gui_layout_engine.h

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#pragma once
 
namespace tachyon
{
 
    class ScrollManagement;
    class ElementStorage;
    class OSWindowManager;
    class ITextSystem;

    class LayoutEngine
    {
    public:
        explicit LayoutEngine(ITextSystem& textSystem, 
                              ScrollManagement& scrollManagement) noexcept
            : m_textSystem(textSystem)
            , m_scrollManagement(scrollManagement)
        {
        }        

        void Layout(OSWindowManager& osWindowManager, ElementStorage& storage);
 
    private:
        ITextSystem& m_textSystem;
        ScrollManagement& m_scrollManagement;
        
        void HorizontalSizingPass(ElementStorage& storage);
        void VerticalSizingPass(ElementStorage& storage);
        void HorizontalPositioningPass(OSWindowManager& osWindowManager, ElementStorage& storage);
        void VerticalPositioningPass(OSWindowManager& osWindowManager, ElementStorage& storage);
    };

}