htmllinktag.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.tags;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

import jm.util.html.HTMLNode;
import jm.util.html.HTMLStringNode;
/**
 * Identifies a link tag
 */
public class HTMLLinkTag extends HTMLTag
{
	/**
	 * The URL where the link points to
	 */
	protected String link;
	/**
	 * The text of of the link element
	 */
	protected String linkText;
	/**
	* The contents of link element after the tag
	* added by Kaarle Kaila 23.10.2001
	*/
	protected String linkContents;
	/**
	 * The accesskey existing inside this link.
	 */
	protected String accessKey;
	private java.util.Vector nodeVector;
	private boolean mailLink;
	/**
	 * Constructor creates an HTMLLinkNode object, which basically stores the location
	 * where the link points to, and the text it contains.
	 * @link The URL to which the link points to
	 * @linkText The text which is stored inside this link tag
	 * @linkBegin The beginning position of the link tag
	 * @linkEnd The ending position of the link tag
	 * @param linkContents contains the data from the link element
	 * @accessKey The accessKey element of the link tag (valid for Compact HTML - IMODE devices)
	 */
	public HTMLLinkTag(String link,String linkText,int linkBegin, int linkEnd, String accessKey,String currentLine,Vector nodeVector,boolean mailLink,String tagContents,String linkContents)
	{
		super(linkBegin,linkEnd,tagContents,currentLine);  // Kaarle Kaila 23.10.2001
		this.link = link;
		this.linkText = linkText;
		this.accessKey = accessKey;
		this.nodeVector = nodeVector;
		this.mailLink = mailLink;
		this.linkContents = linkContents;  // Kaarle Kaila 23.10.2001

	}
	/**
	 * Returns the accesskey element if any inside this link tag
   */
	public String getAccessKey()
	{
		return accessKey;
	}
	/**
	 * Returns the url as a string, to which this link points
	 */
	public String getLink()
	{
		return link;
	}
	/**
	 * Returns the text contained inside this link tag
	 */
	public String getLinkText()
	{
		return linkText;
	}
	/**
	 * Return the text contained in this linkinode
	 *  Kaarle Kaila 23.10.2001
	 */
	public String getText()
	{
		return tagContents + ">" + linkContents;
	}
/**
 * Insert the method's description here.
 * Creation date: (8/3/2001 1:49:31 AM)
 * @return boolean
 */
public boolean isMailLink() {
	return mailLink;
}
/**
 * Insert the method's description here.
 * Creation date: (7/1/2001 4:40:58 PM)
 */
public Enumeration linkData()
{
	return nodeVector.elements();
}
	/**
	 * Print the contents of this Link Node
	 */
	public void print()
	{
		System.out.print("Link to : "+link + "; titled : "+linkText+"; begins at : "+elementBegin()+"; ends at : "+elementEnd()+ ", AccessKey=");
		if (accessKey==null) System.out.println("null");
		else System.out.println(accessKey);
		if (linkData()!=null)
		{
			System.out.println("  "+"LinkData");
			System.out.println("  "+"--------");

			HTMLNode node;
			int i = 0;
			for (Enumeration e=linkData();e.hasMoreElements();)
			{
				node = (HTMLNode)e.nextElement();
				System.out.print("   "+(i++)+":");
				node.print();
			}
		}
	}

  public String composeNode() {
    String str = "<" + tagContents + ">";
    for (Enumeration e=linkData();e.hasMoreElements();)
    {
      HTMLNode node = (HTMLNode)e.nextElement();
      if( node instanceof HTMLStringNode );  // String node is in linkContents
      else
        str += node.composeNode();
    }
    str += linkContents + ">";
    return str;
  }

  @SuppressWarnings("unchecked")
public String composeNode(String linkUrl, String linkText) {
    Hashtable param = this.parseParameters();
    // replace tags
    param.put("HREF", linkUrl);
    // compose tag
    String str = "<" + this.getTag();
    for( Enumeration keys=param.keys(); keys.hasMoreElements(); ) {
      String key = (String)keys.nextElement();
      if( key.equals(TAGNAME) || key.indexOf("</A") >= 0 )
        continue;
      String value = (String)param.get(key);
      str += " " + key + "=\"" + value + "\"";
    }
    str += ">";
    for (Enumeration e=linkData();e.hasMoreElements();)
    {
      HTMLNode node = (HTMLNode)e.nextElement();
      if( node instanceof HTMLStringNode );  // String node is in linkContents
      else
        str += node.composeNode();
    }
    str += linkText + "</a>";
    return str;
  }

  /**
   * write a new toString method to display all info of the link node
   * @return
   */
  public String toString() {
    return composeNode();
  }
/* close the origional toString method
        public String toString() {
          return "Link Tag : "+link;
        }
*/
/**
 * Insert the method's description here.
 * Creation date: (8/3/2001 1:49:31 AM)
 * @param newMailLink boolean
 */
public void setMailLink(boolean newMailLink) {
	mailLink = newMailLink;
}
/**
 * Insert the method's description here.
 * Creation date: (7/1/2001 4:39:41 PM)
 * @param newNodeVector java.util.Vector
 */
public void setNodeVector(java.util.Vector newNodeVector) {
	nodeVector = newNodeVector;
}
}