Class: Peanuts::XML::LibXML::Writer

Inherits:
Writer
  • Object
show all
Defined in:
lib/peanuts/xml/libxml.rb

Constant Summary collapse

DEFAULT_OPTIONS = 
{}

Instance Method Summary collapse

Methods inherited from Writer

new

Constructor Details

#initialize(dest, options = {}) ⇒ Writer

Returns a new instance of Writer.



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# File 'lib/peanuts/xml/libxml.rb', line 20

def initialize(dest, options = {})
  @dest = case dest
  when :string
    ''
  when :document
    ::LibXML::XML::Document.new
  when ::LibXML::XML::Document
    dest
  else
    raise ArgumentError, "unsupported destination #{dest.inspect}" unless dest.respond_to?(:<<)
    dest
  end
  @options = LibXML.libxml_opt(options, DEFAULT_OPTIONS)
end

Instance Method Details

#result ⇒ Object 



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# File 'lib/peanuts/xml/libxml.rb', line 35

def result
  @dest
end

#write(node_type, local_name = nil, namespace_uri = nil, prefix = nil) {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/peanuts/xml/libxml.rb', line 54

def write(node_type, local_name = nil, namespace_uri = nil, prefix = nil)
  case node_type
  when :element
    @node = ::LibXML::XML::Node.new(local_name)
    @parent << @node if @parent
    if namespace_uri || prefix
      unless namespace_uri
        defns = @node.namespaces.default
        namespace_uri = defns ? defns.href : ''
      end
      @node.namespaces.namespace = mkns(@node, namespace_uri, prefix)
    end
  when :attribute
    @node = ::LibXML::XML::Attr.new(@parent, local_name, '', namespace_uri && mkns(@parent, namespace_uri, prefix))
  else
    raise "unsupported node type #{node_type.inspect}"
  end

  exparent, @parent = @parent, @node

  yield self

  if exparent.nil?
    case @dest
    when ::LibXML::XML::Document
      @dest.root = @parent
    else
      @dest << @parent.to_s(@options)
    end
  end

  @parent = exparent
end

#write_namespaces(namespaces) ⇒ Object 



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# File 'lib/peanuts/xml/libxml.rb', line 48

def write_namespaces(namespaces)
  for prefix, uri in namespaces
    mkns(@node, uri, prefix)
  end
end

#write_value(value) ⇒ Object 



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# File 'lib/peanuts/xml/libxml.rb', line 39

def write_value(value)
  case @node
  when ::LibXML::XML::Attr
    @node.value = value || ''
  else
    @node.content = value || ''
  end
end