/*
* Copyright (C) 2008 Torgny Bjers
*
* 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.ss1271.rettiwt.util;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.widget.MultiAutoCompleteTextView.Tokenizer;
/**
* AtTokenizer allows for auto-completion of user names starting with an @ sign.
*
* @author torgny.bjers
*/
public class AtTokenizer implements Tokenizer {
/**
* @see android.widget.MultiAutoCompleteTextView.Tokenizer#findTokenStart(java.lang.CharSequence,
* int)
*/
public int findTokenStart(CharSequence text, int cursor) {
int i = cursor;
while (i > 0 && text.charAt(i - 1) != '@')
i--;
while (i < cursor && text.charAt(i) == ' ')
i++;
return i;
}
/**
* @see android.widget.MultiAutoCompleteTextView.Tokenizer#findTokenEnd(java.lang.CharSequence,
* int)
*/
public int findTokenEnd(CharSequence text, int cursor) {
int i = cursor;
int len = text.length();
while (i < len) {
if (text.charAt(i) == '@') {
return i;
} else {
i++;
}
}
return len;
}
/**
* @see android.widget.MultiAutoCompleteTextView.Tokenizer#terminateToken(java.lang.CharSequence)
*/
public CharSequence terminateToken(CharSequence text) {
int i = text.length();
while (i > 0 && text.charAt(i - 1) == ' ')
i--;
if (i > 0 && text.charAt(i - 1) == '@') {
return text;
} else {
if (text instanceof Spanned) {
SpannableString sp = new SpannableString(text);
TextUtils.copySpansFrom((Spanned) text, 0, text.length(), Object.class, sp, 0);
return sp;
} else {
return text;
}
}
}
}
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