/**
    ToggleHeaderSource.bsh
    by Alan Ezust
    $Id: Toggle_Header_Source.bsh 5315 2005-12-22 19:05:20Z ezust $
    alan dot ezust at gmail dot com
    2005-11-09
   
    A jedit beanshell macro that toggles your current buffer
    between the header file (.h) and the source file (.c(pp|xx)?).

    Enables you to switch the current text
    buffer between C/C++ header and sourcecode
    file. If the file does not already exist, it opens a buffer
    of that name for you (!).

   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 the jEdit program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */

String defaultSourceExtension = "cpp";  

String[] sourceExtensions = new String[]{"cpp", "c", "cxx" };

String getSourceFile(String baseName)
{
    int numExt = sourceExtensions.length;
    for (int i=numExt-1; i>=0; --i) 
    {
        String ext = sourceExtensions[i];
        String tryFile = baseName + "." + ext;
        File f = new File(tryFile);
        if (f.canRead()) return f.getPath();
    }              
    return baseName + "." + defaultSourceExtension;
}

boolean isSourceFile(String extension) 
{
    for (int i=0; i<sourceExtensions.length; ++i) {
        if (extension.equals(sourceExtensions[i])) return true;
    }
    return false;
}

void toggleHeaderSource()
{

    String currentFile = buffer.getPath();
    int pos = currentFile.lastIndexOf('.');
    String extension = currentFile.substring(pos+1);
    String baseName = currentFile.substring(0, pos);
    if (isSourceFile(extension)) 
    {
        jEdit.openFile(view, baseName + ".h"); 
    }
    else if (extension.equals("h")) {
        String sourceFile = getSourceFile(baseName);
        jEdit.openFile(view, sourceFile);         
    }
}

toggleHeaderSource();