class PDFRavager::Strategies::XFA

Public Class Methods

new(stamper) click to toggle source
# File lib/pdf_ravager/strategies/xfa.rb, line 4
def initialize(stamper)
  @xfa = stamper.getAcroFields.getXfa
end

Public Instance Methods

set_field_values(template) click to toggle source
# File lib/pdf_ravager/strategies/xfa.rb, line 8
def set_field_values(template)
  doc = to_nokogiri_xml
  template.fields.select{|f| f.respond_to?(:set_xfa_value)}.each do |f|
    # first, assume the user-provided field name is an xpath and use it directly:
    strict_match =
      begin
        doc.xpath(f.xfa_name)
      rescue Nokogiri::XML::XPath::SyntaxError
        []
      end
    if strict_match.any?
      strict_match.each{|node| f.set_xfa_value(node) }
    else
      # otherwise, we'll loosely match the field name anywhere in the document:
      loose_match = doc.xpath("//*[local-name()='field'][@name='#{f.xfa_name}']")
      loose_match.each{|node| f.set_xfa_value(node) }
    end
  end
  @xfa.setDomDocument(doc.to_java)
  @xfa.setChanged(true)
end
set_read_only() click to toggle source
# File lib/pdf_ravager/strategies/xfa.rb, line 30
def set_read_only
  doc = to_nokogiri_xml
  doc.xpath("//*[local-name()='field']").each do |node|
    node["access"] = "readOnly"
  end
  @xfa.setDomDocument(doc.to_java)
  @xfa.setChanged(true)
end

Private Instance Methods

to_nokogiri_xml() click to toggle source
# File lib/pdf_ravager/strategies/xfa.rb, line 41
def to_nokogiri_xml
  # the double-load is to work around a Nokogiri bug I found:
  # https://github.com/sparklemotion/nokogiri/issues/781
  Nokogiri::XML(Nokogiri::XML::Document.wrap(@xfa.getDomDocument).to_xml)
end