Class: Coradoc::Input::Html::Converters::Img

Inherits:
Base
  • Object
show all
Defined in:
lib/coradoc/input/html/converters/img.rb

Instance Method Summary collapse

Methods inherited from Base

#convert, #extract_leading_trailing_whitespace, #extract_title, #node_has_ancestor?, #textnode_after_start_with?, #textnode_before_end_with?, #treat, #treat_children, #treat_children_coradoc, #treat_coradoc, #unconstrained_after?, #unconstrained_before?

Instance Method Details

#copy_temp_file(imgdata) ⇒ Object 



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# File 'lib/coradoc/input/html/converters/img.rb', line 60

def copy_temp_file(imgdata)
  f = Tempfile.open(["radoc", ".jpg"])
  f.binmode
  f.write(Base64.strict_decode64(imgdata))
  f.rewind
  ext = Marcel::MimeType.for(f).sub(%r{^[^/]+/}, "")
  ext = "svg" if ext == "svg+xml"
  [ext, f.path, f]
end

#datauri2file(src) ⇒ Object 



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# File 'lib/coradoc/input/html/converters/img.rb', line 23

def datauri2file(src)
  return unless src

  %r{^data:image/(?:[^;]+);base64,(?<imgdata>.+)$} =~ src

  dest_dir = Pathname.new(Coradoc::Input::Html.config.destination).dirname
  images_dir = dest_dir.join("images")
  FileUtils.mkdir_p(images_dir)

  ext, image_src_path, tempfile = determine_image_src_path(src,
                                                           imgdata)
  image_dest_path = images_dir + "#{image_number}.#{ext}"

  # puts "image_dest_path: #{image_dest_path.to_s}"
  # puts "image_src_path: #{image_src_path.to_s}"

  if File.exist?(image_src_path)
    FileUtils.cp(image_src_path, image_dest_path)
  else
    @annotate_missing = image_src_path
    Kernel.warn "Image #{image_src_path} does not exist"
  end

  image_number_increment

  image_dest_path.relative_path_from(dest_dir)
ensure
  tempfile&.close!
end

#determine_image_src_path(src, imgdata) ⇒ Object 



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# File 'lib/coradoc/input/html/converters/img.rb', line 53

def determine_image_src_path(src, imgdata)
  return copy_temp_file(imgdata) if imgdata

  ext = File.extname(src).strip.downcase[1..]
  [ext, Pathname.new(Coradoc::Input::Html.config.sourcedir).join(src)]
end

#image_number ⇒ Object 



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# File 'lib/coradoc/input/html/converters/img.rb', line 12

def image_number
  sprintf(
    Coradoc::Input::Html.config.image_counter_pattern,
    Coradoc::Input::Html.config.image_counter,
  )
end

#image_number_increment ⇒ Object 



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# File 'lib/coradoc/input/html/converters/img.rb', line 19

def image_number_increment
  Coradoc::Input::Html.config.image_counter += 1
end

#to_coradoc(node, _state = {}) ⇒ Object 



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# File 'lib/coradoc/input/html/converters/img.rb', line 70

def to_coradoc(node, _state = {})
  id = node["id"]
  alt   = node["alt"]
  src   = node["src"]
  width = node["width"]
  height = node["height"]

  width = width.to_i if width&.match?(/\A\d+\z/)
  height = height.to_i if height&.match?(/\A\d+\z/)

  title = extract_title(node)

  if Coradoc::Input::Html.config.external_images
    # puts "external image conversion #{id}, #{src}"
    src = datauri2file(src)
  end

  attributes = Coradoc::Element::AttributeList.new
  # attributes.add_named("id", id) if id
  if alt # && !alt.to_s.empty?
    attributes.add_positional(alt)
  elsif width || height
    attributes.add_positional(nil)
  end
  attributes.add_named("title", title) if title && !title.empty?
  attributes.add_positional(width) if width
  attributes.add_positional(height) if height

  if src
    Coradoc::Element::Image::BlockImage.new(title, id, src,
                                            attributes: attributes,
                                            annotate_missing: @annotate_missing)
  end
end