replacenextaction.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * ReplaceNextAction.java - Action in RText to replace text with new text.
 * 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 org.fife.ui.search.FindDialog;
import org.fife.ui.search.ReplaceDialog;


/**
 * Action used by an <code>AbstractMainView</code> to replace text with new text.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class ReplaceNextAction extends AbstractAction {

	private RText rtext;


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


	/**
	 * Creates a new <code>ReplaceNextAction</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 rtext The <code>RText</code> that owns the
	 *              <code>ReplaceDialog</code>.
	 */
	public ReplaceNextAction(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;
	}


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


	/**
	 * Callback routine called when user uses this component.
	 *
	 * @param e The action event.
	 */
	public void actionPerformed(ActionEvent e) {

		AbstractMainView mainView = rtext.getMainView();

		// Allocate find/replace dialogs the first time either is used, so
		// RText's initial startup time isn't as bad.
		if (mainView.replaceDialog==null) {
			mainView.findDialog = new FindDialog(rtext, mainView);
			mainView.replaceDialog = new ReplaceDialog(rtext, mainView);
			mainView.findDialog.addActionListener(mainView);
			mainView.replaceDialog.addActionListener(mainView);
			mainView.findDialog.addPropertyChangeListener(mainView);
			mainView.replaceDialog.addPropertyChangeListener(mainView);
		}

		// Do this just once for performance.
		ReplaceDialog replaceDialog = mainView.replaceDialog;

		// If it's nothing (ie, they haven't searched yet), bring up the
		// Replace dialog.
		if (mainView.searchStrings.size()==0 && !replaceDialog.isVisible()
				&& !mainView.findDialog.isVisible()) {
			replaceDialog.setSearchParameters(mainView.searchStrings,
									mainView.searchMatchCase,
									mainView.searchWholeWord,
									mainView.searchRegExpression,
									!mainView.searchingForward,
									mainView.searchMarkAll);
			replaceDialog.setVisible(true);
		}

		// Otherwise, repeat the last Replace action.
		else {

			RTextEditorPane textArea = mainView.currentTextArea;
			String searchString = "";

			// Get the text to search for.
			if (replaceDialog.isVisible()) {
				mainView.searchStrings = replaceDialog.getSearchStrings();
				searchString = replaceDialog.getSearchString();
			}
			// Otherwise, mainView.searchStrings already has a value, but we
			// still need to give a value to searchString.
			else {
				searchString = (String)mainView.searchStrings.get(0);
			}

			// Make the caret position be the earlier of the dot and the
			// mark (so we effectively search within the current selection as
			// well; so that if they click "Find", then "Replace" in the
			// Replace dialog, we replace the selected text).
			int start = textArea.getSelectionStart();
			textArea.setCaretPosition(start);

			boolean found = textArea.find(searchString,
									mainView.searchingForward,
									mainView.searchMatchCase,
									mainView.searchWholeWord,
									mainView.searchRegExpression);
			if (found) {
				textArea.replaceSelection(replaceDialog.getReplaceString());
				textArea.getCaret().setVisible(true);
			}
			else { // Not found.
				ResourceBundle msg = rtext.getResourceBundle();
				String escapedSearchString = RTextUtilities.
						getRegularExpressionForLine(searchString, true);
				String temp = msg.getString("CannotFindString").
							replaceFirst("%text%", escapedSearchString);
				JOptionPane.showMessageDialog(null, temp,
							msg.getString("InfoDialogHeader"),
							JOptionPane.INFORMATION_MESSAGE);
			}

			// If find and replace dialogs aren't up, give text area focus.
			if (!mainView.findDialog.isVisible() &&
					!replaceDialog.isVisible())
				textArea.requestFocusInWindow();

		}

	}


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

}