Class: InlineSvg::TransformPipeline::Transformations::AriaAttributes

Inherits:
Transformation
  • Object
show all
Defined in:
lib/inline_svg/transform_pipeline/transformations/aria_attributes.rb

Instance Attribute Summary

Attributes inherited from Transformation

#value

Instance Method Summary collapse

Methods inherited from Transformation

create_with_value, #initialize, #with_svg

Constructor Details

This class inherits a constructor from InlineSvg::TransformPipeline::Transformations::Transformation

Instance Method Details

#element_id_for(base, element) ⇒ Object 



24
25
26
27
28
29
30
 
# File 'lib/inline_svg/transform_pipeline/transformations/aria_attributes.rb', line 24

def element_id_for(base, element)
  if element["id"].nil?
    InlineSvg::IdGenerator.generate(base, element.text)
  else
    InlineSvg::IdGenerator.generate(element["id"], element.text)
  end
end

#transform(doc) ⇒ Object 



3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/inline_svg/transform_pipeline/transformations/aria_attributes.rb', line 3

def transform(doc)
  with_svg(doc) do |svg|
    # Add role
    svg["role"] = "img"

    # Build aria-labelledby string
    aria_elements = []
    svg.search("title").each do |element|
      aria_elements << element["id"] = element_id_for("title", element)
    end

    svg.search("desc").each do |element|
      aria_elements << element["id"] = element_id_for("desc", element)
    end

    if aria_elements.any?
      svg["aria-labelledby"] = aria_elements.join(" ")
    end
  end
end