findnextaction.java~1~

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * FindNextAction.java - Action to search for text again 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 org.fife.ui.search.FindDialog;
import org.fife.ui.search.ReplaceDialog;


/**
 * Action used by an <code>AbstractMainView</code> to search for text.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class FindNextAction extends AbstractAction {

	private RText rtext;


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


	/**
	 * Creates a new <code>FindNextAction</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>FindDialog</code>.
	 */
	public FindNextAction(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.findDialog==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.
		FindDialog findDialog = mainView.findDialog;

		// If the current text string is nothing (ie, they haven't searched
		// yet), bring up Find dialog.
		if (mainView.searchStrings.size()==0 && !findDialog.isVisible() &&
				!mainView.replaceDialog.isVisible()) {
			findDialog.setSearchParameters(mainView.searchStrings,
									mainView.searchMatchCase,
									mainView.searchWholeWord,
									mainView.searchRegExpression,
									!mainView.searchingForward,
									mainView.searchMarkAll);
			findDialog.setVisible(true);
		}
		// Otherwise, repeat the last Find action.
		else {

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

			// Get the text last searched for.
			if (findDialog.isVisible()) {
				mainView.searchStrings = findDialog.getSearchStrings();
				searchString = findDialog.getSearchString();
			}
			else if (mainView.replaceDialog.isVisible()) {
				ReplaceDialog replaceDialog = mainView.replaceDialog;
				mainView.searchStrings = replaceDialog.getSearchStrings();
				searchString = replaceDialog.getSearchString();
			}
			// else, mainView.searchStrings should already have a value (see
			// above), but we still need to give a value to searchString.
			else {
				searchString = (String)mainView.searchStrings.get(0);
			}

			// If "mark all" is selected, first mark all occurences in the
			// text area, then do the "find" (so that the next occurence is
			// indeed selected).
			textArea.clearMarkAllHighlights(); // Always remove old stuff.
			if (mainView.searchMarkAll) {
				textArea.markAll(searchString, mainView.searchMatchCase,
									mainView.searchWholeWord,
									mainView.searchRegExpression);
			}

			boolean found = textArea.find(searchString,
									mainView.searchingForward,
									mainView.searchMatchCase,
									mainView.searchWholeWord,
									mainView.searchRegExpression);
			if (!found) {
				ResourceBundle msg = rtext.getResourceBundle();
				// Double-up backslashes or String.replaceFirst() will get
				// rid of 'em...
				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 (!findDialog.isVisible() &&
					!mainView.replaceDialog.isVisible())
				textArea.requestFocusInWindow();

		}

	}


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

}