sp-tref-reference.h

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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_SP_TREF_REFERENCE_H
#define SEEN_SP_TREF_REFERENCE_H
 
/*
 * The reference corresponding to href of <tref> element.
 *
 * This file was created based on sp-use-reference.h
 *
 * Copyright (C) 2007 Gail Banaszkiewicz
 *   Abhishek Sharma
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
#include <cstddef>
#include <memory>
#include <sigc++/sigc++.h>
 
#include "sp-item.h"
#include "uri-references.h"
 
#include "util/share.h"
#include "xml/node-observer.h"
#include "xml/subtree.h"
 
typedef unsigned int GQuark;
 
class SPTRefReference : public Inkscape::URIReference,
                        public Inkscape::XML::NodeObserver {
public:
    SPTRefReference(SPObject *owner) : URIReference(owner) {
        updateObserver();
    }
    
    ~SPTRefReference() override {
        if (subtreeObserved) {
            subtreeObserved->removeObserver(*this);
        }   
    }
 
    SPItem *getObject() const {
        return static_cast<SPItem *>(URIReference::getObject());
    }
   
    void updateObserver();
    
    // Node Observer Functions
    void notifyChildAdded(Inkscape::XML::Node &node, Inkscape::XML::Node &child, Inkscape::XML::Node *prev) override;
    void notifyChildRemoved(Inkscape::XML::Node &node, Inkscape::XML::Node &child, Inkscape::XML::Node *prev) override;
    void notifyChildOrderChanged(Inkscape::XML::Node &node, Inkscape::XML::Node &child,
                                 Inkscape::XML::Node *old_prev, Inkscape::XML::Node *new_prev) override;
    void notifyContentChanged(Inkscape::XML::Node &node,
                              Inkscape::Util::ptr_shared old_content,
                              Inkscape::Util::ptr_shared new_content) override;
    void notifyAttributeChanged(Inkscape::XML::Node &node, GQuark name,
                                Inkscape::Util::ptr_shared old_value,
                                Inkscape::Util::ptr_shared new_value) override;
 
protected:
    bool _acceptObject(SPObject * obj) const override; 
    
    std::unique_ptr<Inkscape::XML::Subtree> subtreeObserved;
};
 
#endif // !SEEN_SP_TREF_REFERENCE_H
 
/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :