urimap.hpp

#ifndef LVTK_URIMAP_HPP
#define LVTK_URIMAP_HPP

#include <lv2/lv2plug.in/ns/ext/uri-map/uri-map.h>
#include <lvtk/private/types.hpp>

#warning "this header uses the deprecated lv2 extension uri-map. \
    please use URID instead."

namespace lvtk
{

    template<bool Required = true>
    struct URIMap
    {
        template<class Derived>
        struct I : Extension<Required>
        {

            I() :  m_callback_data(0), m_func(0)
            {
            }

            static void
            map_feature_handlers(FeatureHandlerMap& hmap)
            {
                hmap[LV2_URI_MAP_URI] = &I<Derived>::handle_feature;
            }

            static void
            handle_feature(void* instance, void* data)
            {
                Derived* d = reinterpret_cast<Derived*>(instance);
                I<Derived>* fe = static_cast<I<Derived>*>(d);
                LV2_URI_Map_Feature* umf =
                        reinterpret_cast<LV2_URI_Map_Feature*>(data);
                fe->m_callback_data = umf->callback_data;
                fe->m_func = umf->uri_to_id;
                fe->m_ok = (fe->m_func != 0);
            }

            bool
            check_ok()
            {
                if (LVTK_DEBUG)
                {
                    std::clog << "    [LV2::URIMap] Validation "
                            << (this->m_ok ? "succeeded" : "failed")
                            << "." << std::endl;
                }

                return this->m_ok;
            }

        protected:

            uint32_t
            uri_to_id(const char* map, const char* uri) const
            {
                if (LVTK_DEBUG)
                {
                    uint32_t result = m_func(m_callback_data, map, uri);
                    std::clog << "[LV2::URIMap] uri_to_id(\"" << uri
                            << "\") -> " << result << std::endl;
                    return result;
                }
                return m_func(m_callback_data, map, uri);
            }

            LV2_URI_Map_Callback_Data m_callback_data;
            uint32_t (*m_func)(LV2_URI_Map_Callback_Data, const char*, const char*);

        };
    };
} /* namespace lvtk */

#endif /* LVTK_URIMAP_HPP */