package com.vci.rmip.code.client.codeapply.Apply410.swing;

import java.io.Serializable;
import java.util.LinkedList;
import java.util.regex.Pattern;

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;

/**
 * 
 * @author xiongchao
 *
 */
public class NumberPlainDocument  extends PlainDocument implements Serializable {

	/**
	 * 
	 */
	private static final long serialVersionUID = 3552883300862479018L;
	/**
	 * 
	 */
	
	boolean floatFlag = false;
	public NumberPlainDocument(boolean floatFlag){
		this.floatFlag = floatFlag;
	}
	
	public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
		if (str == null) {
			return;
		}
		char[] chars = str.toCharArray();
		LinkedList<Character> charsList = new LinkedList<Character>();
		for(char c : chars){
			// -号要么出现，且只能在最前面，要到不出现
			if(offs != 0 && pMinus.matcher(String.valueOf(c)).matches()){
				continue;
			}
			// 匹配数字
			if(pNum.matcher(String.valueOf(c)).matches()){
				charsList.add(c);
			} 
			// 匹配减号
			else if(pMinus.matcher(String.valueOf(c)).matches()){
				charsList.add(c);
			}
			else if(String.valueOf(c).equals(".")){
				if(floatFlag){
					charsList.add(c);
				}
			}
		}
		char[] charsNew = new char[charsList.size()];
		for(int i = 0; i < charsNew.length; i++){
			charsNew[i] = charsList.get(i);
		}
		super.insertString(offs, new String(charsNew), a);
	}
	
	private Pattern pNum = Pattern.compile("\\d+");
	private Pattern pMinus = Pattern.compile("-?");
}