Class: Emfsvg::Svg::Element

Inherits:

Object

• Object
• Emfsvg::Svg::Element

Defined in:

lib/emfsvg/svg/element.rb

Overview

Base value object for an SVG element. Subclasses (Svg::Elements::*) carry typed semantic fields; the base provides a uniform interface for the translation layer's dispatch.

Element instances are immutable: built once from a Nokogiri node via the .from_node factory. The node is not retained.

Direct Known Subclasses

Emfsvg::Svg::Elements::Circle, Emfsvg::Svg::Elements::ClipPath, Emfsvg::Svg::Elements::Defs, Emfsvg::Svg::Elements::Ellipse, Emfsvg::Svg::Elements::Group, Emfsvg::Svg::Elements::Image, Emfsvg::Svg::Elements::Line, Emfsvg::Svg::Elements::Path, Emfsvg::Svg::Elements::Polygon, Emfsvg::Svg::Elements::Polyline, Emfsvg::Svg::Elements::Rect, Emfsvg::Svg::Elements::Text, OpenElement

Constant Summary

ELEMENT_NAME =

"abstract"

Class Attribute Summary

• .registry ⇒ Object readonly

  Returns the value of attribute registry.

Class Method Summary

• .from_node(node) ⇒ Object
• .register(element_name, subclass) ⇒ Object

Instance Method Summary

• #children ⇒ Object
• #clip_path ⇒ Object

  All elements expose clip_path (nil by default) so the SharedGdi module can treat every element uniformly.

• #element_name ⇒ Object

Class Attribute Details

.registry ⇒ Object (readonly)

Returns the value of attribute registry.

# File 'lib/emfsvg/svg/element.rb', line 35

def registry
  @registry
end

Class Method Details

.from_node(node) ⇒ Object

# File 'lib/emfsvg/svg/element.rb', line 41

def from_node(node)
  subclass = @registry[node.name]
  return subclass.from_node(node) if subclass

  OpenElement.new(name: node.name, children: node.element_children.map do |c|
    from_node(c)
  end)
end

.register(element_name, subclass) ⇒ Object

# File 'lib/emfsvg/svg/element.rb', line 37

def register(element_name, subclass)
  @registry[element_name] = subclass
end

Instance Method Details

#children ⇒ Object

# File 'lib/emfsvg/svg/element.rb', line 18

def children
  []
end

#clip_path ⇒ Object

All elements expose clip_path (nil by default) so the SharedGdi module can treat every element uniformly. Subclasses with the attribute override via attr_reader.

# File 'lib/emfsvg/svg/element.rb', line 25

def clip_path
  nil
end

#element_name ⇒ Object

# File 'lib/emfsvg/svg/element.rb', line 14

def element_name
  self.class::ELEMENT_NAME
end