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

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

Constant Summary collapse

INSTANCE = 
new

Instance Method Summary collapse

Methods inherited from Base

#extract_leading_trailing_whitespace, #extract_text_from_content, #extract_title, #node_has_ancestor?, #textnode_after_start_with?, #textnode_before_end_with?, #treat_children_coradoc, #treat_coradoc, #unconstrained_after?, #unconstrained_before?

Instance Method Details

#copy_temp_file(imgdata) ⇒ Object 



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# File 'lib/coradoc/html/input/converters/img.rb', line 62

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/html/input/converters/img.rb', line 27

def datauri2file(src)
  return unless src

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

  dest_dir = Pathname.new(Coradoc::Html::Input.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}"

  if File.exist?(image_src_path)
    FileUtils.cp(image_src_path, image_dest_path)
  else
    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/html/input/converters/img.rb', line 55

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::Html::Input.config.sourcedir).join(src)]
end

#image_number ⇒ Object 



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# File 'lib/coradoc/html/input/converters/img.rb', line 16

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

#image_number_increment ⇒ Object 



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

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

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



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# File 'lib/coradoc/html/input/converters/img.rb', line 72

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

  # Convert width/height to integers if they are numeric strings
  width = width.to_i if width&.match?(/\A\d+\z/)
  height = height.to_i if height&.match?(/\A\d+\z/)

  title = extract_title(node)

  src = datauri2file(src) if Coradoc::Html::Input.config.external_images

  # Use CoreModel::Image
  return unless src

  Coradoc::CoreModel::Image.new(
    src: src,
    alt: alt,
    caption: title,
    width: width&.to_s,
    height: height&.to_s,
    id: id
  )
end