#include <Menu.h>

namespace Menu {

const Item_t NullItem PROGMEM = { (const Menu::Item_s *)NULL, (const Menu::Item_s *)NULL, (const Menu::Item_s *)NULL, (const Menu::Item_s *)NULL, (const Menu::Callback_t)NULL, (const char *)NULL };

Engine::Engine()

: currentItem(&Menu::NullItem), previousItem(&Menu::NullItem), lastInvokedItem(&Menu::NullItem)

{

}

Engine::Engine(const Item_t *initialItem)

: currentItem(initialItem), previousItem(&Menu::NullItem), lastInvokedItem(&Menu::NullItem)

{

}

const char * Engine::getLabel(const Item_t * item) const {

return (const char *)pgm_read_word((item == NULL) ? &currentItem->Label : &item->Label);

}

const Item_t * Engine::getPrev(const Item_t * item) const {

return (const Item_t *)pgm_read_word((item == NULL) ? &currentItem->Previous : &item->Previous);

}

const Item_t * Engine::getNext(const Item_t * item) const {

return (const Item_t *)pgm_read_word((item == NULL) ? &currentItem->Next : &item->Next);

}

const Item_t * Engine::getParent(const Item_t * item) const {

return (const Item_t *)pgm_read_word((item == NULL) ? &currentItem->Parent : &item->Parent);

}

const Item_t * Engine::getChild(const Item_t * item) const {

return (const Item_t *)pgm_read_word((item == NULL) ? &currentItem->Child : &item->Child);

}

void Engine::navigate(const Item_t * targetItem) {

}

void Engine::invoke(void) {

}

bool Engine::executeCallbackAction(const Action_t action) const {

}

Info_t Engine::getItemInfo(const Item_t * item) const {

}

void Engine::render(const RenderCallback_t render, uint8_t maxDisplayedMenuItems) const {

}

}; // end namespace