openfilefromhistoryaction.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * OpenFileFromHistoryAction.java - Action to open a file from the "history"
 *                                  in the File menu 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.io.File;
import java.io.IOException;
import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.KeyStroke;

import org.fife.io.UnicodeReader;


/**
 * Action used by an <code>RText</code> to open a file selected from the "file history"
 * in the <code>RText</code>'s File menu.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class OpenFileFromHistoryAction extends AbstractAction {

	private RText owner;
	private String fileFullPath;


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


	/**
	 * Creates a new <code>OpenFileFromHistoryAction</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.
	 * @param owner the main window of this rtext instance.
	 * @param fileFullPath The name and path of the file to be opened.
	 */
	 public OpenFileFromHistoryAction(String text, ImageIcon icon, String desc,
	 		Integer mnemonic, KeyStroke accelerator, RText owner,
	 		String fileFullPath) {

		// Initialize properties for this action.
		super(text, icon);
		putValue(SHORT_DESCRIPTION, desc);
		putValue(ACCELERATOR_KEY, accelerator);
		putValue(MNEMONIC_KEY, mnemonic);
		this.owner = owner;
		this.fileFullPath = fileFullPath;

	}


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


	// Callback routine called when user uses this component.
	public void actionPerformed(ActionEvent e) {

		// To save on pointer references.
		AbstractMainView mainView = owner.getMainView();
		RTextEditorPane textArea = mainView.currentTextArea;

		// If the only document open is untitled and empty, remove
		// (and thus replace) it.
		if (mainView.getNumDocuments()==1 &&
			textArea.getFileName().equals(owner.getNewFileName()) &&
			textArea.getText().equals(""))
				mainView.closeCurrentDocument();

		// Attempt to add the old text file.
		try {

			// Make a best-guess at the file's encoding here.
			UnicodeReader reader = new UnicodeReader(
								new File(fileFullPath));
			String encoding = reader.getEncoding();
			reader.close();

			mainView.addOldTextFile(fileFullPath, encoding);
			mainView.moveToTopOfCurrentDocument();

		} catch (IOException ioe) {
			owner.displayException(ioe);
		}

	}


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

}