text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #pragma once
  
  #include <AK/HashMap.h>
  #include <AK/NonnullRefPtr.h>
  #include <LibGfx/Font.h>
  #include <LibGfx/Forward.h>
  #include <LibWeb/CSS/ComputedValues.h>
  #include <LibWeb/CSS/LengthBox.h>
  #include <LibWeb/CSS/StyleValue.h>
  
  namespace Web::CSS {
  
  class StyleProperties : public RefCounted<StyleProperties> {
  public:
      StyleProperties();
  
      explicit StyleProperties(const StyleProperties&);
  
      static NonnullRefPtr<StyleProperties> create() { return adopt_ref(*new StyleProperties); }
  
      NonnullRefPtr<StyleProperties> clone() const;
  
      template<typename Callback>
      inline void for_each_property(Callback callback) const
      {
          for (auto& it : m_property_values)
              callback((CSS::PropertyID)it.key, *it.value);
      }
  
      HashMap<CSS::PropertyID, NonnullRefPtr<StyleValue>>& properties() { return m_property_values; }
      HashMap<CSS::PropertyID, NonnullRefPtr<StyleValue>> const& properties() const { return m_property_values; }
  
      void set_property(CSS::PropertyID, NonnullRefPtr<StyleValue> value);
      void set_property(CSS::PropertyID, const StringView&);
      Optional<NonnullRefPtr<StyleValue>> property(CSS::PropertyID) const;
  
      Length length_or_fallback(CSS::PropertyID, const Length& fallback) const;
      LengthBox length_box(CSS::PropertyID left_id, CSS::PropertyID top_id, CSS::PropertyID right_id, CSS::PropertyID bottom_id, const CSS::Length& default_value) const;
      Color color_or_fallback(CSS::PropertyID, Layout::NodeWithStyle const&, Color fallback) const;
      Optional<CSS::TextAlign> text_align() const;
      CSS::Display display() const;
      Optional<CSS::Float> float_() const;
      Optional<CSS::Clear> clear() const;
      Optional<CSS::Cursor> cursor() const;
      Optional<CSS::WhiteSpace> white_space() const;
      Optional<CSS::LineStyle> line_style(CSS::PropertyID) const;
      Optional<CSS::TextDecorationLine> text_decoration_line() const;
      Optional<CSS::TextTransform> text_transform() const;
      Optional<CSS::ListStyleType> list_style_type() const;
      Optional<CSS::FlexDirection> flex_direction() const;
      Optional<CSS::FlexWrap> flex_wrap() const;
      Optional<CSS::FlexBasisData> flex_basis() const;
      Optional<float> flex_grow_factor() const;
      Optional<float> flex_shrink_factor() const;
      Optional<CSS::AlignItems> align_items() const;
      Optional<float> opacity() const;
      Optional<CSS::JustifyContent> justify_content() const;
      Optional<CSS::Overflow> overflow_x() const;
      Optional<CSS::Overflow> overflow_y() const;
      Optional<CSS::Repeat> background_repeat_x() const;
      Optional<CSS::Repeat> background_repeat_y() const;
      Optional<CSS::BoxShadowData> box_shadow() const;
      CSS::BoxSizing box_sizing() const;
  
      Vector<CSS::Transformation> transformations() const;
  
      Gfx::Font const& computed_font() const
      {
          VERIFY(m_font);
          return *m_font;
      }
  
      void set_computed_font(NonnullRefPtr<Gfx::Font> font)
      {
          m_font = move(font);
      }
  
      float line_height(const Layout::Node&) const;
  
      bool operator==(const StyleProperties&) const;
      bool operator!=(const StyleProperties& other) const { return !(*this == other); }
  
      Optional<CSS::Position> position() const;
      Optional<int> z_index() const;
  
      static NonnullRefPtr<Gfx::Font> font_fallback(bool monospace, bool bold);
  
  private:
      friend class StyleComputer;
  
      HashMap<CSS::PropertyID, NonnullRefPtr<StyleValue>> m_property_values;
      Optional<CSS::Overflow> overflow(CSS::PropertyID) const;
  
      mutable RefPtr<Gfx::Font> m_font;
  };
  
  }
  