Class: EmbedXMP::SVG

Inherits:
ImageFile show all
Defined in:
lib/embed_xmp/svg.rb

Overview

SVG images

Constant Summary collapse

SVG_NAMESPACE = 
'http://www.w3.org/2000/svg'

Instance Method Summary collapse

Methods inherited from ImageFile

#insert_into_file, #read_io_or_string

Constructor Details

#initialize(input_file) ⇒ SVG

Returns a new instance of SVG.



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# File 'lib/embed_xmp/svg.rb', line 16

def initialize(input_file)
  file = read_io_or_string(input_file)
  svg = Nokogiri::XML(file) do |conf|
    conf.options = Nokogiri::XML::ParseOptions::NOBLANKS
  end

  raise 'NoSVGnamespace' if SVG_NAMESPACE != svg.root.namespace.href

  @image_file = svg
end

Instance Method Details

#join_sidecar(sidecar_file, xpacked: false) ⇒ Object

Join an XMP sidecar file into an SVG image file.



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# File 'lib/embed_xmp/svg.rb', line 28

def join_sidecar(sidecar_file, xpacked: false)
  remove_xmp

  xmp_data = read_io_or_string(sidecar_file)
  insert_xmp_metadata_into_svg(create_metadata(xmp_data, xpacked))
end

#remove_xmp ⇒ Object

Removes XMP metadata in /svg/metadata/rdf:RDF. Will only detect XMP data wrapped in an XPACKET processing instruction.



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# File 'lib/embed_xmp/svg.rb', line 37

def remove_xmp
  @image_file.root.xpath('//svg:metadata', 'svg' => 'http://www.w3.org/2000/svg')
    .each do |svg_metadata|
    xml_pi = svg_metadata.xpath('processing-instruction()')

    if xml_pi.empty? ||
       xml_pi.first.content != EmbedXMP::XMP::XPACKET_PDATA
      next
    end

    svg_metadata.remove
  end
end

#write(output_file) ⇒ Object 



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# File 'lib/embed_xmp/svg.rb', line 51

def write(output_file)
  data = @image_file.to_xml(encoding: 'utf-8', indent: 2)
  super(output_file, data: data)
end