gotoaction.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * GoToAction.java - Action to "goto" a specific line number in RText.
 * Copyright (C) 2003 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * This file is a part of RText.
 *
 * RText 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.
 *
 * RText 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 org.fife.rtext;

import java.awt.event.ActionEvent;
import java.util.ResourceBundle;
import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.KeyStroke;
import javax.swing.text.BadLocationException;


/**
 * Action used by an <code>AbstractMainView</code> to "goto" a specific line
 * number in the current document.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class GoToAction extends AbstractAction {

	private RText rtext;


/*****************************************************************************/


	/**
	 * Creates a new <code>GoToAction</code>.
	 *
	 * @param text The text associated with the action.
	 * @param icon The icon associated with the action.
	 * @param desc The description of the action (used in tooltips???).
	 * @param mnemonic The mnemonic for the action.
	 * @param accelerator The accelerator key for the action.
	 */
	public GoToAction(String text, ImageIcon icon, String desc,
						Integer mnemonic, KeyStroke accelerator,
						RText rtext) {
		super(text, icon);
		putValue(ACCELERATOR_KEY, accelerator);
		putValue(SHORT_DESCRIPTION, desc);
		putValue(MNEMONIC_KEY, mnemonic);
		this.rtext = rtext;
	}


/*****************************************************************************/


	public void actionPerformed(ActionEvent e) {

		AbstractMainView mainView = rtext.getMainView();

		// Initializing the dialog now saves on load time when we first bring rtext up.
		if (mainView.goToDialog==null)
			mainView.goToDialog = new GoToDialog(rtext, mainView);

		// Prepare and show the GoTo Line dialog.
		mainView.goToDialog.setMaxLineNumberAllowed(mainView.currentTextArea.getLineCount());
		mainView.goToDialog.setVisible(true);

		// If a real line number is returned, go to that line number.
		int lineNumber = mainView.goToDialog.getLineNumber();
		if (lineNumber != -1) {

			try {
				mainView.currentTextArea.setCaretPosition(
					mainView.currentTextArea.getLineStartOffset(lineNumber-1));
			} catch (BadLocationException ble) {
				ResourceBundle msg = rtext.getResourceBundle();
				String temp = msg.getString("InternalErrorILN").
						replaceFirst("%lineNumber%", String.valueOf(lineNumber));
				JOptionPane.showMessageDialog(null, temp,
						msg.getString("ErrorDialogTitle"),
						JOptionPane.ERROR_MESSAGE);
			}

		}

	}


/*****************************************************************************/

}