Class: HexaPDF::Type::Actions::SetOCGState

Inherits:
HexaPDF::Type::Action show all
Defined in:
lib/hexapdf/type/actions/set_ocg_state.rb

Overview

A Set-OCG-state action changes the state of one or more optional content groups.

See: PDF2.0 s12.6.4.13, HexaPDF::Type::OptionalContentGroup

Constant Summary collapse

STATE_TYPE_MAPPING =

:nodoc:

{on: :ON, ON: :ON, off: :OFF, OFF: :OFF, # :nodoc:
toggle: :Toggle, Toggle: :Toggle}

Constants included from DictionaryFields

DictionaryFields::Boolean, DictionaryFields::PDFByteString, DictionaryFields::PDFDate

Instance Attribute Summary

Attributes inherited from Object

#data, #document, #must_be_indirect

Instance Method Summary collapse

Methods inherited from Dictionary

#[], #[]=, define_field, define_type, #delete, #each, each_field, #empty?, field, #key?, #to_hash, type, #type

Methods inherited from Object

#<=>, #==, #cache, #cached?, #clear_cache, deep_copy, #deep_copy, #document?, #eql?, field, #gen, #gen=, #hash, #indirect?, #initialize, #inspect, make_direct, #must_be_indirect?, #null?, #oid, #oid=, #type, #validate, #value, #value=

Constructor Details

This class inherits a constructor from HexaPDF::Object

Instance Method Details

#add_state_change(type, ocgs) ⇒ Object

Adds a state changing sequence to the /State array.

The type argument specifies how the state of the given optional content groups should be changed.

type

The type of sequence to add, either :on/:ON (for turning the OCGs on) , :off/:OFF (for turning the OCGs off), or :toggle/:Toggle (for toggling the state of the OCGs).

ocgs

A single optional content group or an array of optional content groups to which the state change defined with type should be applied. The OCGs can be specified via their dictionary or by name which uses the first found OCG with that name.



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# File 'lib/hexapdf/type/actions/set_ocg_state.rb', line 67

def add_state_change(type, ocgs)
  type = STATE_TYPE_MAPPING.fetch(type) do
    raise ArgumentError, "Invalid type #{type} specified, should be one of :on, :off or :toggle"
  end
  state = self[:State]
  state << type
  Array(ocgs).each do |ocg|
    if (ocg_name = ocg).kind_of?(String)
      ocg = document.optional_content.ocg(ocg_name, create: false)
      raise HexaPDF::Error, "Invalid OCG named '#{ocg_name}' specified" unless ocg
    end
    state << ocg
  end
end