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/*
Copyright (C) 2008 Paul Davis
Author: Sakari Bergen
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
(at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_element_import_handler_h__
#define __ardour_element_import_handler_h__
#include <string>
#include <list>
#include <set>
#include <boost/shared_ptr.hpp>
#include "ardour/libardour_visibility.h"
#include "pbd/libpbd_visibility.h"
class XMLTree;
namespace ARDOUR {
class Session;
class ElementImporter;
/// Virtual interface class for element import handlers
class LIBARDOUR_API ElementImportHandler
{
public:
typedef boost::shared_ptr<ElementImporter> ElementPtr;
typedef std::list<ElementPtr> ElementList;
/** ElementImportHandler constructor
* The constructor should find everything from the XML Tree it can handle
* and create respective Elements stored in elements.
*
* @param source XML tree to be parsed
* @see elements
*/
ElementImportHandler (XMLTree const & source, ARDOUR::Session & session)
: source (source), session (session) { }
virtual ~ElementImportHandler ();
/** Gets a textual representation of the element type
* @return textual representation of element type
*/
virtual std::string get_info () const = 0;
/// Elements this handler handles
ElementList elements;
/* For checking duplicates names against queued elements */
/** Checks whether or not an element with some name is queued or not
* @param name name to check
* @return true if name is not used
*/
bool check_name (const std::string & name) const;
/// Adds name to the list of used names
void add_name (std::string name);
/// Removes name from the list of used names
void remove_name (const std::string & name);
/// Checks wheter or not all elements can be imported cleanly
static bool dirty () { return _dirty; }
/// Sets handler dirty
static void set_dirty () { _dirty = true; }
/// Checks wheter or not all elements were imported cleanly
static bool errors () { return _errors; }
/// Sets handler dirty
static void set_errors () { _errors = true; }
protected:
/// Source session XML tree
XMLTree const & source;
/// Destination session
ARDOUR::Session & session;
/// Session XML readability
static bool _dirty;
/// Errors post initialization
static bool _errors;
private:
/// Set of names for duplicate checking
std::set<std::string> names;
};
} // namespace ARDOUR
#endif
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