sp-style-elem.h

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// SPDX-License-Identifier: GPL-2.0-or-later
 * Authors: see git history
 *
 * Copyright (C) 2018 Authors
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
#ifndef INKSCAPE_SP_STYLE_ELEM_H
#define INKSCAPE_SP_STYLE_ELEM_H
 
#include <memory>
#include <vector>
#include "3rdparty/libcroco/src/cr-statement.h"
 
#include "media.h"
#include "sp-object.h"
 
#include "xml/node-observer.h"
 
class SPStyleElem;
 
class SPStyleElemNodeObserver : public Inkscape::XML::NodeObserver
{
    friend class SPStyleElem;
    ~SPStyleElemNodeObserver() override = default; // can only exist as a direct base of SPStyleElem
 
    void notifyChildAdded(Inkscape::XML::Node &, Inkscape::XML::Node &, Inkscape::XML::Node *) final;
    void notifyChildRemoved(Inkscape::XML::Node &, Inkscape::XML::Node &, Inkscape::XML::Node *) final;
    void notifyChildOrderChanged(Inkscape::XML::Node &, Inkscape::XML::Node &, Inkscape::XML::Node *, Inkscape::XML::Node *) final;
};
 
class SPStyleElemTextNodeObserver : public Inkscape::XML::NodeObserver
{
    friend class SPStyleElem;
    ~SPStyleElemTextNodeObserver() override = default; // can only exist as a direct base of SPStyleElem
 
    void notifyContentChanged(Inkscape::XML::Node &, Inkscape::Util::ptr_shared, Inkscape::Util::ptr_shared) final;
};
 
class SPStyleElem final
    : public SPObject
    , private SPStyleElemNodeObserver
    , private SPStyleElemTextNodeObserver
{
public:
    SPStyleElem();
    ~SPStyleElem() override;
    int tag() const override { return tag_of<decltype(*this)>; }
 
    // Container for the libcroco style sheet instance created on load.
    CRStyleSheet *style_sheet{nullptr};
 
    Media media;
    bool is_css{false};
 
    std::vector<std::unique_ptr<SPStyle>> get_styles() const;
 
    void build(SPDocument *doc, Inkscape::XML::Node *repr) override;
    void set(SPAttr key, char const *value) override;
    void read_content() override;
    void release() override;
 
    Inkscape::XML::Node *write(Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, unsigned int flags) override;
 
private:
    SPStyleElemNodeObserver &nodeObserver() { return *this; }
    SPStyleElemTextNodeObserver &textNodeObserver() { return *this; }
 
    // for static_casts
    friend SPStyleElemNodeObserver;
    friend SPStyleElemTextNodeObserver;
};
 
#endif /* !INKSCAPE_SP_STYLE_ELEM_H */
 
/*
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  End:
*/
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