ReferenceEntry.java

/*
 * $Id$
 *
 * Copyright (c) 2004-2005 by the TeXlapse Team.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package net.sourceforge.texlipse.model;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;


/**
 * A class for containing LaTeX references (\label and BibTeX)
 * 
 * @author Oskar Ojala
 */
public final class ReferenceEntry extends AbstractEntry {

    /**
     * A descriptive text of the reference
     */
    public String info;
    /**
     * The end line of the reference declaration (used for BibTeX editing)
     */
    public int endLine;
    // FIXME
    public String author;
    public String journal;
    public String year;
    
    /**
     * The document of the reference declaration (used for BibTeX viewing)
     */
    public File refFile;
    
    /**
     * Constructs a new entry with the given key (reference key/name)
     * 
     * @param key Reference key
     */
    public ReferenceEntry(String key) {
        this.key = key;
    }
    
    /**
     * Constructs a new entry with the given key (Reference key/name)
     * and a descriptive text telling something about the reference
     * (used for BibTeX).
     * 
     * @param key Reference key
     * @param info A descriptive text of the reference
     */
    public ReferenceEntry(String key, String info) {
        this.key = key;
        this.info = info;
    }
        
    /**
     * Returns a shallow copy of this reference
     * 
     * @return A copy of this reference
     */
    public AbstractEntry copy() {
        ReferenceEntry re = new ReferenceEntry(key, info);
        re.startLine = startLine;
        re.endLine = endLine;
        re.author = author;
        re.journal = journal;
        re.year = year;
        re.refFile = refFile;
        re.fileName = fileName;
        re.position = position;
        return re;
    }
    
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    public String toString() {
        return key;
    }
    
    private int labelPrecedingLines = 2;
    private int labelFollowingLines = 2;
    
    public void setLabelInfo(String input) {
    	int lineno = startLine;
        StringBuilder extract = new StringBuilder();
        try {
            BufferedReader in = new BufferedReader(new StringReader(input));
            int currentLine = 0;
            int startLine = (lineno - labelPrecedingLines) >= 0 ?
                    lineno - labelPrecedingLines : 0;
            int endLine = lineno + labelFollowingLines;
            String str;
            while ((str = in.readLine()) != null) {
                if (currentLine > endLine) {
                    break;
                } else if (currentLine >= startLine) {
                    extract.append(str);
                    extract.append(System.getProperty("line.separator"));
                }
                currentLine++;
            }
            in.close();
        } catch (IOException e) {
        }
        info = extract.toString();
    }

}