DataIO.hpp

//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2026 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
#ifndef TGUI_DATA_IO_HPP
#define TGUI_DATA_IO_HPP

 
#include <TGUI/String.hpp>
 
#include <cstdio>
#include <map>
#include <memory>
#include <sstream>
#include <string>
#include <vector>

 
namespace tgui
{
    class TGUI_API DataIO
    {
    public:
        struct ValueNode;

        struct Node
        {
            Node() = default;
            Node(Node&&) = default;
            Node& operator=(const Node&) = delete; // Not implemented because current code has no use for it
            Node& operator=(Node&&) = default;
 
            Node(const Node& other) :
                parent{other.parent},
                children{},
                propertyValuePairs{},
                name{other.name}
            {
                children.reserve(other.children.size());
                for (const auto& child : other.children)
                    children.push_back(std::make_unique<Node>(*child));
                for (const auto& pair : other.propertyValuePairs)
                    propertyValuePairs[pair.first] = std::make_unique<ValueNode>(*pair.second);
            }
 
            Node* parent = nullptr;
            std::vector<std::unique_ptr<Node>> children;
            std::map<String, std::unique_ptr<ValueNode>> propertyValuePairs;
            String name;
        };

        struct ValueNode
        {
            ValueNode(String v = U"") :
                value(std::move(v))
            {
            }
 
            String value;
            bool listNode = false;
            std::vector<String> valueList;
        };

        [[nodiscard]] static std::unique_ptr<Node> parse(std::stringstream& stream);

        static void emit(const std::unique_ptr<Node>& rootNode, std::stringstream& stream);
    };
} // namespace tgui
 
#endif // TGUI_DATA_IO_HPP