/*
 * Include_Guard.bsh - a BeanShell macro script for the
 * jEdit text editor - for C/C++ header files: inserts preprocessor
 * directive in current buffer to ensure that header is included only
 * once per compilation unit
 * 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 the jEdit program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id: Include_Guard.bsh 10301 2007-08-03 20:18:54Z blueyed $
 *
 * Notes on use:
 *
 * An "include guard" is a conventional mechanism for reducing
 * compilation time for C/C++ source files by ensuring that the
 * substance of a header file is read by the preprocessor only once
 * for each compilation unit.  The usual reason this is necessary is
 * the presence of nested include files, sometimes an unavoidable
 * circumstance when creating a hierarchy of classes.
 *
 * To use the macro, first place the caret at the beginning of the header
 * file before any uncommented text.  The macro returns to this position
 * upon completion.
 *
 * The macro will complain if you have not yet named the buffer, but it
 * does not check to see if the buffer is actually a header file.
 *
 * The defined term that triggers the guard is taken from the buffer's
 * name. This is one conventional approach and should not cause a conflict
 * unless a compilation unit includes header files from different
 * directories with the same name.  In that case, change the conflicting
 * guard names manually.
 *
 *
 * Checked for jEdit 4.0 API
 *
 */

void includeGuard()
{
    if(buffer.isUntitled())
    {
        Macros.error(view, "Name the file before inserting an include guard.");
        return;
    }

    guardName = buffer.getName().toUpperCase().replace('.', '_') ;
    pos = textArea.getCaretPosition();
    textArea.setCaretPosition(0);
    textArea.setSelectedText("#ifndef " + guardName + "\n#define " + guardName + "\n\n");
    pos1 = textArea.getCaretPosition();
    textArea.setCaretPosition(buffer.getLength());
    textArea.setSelectedText("\n#endif        //  #ifndef " + guardName + "\n");
    textArea.setCaretPosition(pos + pos1);
}

if( buffer.isReadOnly() ) 
    Macros.error(view, "Buffer is read-only.");
else 
    includeGuard();
