gui_style_sheet.h

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#pragma once
 
#include <gui_core/style/gui_style.h>
 
#include <string>
#include <string_view>
#include <unordered_map>
#include <vector>
 
namespace tachyon 
{
 
    // ============================================================================
    // StyleSheet - result of parsing a CSS-inspired style file
    // ============================================================================

    struct ParseError
    {
        std::string message;    
        int         line   = 0; 
        int         column = 0; 
    };

    struct CustomProperty
    {
        color4b    color {};         
        ColorStyle colorStyle {};    
        bool       hasColor = false; 

        uint16_t   dims[4] {};
        uint8_t    dimCount = 0; 
        float      number    = 0.0f; 
        bool       hasNumber = false; 

        BoxShadow  shadows[kMaxBoxShadows] {}; 
        bool       hasShadow = false; 
    };

    struct FontFace
    {
        std::string family; 
        std::string src; 
    };

    struct ChildStyles
    {
        Style first; 
        Style last;  
        Style only;  
    };

    struct StyleSheet
    {
        std::unordered_map<std::string, Style>          styles; 
        std::unordered_map<std::string, ChildStyles>    childStyles;
        std::unordered_map<std::string, CustomProperty> customProperties; 
        std::vector<FontFace>                           fontFaces; 
        Style                                           baseStyle; 
        std::vector<ParseError>                         errors; 

        bool                  HasErrors()                            const { return !errors.empty(); }
        const Style*          GetStyle(std::string_view name)          const;
        const CustomProperty* GetCustomProperty(std::string_view name) const;
    };

    StyleSheet ParseStyleSheet(std::string_view source);

} // namespace tachyon