mSuggest.getSuggestions(null, word, previous);
for (int i = 1; i < suggestions.size(); i++) {
if (TextUtils.equals(suggestions.getWord(i), expected))
return i;
}
return -1;
}
}
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