htmlstringnode.java

梦界家园程序开发基底框架

// HTMLParser Library v1.1 - A java-based parser for HTML
// Copyright (C) Dec 31, 2000 Somik Raha
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// For any questions or suggestions, you can write to me at :
// Email :[e-mail]
//
// Postal Address :
// Somik Raha
// R&D Team
// Kizna Corporation
// Hiroo ON Bldg. 2F, 5-19-9 Hiroo,
// Shibuya-ku, Tokyo,
// 150-0012,
// JAPAN
// Tel  :  [phone]
// Fax : [phone]
// Website : www.kizna.com

package jm.util.html;
/**
 * Normal text in the html document is identified and represented by this class.
 */
public class HTMLStringNode implements HTMLNode
{
	/**
	 * The text of the string.
   */
	protected String text;
  /**
	 * The beginning position of the tag in the line
	 */
	protected int textBegin;
	/**
	 * The ending position of the tag in the line
	 */
	protected int textEnd;
	/**
	 * Constructor takes in the text string, beginning and ending posns.
	 * @param text The contents of the string line
	 * @param textBegin The beginning position of the string
	 * @param textEnd The ending positiong of the string
	 */
	public HTMLStringNode(String text,int textBegin,int textEnd)
	{
		this.text = text;
		this.textBegin = textBegin;
		this.textEnd = textEnd;
	}
	/**
	 * Returns the beginning position of the string.
	 */
	public int elementBegin()
	{
		return textBegin;
	}
	/**
	 * Returns the ending position fo the tag
	 */
	public int elementEnd()
	{
		return textEnd;
	}
	/**
	 * Locate the remark tag withing the input string, by parsing from the given position
	 * @param reader HTML reader to be provided so as to allow reading of next line
	 * @param input Input String
	 * @param position Position to start parsing from
	 */
	public static HTMLNode find(HTMLReader reader,String input,int position)
	{
		String text = "";
		int state = 0;
		int textBegin=position;
		int textEnd=position;
		for (int i=position;(i<input.length() && state!=2);i++)
		{
			// When the input has ended but no text is found, we end up returning null
			if (input.charAt(i)=='<' && state==0)
			{
				return null;
			}
			if (input.charAt(i)=='<')
			{
				state = 2;
				textEnd=i-1;
			}
			if (state==0)
			{
				if (input.charAt(i)!=' ') state=1;
				else text+=input.charAt(i);
			}
			if (state==1)
			{
				text+=input.charAt(i);
			}
			if (state==1 && i==input.length()-1)
			{
				state=2;
				textEnd=i;
			}
		}
		if (textBegin<=textEnd) return new HTMLStringNode(text,textBegin,textEnd);
		else return null;
	}
	/**
	 * Returns the text of the string line
	 */
	public String getText()
	{
		return text;
	}
	/**
	 * Print the contents of the string line.
	 */
	public void print()
	{
		System.out.println("Text = "+text+"; begins at : "+elementBegin()+"; ends at : "+elementEnd());
	}

  public String composeNode() {
    return getText();
  }

        public String toString() {
          return text;
        }
}