/*
 * Get_Package_Name.bsh - a BeanShell macro script for the
 * jEdit text editor - insert package name based upon path
 * of current buffer
 * Copyright (C) 2001 John Gellene
 * jgellene@nyc.rr.com
 * 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.
 *
 * Based on code contributed by Richard Wan
 *
 * $Id: Get_Package_Name.bsh 3872 2001-11-06 17:28:22Z jgellene $
 *
 * Checked for jEdit 4.0 API
 *
 */

boolean testClassPath()
{
	classpath = System.getProperty("java.class.path");
	classSeparator = (File.separatorChar == '/' ? ':' : ';');
	return (classpath.indexOf(classSeparator) != -1)
		|| (!classpath.endsWith("jedit.jar"));
}


File getCanonicalFile(File file)
{
    try
    {
        return new File(file.getCanonicalPath());
    }
    catch(IOException e)
    {
        return new File(file.getAbsolutePath());
    }
}

File getRoot(File file)
{
    tokens = new StringTokenizer(System.getProperty("java.class.path"),
        File.pathSeparator);
    fileSet = new Hashtable();
    while(tokens.hasMoreTokens())
	{
		String tok = tokens.nextToken();
        fileSet.put(getCanonicalFile(new File(tok)), tok);
	}

    while(file != null)
    {
        if(fileSet.get(getCanonicalFile(file)) != null)
            break;
        parent = file.getParent();
        file = (parent != null) ? new File(parent) : null;
    }
    return file;
}


String determinePackageName(String path)
{
    pathFile = new File(buffer.getPath());
    File root = getRoot(pathFile);
    if(root == null)
        return null;
    parent = pathFile.getParent();
    packagePath = parent.substring(root.getPath().length(), parent.length());
    packagePath = packagePath.replace(File.separatorChar, '.');
    if (packagePath.endsWith("."))
    {
        packagePath = packagePath.substring(0, packagePath.length() - 1);
    }
    if (packagePath.startsWith("."))
    {
        packagePath = packagePath.substring(1, packagePath.length());
    }
    return packagePath;
}

// main routine
if(!testClassPath())
{
	Macros.error(view, "This macro will not work when the Java interpreter\n"
		+ "loads jEdit with the '-jar' command line option.");
}
else
{
	result = determinePackageName(buffer.getPath());
	if(result == null)
	{
		Macros.error(view, "Could not find a package name.");
	}
	else textArea.setSelectedText(result);
}

/*
	Macro index data (in DocBook format)

<listitem>
    <para><filename>Get_Package_Name.bsh</filename></para>
    <abstract><para>
        Inserts a plausible Java package name for the current buffer.
    </para></abstract>
    <para>
        The macro compares the buffer's path name with the elements of the
        classpath being used by the jEdit session.  An error message will be
        displayed if no suitable package name is found. This macro will not
        work if jEdit is being run as a JAR file without specifying a
        classpath.  In that case the classpath seen by the macro consists
        solely of the JAR file.
    </para>
</listitem>

*/

// end Get_Package_Name.bsh