/*:folding=indent:
* BibTeXPanel.java - BibTeX Dialog
* Copyright (C) 2002 Anthony Roy
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
package uk.co.antroy.latextools;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JList;
import javax.swing.JScrollPane;

import org.gjt.sp.jedit.Buffer;
import org.gjt.sp.jedit.View;
import org.gjt.sp.jedit.gui.EnhancedDialog;
import org.gjt.sp.jedit.jEdit;

import uk.co.antroy.latextools.macros.ProjectMacros;
import uk.co.antroy.latextools.parsers.BibEntry;
import uk.co.antroy.latextools.parsers.BibTeXParser;


public class BibTeXPanel
    extends AbstractToolPanel {

    //~ Instance/static variables .............................................

    private JList bibList = new JList();
    private ActionListener insert;

    //~ Constructors ..........................................................

    /**
     * Creates a new BibTeXPanel object.
     * 
     * @param view the current view
     * @param buff the active buffer
     */
    public BibTeXPanel(View view, Buffer buff) {
        super(view, buff, "Bib");
        refresh();
    }

    //~ Methods ...............................................................

    /**
     * ¤
     * 
     * @param view ¤
     * @param buff ¤
     */
    public static void createBibTeXDialog(View view, Buffer buff) {

        final BibTeXPanel n = new BibTeXPanel(view, buff);
        EnhancedDialog ed = new EnhancedDialog(view, "Insert Citation", false) {
            public void cancel() {
                this.hide();
            }

            public void ok() {
                n.insert();
                this.hide();
            }
        };

        ed.setContentPane(n);
        ed.pack();
        ed.show();
    }

    /**
     * ¤
     */
    public void refresh() {
        removeAll();

        if (!ProjectMacros.isTeXFile(buffer)) {
            displayNotTeX(BorderLayout.CENTER);
        } else {
            buildList();

            JScrollPane scp = new JScrollPane(bibList, 
                                              JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, 
                                              JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
            setLayout(new BorderLayout());
            setPreferredSize(new Dimension(400, 400));
            add(scp, BorderLayout.CENTER);
        }

        repaint();
    }

    public void reload() {
    }

    private void buildList() {

        BibTeXParser parser = new BibTeXParser(view, buffer);
        Object[] be = parser.getBibEntryArray();
        bibList = null;
        bibList = new JList(be);
        bibList.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {

                if (e.getClickCount() == 2) {
                    insert();
                }
            }
        });
        bibList.addKeyListener(new KeyAdapter() {
            public void keyReleased(KeyEvent e) {

                if (e.getKeyCode() == e.VK_ENTER) {
                    insert();
                }
            }
        });
    }

    private void insert() {

        Object[] sels = bibList.getSelectedValues();

        if (sels.length == 0) {
            System.err.println("Code should have returned by now!");

            return;
        }

        BibEntry bi = (BibEntry)sels[0];
        StringBuffer sb = new StringBuffer(bi.getRef());

        for (int i = 1; i < sels.length; i++) {
            bi = (BibEntry)sels[i];
            sb.append(",");
            sb.append(bi.getRef());
        }

        if (jEdit.getBooleanProperty("bibtex.inserttags")) {
            sb.insert(0, "\\cite{");
            sb.append("}");
        }

        int posn = view.getTextArea().getCaretPosition();
        buffer.insert(posn, sb.toString());
    }
}