/*
 * Make_Get_and_Set_Methods.bsh - a BeanShell macro for
 * the jEdit text editor - facilitates the creation of
 * get() and set() methods from instance variables
 * Copyright (C) 2001 John Gellene
 * jgellene@nyc.rr.com
 * http://community.jedit.org
 *
 * based on code contributed to the jEdit Macro Guide project
 * by Seppo Silaste
 *
 * 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: Make_Get_and_Set_Methods.bsh 3872 2001-11-06 17:28:22Z jgellene $
 *
 * Notes on use:
 *
 * This macro works by grabbing text on the caret line of the text area
 * and parsing it to get the first two tokens that are not contained
 * in the macro's global string variable 'modifiers'.  It then constructs
 * a simple get() or set() method from the parsing results, depending
 * on which button you push.  You will probably generate nonsense if you
 * parse a line that does not begin with an instance variable.
 *
 * The results can be edited in the two text area in the dialog.  Pressing
 * either of the 'Insert' buttons will cause the contents of the corresponding
 * text area to be pasted into the current buffer.
 *
 * The method parseLine() uses and returns a scripted object 'resultObject()'
 * to pass the results of the parsing operation.  The absence of an explicit
 * return type in the proptotype of parseLine() is necessary to permit this.
 *
 * If the current buffer's edit mode is Java, the macro will parse Java
 * instance variables. Otherwise, the macro will parse C++ variables and
 * write C++ methods (with an equal potential for writing nonsense if an data
 * member is not being grabbed).
 *
 * Checked for jEdit 4.0 API
 *
 */

import javax.swing.border.*;

void makeGetSetDialog()
{
    title = "Make get and set methods from caret line text";

    dialog = new JDialog(view, title, false);
    content = new JPanel(new BorderLayout());
    content.setBorder(new EmptyBorder(5, 10, 10, 10));
    content.setPreferredSize(new Dimension(480, 320));
    dialog.setContentPane(content);

    // textPanel holds a getPanel and a setPanel; each of
    // the child panels holds a label and a scrolling text area
    textPanel = new JPanel(new GridLayout(2, 1, 0, 10));
    textPanel.setBorder(new EmptyBorder(5, 5, 5, 5));

    setPanel = new JPanel(new BorderLayout());
    setLabel = new JLabel("set() methods", SwingConstants.LEFT);
    setText = new JTextArea();
    setPanel.add(setLabel, "North");
    setPanel.add(new JScrollPane( setText), "Center");
    textPanel.add(setPanel);

    getPanel = new JPanel(new BorderLayout());
    getLabel = new JLabel("get() methods", SwingConstants.LEFT);
    getText = new JTextArea();
    getPanel.add(getLabel, "North");
    getPanel.add(new JScrollPane( getText), "Center");
    textPanel.add(getPanel);

    content.add(textPanel, "Center");


    buttonPanel = new JPanel(new GridLayout(5, 1, 0, 30));
    buttonPanel.setBorder( new EmptyBorder(22, 5, 5, 5));

    makeSetButton = new JButton("Make Set");
    insertSetButton = new JButton("Insert Set");
    doneButton = new JButton("Done");
    insertGetButton = new JButton("Insert Get");
    makeGetButton = new JButton("Make Get");

    buttonPanel.add(makeSetButton);
    buttonPanel.add(insertSetButton);
    buttonPanel.add(doneButton);
    buttonPanel.add(makeGetButton);
    buttonPanel.add(insertGetButton);

    content.add(buttonPanel, "East");

    // action listener for buttons

    makeSetButton.addActionListener(this);
    insertSetButton.addActionListener(this);
    doneButton.addActionListener(this);
    insertGetButton.addActionListener(this);
    makeGetButton.addActionListener(this);


    actionPerformed(e)
    {
        cmd = e.getActionCommand();
        if(cmd.indexOf("Done") != -1)
        {
            this.dialog.dispose();
            return;
        }
        isGetCmd = (cmd.indexOf("Get") != -1);
        if(cmd.indexOf("Insert") != -1)
            doInsert(isGetCmd ? this.getText : this.setText);
        else if(isGetCmd)
            doMakeGet(this.getText);
        else
            doMakeSet(this.setText);
    }


    dialog.pack();
    dialog.setLocationRelativeTo(view);
    dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
    dialog.setVisible(true);
}

void doMakeSet(JTextArea setText)
{
    result = parseLine();
    if(result.variable.length() == 0) return;
    c = result.variable.substring(0,1);
    c = c.toUpperCase();
    sb = new StringBuffer();
    if(USE_JAVA == true)
        sb.append("public ");
    else
    {
        sb.append("/* header:\nvoid set");
        sb.append(c);
        sb.append(result.variable.substring(1));
        sb.append("(");
        sb.append(result.type);
        sb.append(" ");
        sb.append(result.variable);
        sb.append("Param");
        sb.append(");\n*/\n");
    }
    sb.append("void set");
    sb.append(c);
    sb.append(result.variable.substring(1));
    sb.append("(");
    sb.append(result.type);
    sb.append(" ");
    sb.append(result.variable);
    if(USE_JAVA == false)
        sb.append("Param");
    sb.append(") {\n\t");
    if(USE_JAVA == true)
        sb.append("this.");
    sb.append(result.variable);
    sb.append(" = ");
    sb.append(result.variable);
    if(USE_JAVA == false)
        sb.append("Param");
    sb.append(";\n}\n");
    setText.append(sb.toString());
}



void doMakeGet(JTextArea getText)
{
    result = parseLine();
    if(result.variable.length() == 0) return;
    c = result.variable.substring(0,1);
    c = c.toUpperCase();
    sb = new StringBuffer();
    if(USE_JAVA == true)
        sb.append("public ");
    else
    {
        sb.append("/* header:\n");
        sb.append(result.type);
        sb.append(" get");
        sb.append(c);
        sb.append(result.variable.substring(1));
        sb.append("() const;\n*/\n");
    }

    sb.append(result.type);
    sb.append(" get");
    sb.append(c);
    sb.append(result.variable.substring(1));
    sb.append("()");
    if(USE_JAVA == false)
        sb.append(" const");
    sb.append(" {\n\treturn ");
    sb.append(result.variable);
    sb.append(";\n}\n");
    getText.append(sb.toString());
}

parseLine()
{
    // scripted object stores result of parsing
    resultObject( t, v)
    {
        type = t;
        variable = v;
        return this;
    }
    line = mainTextArea.getLineText(mainTextArea.getCaretLine()).trim();
    if(!(line == null || line.equals("")))
    {
        tokenizer = new StringTokenizer(line);
        if(tokenizer.countTokens() >= 2)
        {
            // get the first non-modifier token if there is one
            returnType = tokenizer.nextToken();
            if(USE_JAVA)
            {
                while( modifiers.indexOf(returnType) != -1
                        && tokenizer.hasMoreTokens())
                        returnType = tokenizer.nextToken();
            }

            if(tokenizer.hasMoreTokens())
            {
                // a non-modifier token was found and
                // there is also an instance variable.
                instanceVar = tokenizer.nextToken();
                // remove the ; if there is one
                if(instanceVar.endsWith(";"))
                instanceVar =
                instanceVar.substring(0, instanceVar.length() - 1);
                // if the code doesn't have a space between the instance
                // variable and the possible '=';
                // get the correct instance variable.
                if(instanceVar.indexOf('=') != -1)
                    instanceVar =
                        instanceVar.substring(0, instanceVar.indexOf('='));
                return resultObject( returnType, instanceVar);
            }
        }
    }
    Macros.message(mainView, "Nothing to parse");
    return resultObject( "", "");
}



void doInsert(JTextArea insertText)
{
    insert = insertText.getText();
    if(insert != null)
        mainTextArea.setSelectedText(insert);
}



// main routine

// setting USE_JAVA to false will cause the macro to be suitable
// for reading and writing C++ source code
USE_JAVA = buffer.getMode().getName().equals("java");
modifiers = "public protected private static transient final //";
if(USE_JAVA == false)
    modifiers = "//";

// external global variables imported by jEdit are
// not visible in methods called by ActionListener
mainTextArea = textArea;
mainView = view;

makeGetSetDialog();

/*
	Macro index data (in DocBook format)

<listitem>
    <para><filename>Make_Get_and_Set_Methods.bsh</filename></para>
    <abstract><para>
        Creates <function>getXXX()</function> or <function>setXXX()</function>
        methods that can be pasted into the buffer text.
    </para></abstract>
    <para>
        This macro presents a dialog that will <quote>grab</quote> the names
        of instance variables from the caret line of the current buffer
        and paste a corresponding <function>getXXX()</function> or
        <function>setXXX()</function> method to one of two text areas in the
        dialog.  The text can be edited in the dialog and then pasted into the
        current buffer using the <guilabel>Insert...</guilabel> buttons.  If
        the caret is set to a line containing something other than an instance
        variable, the text grabbing routine is likely to generate nonsense.
    </para>
    <para>
        As explained in the notes accompanying the source code, the macro
        uses a global variable which can be set to configure the macro to work
        with either Java or C++ code.  When set for use with C++ code,
        the macro will also write (in commented text) definitions of
        <function>getXXX()</function> or <function>setXXX()</function>
        suitable for inclusion in a header file.
    </para>
</listitem>

*/

// end Make_Get_and_Set_Methods.bsh