font-tags.h

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// SPDX-License-Identifier: GPL-2.0-or-later
 
#include <string>
#include <vector>
#include <unordered_map>
#include <set>
#include <pangomm.h>
 
namespace std {
    template<>
    struct hash<Glib::RefPtr<Pango::FontFace>> {
        ::std::size_t operator () (const Glib::RefPtr<Pango::FontFace>& face) const {
            return ::std::hash<void*>()(face.get());
        }
    };
}
 
namespace Inkscape {
 
struct FontTag {
    std::string tag;
    Glib::ustring display_name;
 
    bool operator == (const FontTag& ft) const { return tag == ft.tag && display_name == ft.display_name; }
};
 
class FontTags {
public:
    static FontTags& get();
 
    std::vector<FontTag> get_tags() const;
    void add_tag(const FontTag& tag);
 
    std::set<std::string> get_font_tags(Glib::RefPtr<Pango::FontFace>& face) const;
    void tag_font(Glib::RefPtr<Pango::FontFace>& face, std::string tag);
  
    const std::vector<FontTag>& get_selected_tags() const;
    bool select_tag(const std::string& tag_id, bool selected);
    bool is_tag_selected(const std::string& tag_id) const;
    bool deselect_all();
 
    const FontTag* find_tag(const std::string& tag_id) const;
 
    sigc::signal<void (const FontTag*, bool)>& get_signal_tag_changed();
 
private:
    FontTags();
    std::unordered_map<Glib::RefPtr<Pango::FontFace>, std::set<std::string>> _map;
    std::vector<FontTag> _tags;
    std::vector<FontTag> _selected;
    sigc::signal<void (const FontTag*, bool)> _signal_tag_changed;
};
 
} // namespace