add_prefix_and_suffix.bsh

用java 编写的源码开放的文本编辑器。有很多有用的特性

/*
 * Add_Prefix_and_Suffix.bsh - a BeanShell macro script for the
 * jEdit text editor - obtains and processes input for prefix and
 * suffix text to be inserted in selected lines in the current
 * editing buffer
 * Copyright (C) 2001 John Gellene
 * [e-mail]
 * http://community.jedit.org
 *
 * 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.
 *
 * $Id: Add_Prefix_and_Suffix.bsh,v 1.8 2002/11/21 23:08:37 spestov Exp $
 *
 * Notes on use:
 *
 * If no text is selected, the macro will operate on the current line.
 *
 * The caret position is part of the selected text; if the caret is at
 * the beginning of a line, the macro will operate on that line.
 *
 * The use of HistoryTextField objects allows the macro to 'remember'
 * past entries for the prefix and suffix.
 *
 * Checked for jEdit 4.0 API
 *
 */

// beginning of Add_suffix_and_prefix.bsh

// import statements
import javax.swing.border.*;

// main routine
void prefixSuffixDialog()
{
    // create dialog object and set its features
    title = "Add prefix and suffix to selected lines";
    dialog = new JDialog(view, title, false);
    content = new JPanel(new BorderLayout());
    content.setBorder(new EmptyBorder(12, 12, 12, 12));
    dialog.setContentPane(content);

    // add to the dialog a panel containing the text fields for
    // entry of the prefix and suffix text
    fieldPanel = new JPanel(new GridLayout(4, 1, 0, 6));
    prefixField = new HistoryTextField("macro.add-prefix");
    prefixLabel = new JLabel("Prefix to add:");
    suffixField = new HistoryTextField("macro.add-suffix");
    suffixLabel = new JLabel("Suffix to add:");
    fieldPanel.add(prefixLabel);
    fieldPanel.add(prefixField);
    fieldPanel.add(suffixLabel);
    fieldPanel.add(suffixField);
    content.add(fieldPanel, "Center");

    // add a panel containing the buttons
    buttonPanel = new JPanel();
    buttonPanel.setLayout(new BoxLayout(buttonPanel,
        BoxLayout.X_AXIS));
    buttonPanel.setBorder(new EmptyBorder(12, 50, 0, 50));
    buttonPanel.add(Box.createGlue());
    ok = new JButton("OK");
    cancel = new JButton("Cancel");
    ok.setPreferredSize(cancel.getPreferredSize());
    dialog.getRootPane().setDefaultButton(ok);
    buttonPanel.add(ok);
    buttonPanel.add(Box.createHorizontalStrut(6));
    buttonPanel.add(cancel);
    buttonPanel.add(Box.createGlue());
    content.add(buttonPanel, "South");

    // register this method as an ActionListener for
    // the buttons and text fields
    ok.addActionListener(this);
    cancel.addActionListener(this);
    prefixField.addActionListener(this);
    suffixField.addActionListener(this);

    // locate the dialog in the center of the
    // editing pane and make it visible
    dialog.pack();
    dialog.setLocationRelativeTo(view);
    dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
    dialog.setVisible(true);

    // this method will be called when a button is clicked
    // or when ENTER is pressed
    void actionPerformed(e)
    {
        if(e.getSource() != cancel)
        {
            processText();
        }
        dialog.dispose();
    }

    // this is where the work gets done to insert
    // the prefix and suffix
    void processText()
    {
        prefix = prefixField.getText();
        suffix = suffixField.getText();
        if(prefix.length() == 0 && suffix.length() == 0)
            return;
        prefixField.addCurrentToHistory();
        suffixField.addCurrentToHistory();

        // text manipulation begins here using calls
        // to jEdit methods
        buffer.beginCompoundEdit();
        selectedLines = textArea.getSelectedLines();
        for(i = 0; i < selectedLines.length; ++i)
        {
            offsetBOL = textArea.getLineStartOffset(selectedLines[i]);
            textArea.setCaretPosition(offsetBOL);
            textArea.goToStartOfWhiteSpace(false);
            textArea.goToEndOfWhiteSpace(true);
            text = textArea.getSelectedText();
            if(text == null) text = "";
            textArea.setSelectedText(prefix + text + suffix);
        }
        buffer.endCompoundEdit();
    }
}

// this single line of code is the script's main routine
// it calls the methods and exits
prefixSuffixDialog();

/*
	Macro index data (in DocBook format)

<listitem>
    <para><filename>Add_Prefix_and_Suffix.bsh</filename></para>
    <abstract><para>
        Adds user-supplied <quote>prefix</quote> and <quote>suffix</quote>
        text to each line in a group of selected lines.
    </para></abstract>
    <para>
        Text is added after leading whitespace and before trailing whitespace.
        A dialog window receives input and <quote>remembers</quote> past entries.
    </para>
</listitem>

*/

// end Add_Prefix_and_Suffix.bsh