gui_registry.cpp

#include "lxgui/gui_registry.hpp"
 
#include "lxgui/gui_out.hpp"
#include "lxgui/gui_region.hpp"
#include "lxgui/utils_string.hpp"
 
namespace lxgui::gui {
 
bool registry::check_region_name(std::string_view name) const {
    if (utils::has_no_content(name)) {
        gui::out << gui::error << "gui::registry: "
                 << "Cannot create a region with a blank name." << std::endl;
        return false;
    }
 
    if (utils::is_number(name[0])) {
        gui::out << gui::error << "gui::registry: "
                 << "A region's name cannot start by a number: \"" << name << "\" is forbidden."
                 << std::endl;
        return false;
    }
 
    std::size_t pos = name.find("$");
    if (pos != name.npos && pos != 0) {
        gui::out << gui::error << "gui::registry: "
                 << "A region's name cannot contain the character '$' except at the begining: \""
                 << name << "\" is forbidden." << std::endl;
        return false;
    }
 
    for (auto c : name) {
        if ((std::isalnum(c) == 0) && c != '_' && c != '$') {
            gui::out << gui::error << "gui::registry: "
                     << "A region's name can only contain alphanumeric symbols, or underscores: \""
                     << name << "\" is forbidden." << std::endl;
            return false;
        }
    }
 
    return true;
}
 
bool registry::add_region(utils::observer_ptr<region> obj) {
    if (!obj) {
        gui::out << gui::error << "gui::registry: Adding a null region." << std::endl;
        return false;
    }
 
    auto iter_named_obj = named_object_list_.find(obj->get_name());
    if (iter_named_obj != named_object_list_.end()) {
        gui::out << gui::warning << "gui::registry: "
                 << "A region with the name \"" << obj->get_name() << "\" already exists."
                 << std::endl;
        return false;
    }
 
    named_object_list_[obj->get_name()] = std::move(obj);
 
    return true;
}
 
void registry::remove_region(const region& obj) {
    named_object_list_.erase(obj.get_name());
}
 
utils::observer_ptr<const region> registry::get_region_by_name(std::string_view name) const {
    auto iter = named_object_list_.find(std::string{name});
    if (iter != named_object_list_.end())
        return iter->second;
    else
        return nullptr;
}
 
} // namespace lxgui::gui