node-observer.h

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// SPDX-License-Identifier: GPL-2.0-or-later
 * Authors:
 *   MenTaLguY <mental@rydia.net>
 *   Krzysztof Kosiński <tweenk.pl@gmail.com> (documentation)
 * 
 * Copyright (C) 2018 Authors
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
#ifndef SEEN_INKSCAPE_XML_NODE_OBSERVER_H
#define SEEN_INKSCAPE_XML_NODE_OBSERVER_H
 
#include "util/share.h"
typedef unsigned int GQuark;
 
#ifndef INK_UNUSED
#define INK_UNUSED(x) ((void)(x))
#endif // INK_UNUSED
 
namespace Inkscape {
namespace XML {
 
class Node;
 
class NodeObserver {
protected:
    /* the constructor is protected to prevent instantiation */
    NodeObserver() = default;
public:
    virtual ~NodeObserver() = default;
 
    // FIXME: somebody needs to learn what "pure virtual" means
 
    virtual void notifyChildAdded(Node &node, Node &child, Node *prev) {
        INK_UNUSED(node);
        INK_UNUSED(child);
        INK_UNUSED(prev);
    }
 
    virtual void notifyChildRemoved(Node &node, Node &child, Node *prev) {
        INK_UNUSED(node);
        INK_UNUSED(child);
        INK_UNUSED(prev);
    }
 
    virtual void notifyChildOrderChanged(Node &node, Node &child,
                                         Node *old_prev, Node *new_prev) {
        INK_UNUSED(node);
        INK_UNUSED(child);
        INK_UNUSED(old_prev);
        INK_UNUSED(new_prev);
    }
 
    virtual void notifyContentChanged(Node &node,
                                      Util::ptr_shared old_content,
                                      Util::ptr_shared new_content) {
        INK_UNUSED(node);
        INK_UNUSED(old_content);
        INK_UNUSED(new_content);
    }
 
    virtual void notifyAttributeChanged(Node &node, GQuark name,
                                        Util::ptr_shared old_value,
                                        Util::ptr_shared new_value) {
        INK_UNUSED(node);
        INK_UNUSED(name);
        INK_UNUSED(old_value);
        INK_UNUSED(new_value);
    }
 
    virtual void notifyElementNameChanged(Node& node, GQuark old_name, GQuark new_name) {
        INK_UNUSED(node);
        INK_UNUSED(old_name);
        INK_UNUSED(new_name);
    }
 
};
 
} // namespace XML
} // namespace Inkscape
 
#endif
/*
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  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :