ladybird/Libraries/LibHTML/CSS/StyleProperties.h

#pragma once

#include <AK/HashMap.h>
#include <AK/NonnullRefPtr.h>
#include <LibDraw/Font.h>
#include <LibHTML/CSS/StyleValue.h>

class Color;

class StyleProperties : public RefCounted<StyleProperties> {
public:
    static NonnullRefPtr<StyleProperties> create() { return adopt(*new StyleProperties); }

    template<typename Callback>
    inline void for_each_property(Callback callback) const
    {
        for (auto& it : m_property_values)
            callback(it.key, *it.value);
    }

    void set_property(const String& name, NonnullRefPtr<StyleValue> value);
    Optional<NonnullRefPtr<StyleValue>> property(const String& name) const;

    Length length_or_fallback(const StringView& property_name, const Length& fallback) const;
    String string_or_fallback(const StringView& property_name, const StringView& fallback) const;
    Color color_or_fallback(const StringView& property_name, const Document&, Color fallback) const;

    const Font& font() const
    {
        if (!m_font)
            load_font();
        return *m_font;
    }

private:
    HashMap<String, NonnullRefPtr<StyleValue>> m_property_values;

    void load_font() const;

    mutable RefPtr<Font> m_font;
};