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/*
* Copyright (C) 2008-2009 Google Inc.
*
* 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 java.util.ArrayList;
import java.util.List;
/**
* A place to store the currently composing word with information such as adjacent key codes as well
*/
public class WordComposer {
/**
* The list of unicode values for each keystroke (including surrounding keys)
*/
private List<int[]> mCodes;
/**
* The word chosen from the candidate list, until it is committed.
*/
private String mPreferredWord;
private StringBuilder mTypedWord;
/**
* Whether the user chose to capitalize the word.
*/
private boolean mIsCapitalized;
WordComposer() {
mCodes = new ArrayList<int[]>(12);
mTypedWord = new StringBuilder(20);
}
/**
* Clear out the keys registered so far.
*/
public void reset() {
mCodes.clear();
mIsCapitalized = false;
mPreferredWord = null;
mTypedWord.setLength(0);
}
/**
* Number of keystrokes in the composing word.
* @return the number of keystrokes
*/
public int size() {
return mCodes.size();
}
/**
* Returns the codes at a particular position in the word.
* @param index the position in the word
* @return the unicode for the pressed and surrounding keys
*/
public int[] getCodesAt(int index) {
return mCodes.get(index);
}
/**
* Add a new keystroke, with codes[0] containing the pressed key's unicode and the rest of
* the array containing unicode for adjacent keys, sorted by reducing probability/proximity.
* @param codes the array of unicode values
*/
public void add(int primaryCode, int[] codes) {
mTypedWord.append((char) primaryCode);
mCodes.add(codes);
}
/**
* Delete the last keystroke as a result of hitting backspace.
*/
public void deleteLast() {
mCodes.remove(mCodes.size() - 1);
mTypedWord.deleteCharAt(mTypedWord.length() - 1);
}
/**
* Returns the word as it was typed, without any correction applied.
* @return the word that was typed so far
*/
public CharSequence getTypedWord() {
int wordSize = mCodes.size();
if (wordSize == 0) {
return null;
}
// StringBuffer sb = new StringBuffer(wordSize);
// for (int i = 0; i < wordSize; i++) {
// char c = (char) mCodes.get(i)[0];
// if (i == 0 && mIsCapitalized) {
// c = Character.toUpperCase(c);
// }
// sb.append(c);
// }
// return sb;
return mTypedWord;
}
public void setCapitalized(boolean capitalized) {
mIsCapitalized = capitalized;
}
/**
* Whether or not the user typed a capital letter as the first letter in the word
* @return capitalization preference
*/
public boolean isCapitalized() {
return mIsCapitalized;
}
/**
* Stores the user's selected word, before it is actually committed to the text field.
* @param preferred
*/
public void setPreferredWord(String preferred) {
mPreferredWord = preferred;
}
/**
* Return the word chosen by the user, or the typed word if no other word was chosen.
* @return the preferred word
*/
public CharSequence getPreferredWord() {
return mPreferredWord != null ? mPreferredWord : getTypedWord();
}
}