content: // This file is part of AceWiki.
  // Copyright 2008-2013, AceWiki developers.
  // 
  // AceWiki 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 3 of
  // the License, or (at your option) any later version.
  // 
  // AceWiki 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 AceWiki. If
  // not, see http://www.gnu.org/licenses/.
  
  package ch.uzh.ifi.attempto.acewiki.gui;
  
  import nextapp.echo.app.Button;
  import nextapp.echo.app.Color;
  import nextapp.echo.app.Extent;
  import nextapp.echo.app.Font;
  import nextapp.echo.app.Insets;
  import nextapp.echo.app.event.ActionEvent;
  import nextapp.echo.app.event.ActionListener;
  import ch.uzh.ifi.attempto.acewiki.Wiki;
  import ch.uzh.ifi.attempto.acewiki.core.GeneralTopic;
  import ch.uzh.ifi.attempto.acewiki.core.LanguageUtils;
  import ch.uzh.ifi.attempto.acewiki.core.OntologyElement;
  import ch.uzh.ifi.attempto.acewiki.core.OntologyTextElement;
  import ch.uzh.ifi.attempto.acewiki.core.ModuleElement;
  import ch.uzh.ifi.attempto.echocomp.Style;
  
  /**
   * This class represents a wiki-internal link.
   * 
   * @author Tobias Kuhn
   */
  public class WikiLink extends Button implements ActionListener {
  	
  	private static final long serialVersionUID = -2234400779848457043L;
  	
  	private OntologyElement ontologyElement;
  	private Wiki wiki;
  	
  	/**
  	 * Creates a new link to the article of the given ontology element. The headword of the
  	 * ontology element is used as the link text.
  	 * 
  	 * @param ontologyElement The ontology element whose article should be linked.
  	 * @param wiki The wiki instance.
  	 */
  	public WikiLink(OntologyElement ontologyElement, Wiki wiki) {
  		super(LanguageUtils.getHeading(ontologyElement));
  		this.wiki = wiki;
  		this.ontologyElement = ontologyElement;
  		initButton(false);
  	}
  	
  	/**
  	 * Creates a new link to the article of the given ontology element.
  	 * 
  	 * @param ontologyElement The ontology element whose article should be linked.
  	 * @param text The link text.
  	 * @param wiki The wiki instance.
  	 * @param red true if the link text should be displayed in red font.
  	 */
  	public WikiLink(OntologyElement ontologyElement, String text, Wiki wiki, boolean red) {
  		super(text);
  		this.wiki = wiki;
  		this.ontologyElement = ontologyElement;
  		initButton(red);
  	}
  	
  	/**
  	 * Creates a new wiki link on the basis of a text element. It links to the article of the
  	 * ontology element of the text element. The text of the text element is used as the link
  	 * text.
  	 * 
  	 * @param textElement The text element.
  	 * @param wiki The wiki instance.
  	 * @param red true if the link text should be displayed in red font.
  	 */
  	public WikiLink(OntologyTextElement textElement, Wiki wiki, boolean red) {
  		super(textElement.getText());
  		this.wiki = wiki;
  		this.ontologyElement = textElement.getOntologyElement();
  		initButton(red);
  	}
  	
  	private void initButton(boolean red) {
  		setInsets(new Insets(0, 0, 0, 0));
  		setLineWrap(false);
  		setRolloverEnabled(true);
  		if (ontologyElement instanceof GeneralTopic) {
  			setFont(new Font(Style.fontTypeface, Font.ITALIC, new Extent(13)));
  		} else if (ontologyElement instanceof ModuleElement) {
  			setFont(new Font(Font.MONOSPACE, Font.PLAIN, new Extent(12)));
  			setForeground(Style.specialForeground);
  		} else {
  			setFont(new Font(Style.fontTypeface, Font.PLAIN, new Extent(13)));
  		}
  		setRolloverForeground(Color.BLUE);
  		if (red) setForeground(new Color(180, 0, 0));
  		addActionListener(this);
  	}
  
  	public void actionPerformed(ActionEvent e) {
  		wiki.log("page", "pressed: link " + ontologyElement.getWord());
  		wiki.showPage(ontologyElement);
  	}
  
  }
  