track_property.h

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class NOVTABLE track_property_callback {
public:
    virtual void set_property(const char * p_group,double p_sortpriority,const char * p_name,const char * p_value) = 0;
protected:
    track_property_callback const & operator=(track_property_callback const &) {return *this;}
    ~track_property_callback() {}
};

class NOVTABLE track_property_callback_v2 : public track_property_callback {
public:
    virtual bool is_group_wanted(const char * p_group) = 0;
protected:
    ~track_property_callback_v2() {}
};

class NOVTABLE track_property_provider : public service_base {
public:
    virtual void enumerate_properties(metadb_handle_list_cref p_tracks, track_property_callback & p_out) = 0;
    virtual bool is_our_tech_info(const char * p_name) = 0;

    FB2K_MAKE_SERVICE_INTERFACE_ENTRYPOINT(track_property_provider);
};

class NOVTABLE track_property_provider_v2 : public track_property_provider {
    FB2K_MAKE_SERVICE_INTERFACE(track_property_provider_v2,track_property_provider)
public:
    virtual void enumerate_properties_v2(metadb_handle_list_cref p_tracks, track_property_callback_v2 & p_out) = 0;
};

class NOVTABLE track_property_provider_v3_info_source {
public:
    virtual metadb_info_container::ptr get_info(size_t index) = 0;
};

class track_property_provider_v3_info_source_impl : public track_property_provider_v3_info_source {
public:
    track_property_provider_v3_info_source_impl(metadb_handle_list_cref items) : m_items(items) {}
    metadb_info_container::ptr get_info(size_t index) {return m_items[index]->get_info_ref();}
private:
    metadb_handle_list_cref m_items;
};

class track_property_callback_v2_proxy : public track_property_callback_v2 {
public:
    track_property_callback_v2_proxy(track_property_callback & callback) : m_callback(callback) {}
    void set_property(const char * p_group,double p_sortpriority,const char * p_name,const char * p_value) {m_callback.set_property(p_group, p_sortpriority, p_name, p_value);}
    bool is_group_wanted(const char*) {return true;}

private:
    track_property_callback & m_callback;
};

class NOVTABLE track_property_provider_v3 : public track_property_provider_v2 {
    FB2K_MAKE_SERVICE_INTERFACE(track_property_provider_v3,track_property_provider_v2)
public:
    virtual void enumerate_properties_v3(metadb_handle_list_cref items, track_property_provider_v3_info_source & info, track_property_callback_v2 & callback) = 0;  

    void enumerate_properties(metadb_handle_list_cref p_tracks, track_property_callback & p_out) {track_property_provider_v3_info_source_impl src(p_tracks); track_property_callback_v2_proxy cb(p_out); enumerate_properties_v3(p_tracks, src, cb);}
    void enumerate_properties_v2(metadb_handle_list_cref p_tracks, track_property_callback_v2 & p_out) {track_property_provider_v3_info_source_impl src(p_tracks); enumerate_properties_v3(p_tracks, src, p_out);}
};

template<typename T>
class track_property_provider_factory_t : public service_factory_single_t<T> {};