Method: RBPDF#rollbackTransaction

Defined in:
lib/rbpdf.rb

#rollbackTransaction(this_self = false) ⇒ Object Also known as: rollback_transaction

This method allows to undo the latest transaction by returning the latest saved RBPDF object with startTransaction().

@param boolean :this_self

if true restores current class object to previous state without the need of reassignment via the returned value.

@return

RBPDF object.

@access public
@since 4.5.029 (2009-03-19)


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# File 'lib/rbpdf.rb', line 16773

def rollbackTransaction(this_self=false)
  if @objcopy
    if @objcopy.diskcache
      # truncate files to previous values
      @objcopy.cache_file_length.each { |file, length|
        File.truncate(file, length) if File.exist?(file)
      }
      @pages.each_with_index do |file, i|
        if @prev_pages[i] and File.exist?(@prev_pages[i].path)
          File.delete(file.path)
        end
      end
    end
    destroy(true, true)
    if this_self
      objvars = @objcopy.instance_variables
      objvars.each {|key|
        instance_variable_set(key, @objcopy.instance_variable_get(key)) if key.to_s != '@objcopy'
      }
    end
    return @objcopy
  end
  return self
end