html_menu.hpp

/*********************************************************************/
// webdar - a web server and interface program to libdar
// Copyright (C) 2013-2025 Denis Corbin
//
// This file is part of Webdar
//
//  Webdar is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  Webdar is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with Webdar.  If not, see <http://www.gnu.org/licenses/>
//
//----
//  to contact the author: dar.linux@free.fr
/*********************************************************************/
 
#ifndef HTML_MENU_HPP
#define HTML_MENU_HPP
 
    // C system header files
#include "my_config.h"
extern "C"
{
 
}
 
    // C++ system header files
#include <map>
#include <deque>
 
    // webdar headers
#include "body_builder.hpp"
#include "html_button.hpp"
#include "html_div.hpp"
#include "events.hpp"
 
 
 
class html_menu : public html_div, protected events, protected actor
{
public:
    static const std::string changed;
 
    html_menu();
    html_menu(const html_menu & ref) = delete;
    html_menu(html_menu && ref) noexcept = delete;
    html_menu & operator = (const html_menu & ref) = delete;
    html_menu & operator = (html_menu && ref) noexcept = delete;
 
    ~html_menu();
 
    void add_entry(const std::string & label, const std::string & tag);
 
    unsigned int get_current_mode() const { return current_mode; };
 
    void set_current_mode(unsigned int mode, bool force = false);
 
    unsigned int get_previous_mode() const { return previous_mode; };
 
    std::string get_current_tag() const;
 
    void set_current_tag(const std::string & tag);
 
    std::string get_previous_tag() const;
 
    std::string get_current_label() const;
 
    void record_actor_on_event(actor *ptr) { events::record_actor_on_event(ptr, changed); };
 
    virtual void on_event(const std::string & event_name) override;
 
protected:
    virtual std::string inherited_get_body_part(const chemin & path,
                        const request & req) override;
 
    virtual void new_css_library_available() override;
 
private:
 
    struct cell
    {
    std::string itag;  
    html_button* ibtn; 
 
    cell(const std::string & label, const std::string & event_name, const std::string & tag)
    {
        ibtn = new (std::nothrow) html_button(label, event_name);
        if(ibtn == nullptr)
        throw exception_memory();
        itag = tag;
    };
    cell(const cell &) = delete; // not implemented (not needed)
    cell(cell && ref) noexcept { ibtn = nullptr; std::swap(ref.ibtn, ibtn); std::swap(ref.itag, itag); };
    cell & operator = (const cell &) = delete; // not implemented (not needed)
    cell & operator = (cell && ref) noexcept { std::swap(ref.ibtn, ibtn); std::swap(ref.itag, itag); return *this; };
    ~cell()
    {
        if(ibtn != nullptr)
        {
        delete ibtn;
        ibtn = nullptr;
        }
    };
    };
 
    unsigned int current_mode;  
    unsigned int previous_mode; 
    std::deque<cell> item;      
};
 
#endif