Class: IRuby::Display

Inherits:
Object
  • Object
show all
Defined in:
lib/iruby/display.rb

Constant Summary collapse

SUPPORTED_MIMES = 
%w(
text/plain
text/html
text/latex
application/json
application/javascript
image/png
image/jpeg
image/svg+xml)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(obj, options) ⇒ Display

Returns a new instance of Display.



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# File 'lib/iruby/display.rb', line 15

def initialize(obj, options)
  @data = { 'text/plain' => obj.inspect }
  if options[:mime]
    add(options[:mime], obj)
  elsif obj.respond_to?(:to_iruby)
    add(*obj.to_iruby)
  elsif obj.respond_to?(:to_html)
    add('text/html', obj.to_html)
  elsif obj.respond_to?(:to_svg)
    obj.render if defined?(Rubyvis) && Rubyvis::Mark === obj
    add('image/svg+xml', obj.to_svg)
  elsif obj.respond_to?(:to_latex)
    add('text/latex', obj.to_latex)
  elsif defined?(Gruff::Base) && Gruff::Base === obj
    add('image/png', obj.to_blob)
  elsif (defined?(Magick::Image) && Magick::Image === obj) ||
       (defined?(MiniMagick::Image) && MiniMagick::Image === obj)
    format = obj.format || 'PNG'
    add(format == 'PNG' ? 'image/png' : 'image/jpeg', obj.to_blob {|i| i.format = format })
  elsif obj.respond_to?(:path) && File.readable?(obj.path)
    mime = MimeMagic.by_path(obj.path).to_s
    add(mime, File.read(obj.path)) if SUPPORTED_MIMES.include?(mime)
  elsif defined?(Gnuplot::Plot) && Gnuplot::Plot === obj
    Tempfile.open('plot') do |f|
      obj.terminal 'svg enhanced'
      obj.output f.path
      Gnuplot.open do |io|
        io << obj.to_gplot
        io << obj.store_datasets
      end
      add('image/svg+xml', File.read(f.path))
    end
  elsif defined?(Matrix) && Matrix === obj
    add('text/latex', format_matrix(obj, obj.row_count, obj.column_count))
  elsif defined?(GSL::Matrix) && GSL::Matrix === obj
    add('text/latex', format_matrix(obj, obj.size1, obj.size2))
  elsif defined?(GSL::Vector) && GSL::Vector === obj
    add('text/latex', format_vector(obj.to_a))
  elsif defined?(GSL::Complex) && GSL::Complex === obj
    add('text/latex', "$#{obj.re}+#{obj.im}i$")
  elsif defined?(NArray) && NArray === obj
    add('text/latex', obj.dim == 2 ?
        format_matrix(obj.transpose, obj.shape[1], obj.shape[0]) :
        format_vector(obj.to_a))
  end
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/iruby/display.rb', line 3

def data
  @data
end