Class: DoctorNinja::Parsers::Drawing

Inherits:
Base
  • Object
show all
Includes:
Magick
Defined in:
lib/doctor_ninja/parsers/drawing.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#initialize, #parse_children

Constructor Details

This class inherits a constructor from DoctorNinja::Parsers::Base

Class Method Details

.applicable_to?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/doctor_ninja/parsers/drawing.rb', line 8

def self.applicable_to?(node)
  node.name == "drawing"
end

Instance Method Details

#extent ⇒ Object 



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# File 'lib/doctor_ninja/parsers/drawing.rb', line 28

def extent
  @extent ||= {
    x: extent_node.attribute("cx").value.to_i,
    y: extent_node.attribute("cy").value.to_i
  }
end

#extent_node ⇒ Object 



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# File 'lib/doctor_ninja/parsers/drawing.rb', line 35

def extent_node
  @node.xpath(".//wp:extent")
end

#parse ⇒ Object 



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# File 'lib/doctor_ninja/parsers/drawing.rb', line 12

def parse
  width = extent[:x]/DoctorNinja::EMU_PER_PIXEL
  height = extent[:y]/DoctorNinja::EMU_PER_PIXEL

  rvg = RVG.new(width,height).viewbox(0,0,width,height) do |canvas|
    context = @context.dup
    context[:canvas] = canvas
    parse_children(context)
  end

  format = "png"
  base64 = Base64.encode64 rvg.draw.to_blob { self.format = format }

  "<img src=\"data:image/#{format};base64,#{base64}\"/>"
end