Class: Origami::FDF

Inherits:
Object
  • Object
show all
Defined in:
lib/origami/extensions/fdf.rb,
lib/origami/parsers/fdf.rb

Overview

Class representing an AcroForm Forms Data Format file.

Defined Under Namespace

Classes: Annotation, Catalog, Dictionary, Field, Header, IconFit, JavaScript, NamedPageReference, Page, Parser, Revision, Template

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parser = nil) ⇒ FDF

:nodoc:



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# File 'lib/origami/extensions/fdf.rb', line 208

def initialize(parser = nil) #:nodoc:
    @header = FDF::Header.new
    @revisions = [ Revision.new(self) ]
    @revisions.first.trailer = Trailer.new

    init if parser.nil?
end

Instance Attribute Details

#header ⇒ Object

Returns the value of attribute header.



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# File 'lib/origami/extensions/fdf.rb', line 206

def header
  @header
end

#revisions ⇒ Object

Returns the value of attribute revisions.



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# File 'lib/origami/extensions/fdf.rb', line 206

def revisions
  @revisions
end

Class Method Details

.read(path, options = {}) ⇒ Object 



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# File 'lib/origami/extensions/fdf.rb', line 41

def self.read(path, options = {})
    path = File.expand_path(path) if path.is_a?(::String)

    FDF::Parser.new(options).parse(path)
end

Instance Method Details

#<<(object) ⇒ Object Also known as: insert 



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# File 'lib/origami/extensions/fdf.rb', line 216

def <<(object)
    object.set_indirect(true)
    object.set_document(self)

    if object.no.zero?
        maxno = 1
        maxno = maxno.succ while get_object(maxno)

        object.generation = 0
        object.no = maxno
    end

    @revisions.first.body[object.reference] = object

    object.reference
end

#cast_object(reference, type, parser = nil) ⇒ Object

:nodoc:



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# File 'lib/origami/extensions/fdf.rb', line 252

def cast_object(reference, type, parser = nil) #:nodoc:
    @revisions.each do |rev|
        if rev.body.include?(reference) and type < rev.body[reference].class
            rev.body[reference] = rev.body[reference].cast_to(type, parser)

            rev.body[reference]
        else
            nil
        end
    end
end

#Catalog ⇒ Object 



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# File 'lib/origami/extensions/fdf.rb', line 264

def Catalog
    get_object(@revisions.first.trailer.Root)
end

#get_object(no, generation = 0) ⇒ Object

:nodoc:



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# File 'lib/origami/extensions/fdf.rb', line 234

def get_object(no, generation = 0) #:nodoc:
    case no
    when Reference
      target = no
    when ::Integer
      target = Reference.new(no, generation)
    when Origami::Object
      return no
    end

    @revisions.first.body[target]
end

#indirect_objects ⇒ Object Also known as: root_objects 



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# File 'lib/origami/extensions/fdf.rb', line 247

def indirect_objects
    @revisions.inject([]) do |set, rev| set.concat(rev.objects) end
end

#save(path) ⇒ Object 



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# File 'lib/origami/extensions/fdf.rb', line 268

def save(path)
    bin = "".b
    bin << @header.to_s

    lastno, brange = 0, 0

    xrefs = [ XRef.new(0, XRef::FIRSTFREE, XRef::FREE) ]
    xrefsection = XRef::Section.new

    @revisions.first.body.values.sort.each { |obj|
        if (obj.no - lastno).abs > 1
            xrefsection << XRef::Subsection.new(brange, xrefs)
            brange = obj.no
            xrefs.clear
        end

        xrefs << XRef.new(bin.size, obj.generation, XRef::USED)
        lastno = obj.no

        obj.pre_build

        bin << obj.to_s

        obj.post_build
    }

    xrefsection << XRef::Subsection.new(brange, xrefs)

    @xreftable = xrefsection
    @trailer ||= Trailer.new
    @trailer.Size = @revisions.first.body.size + 1
    @trailer.startxref = bin.size

    bin << @xreftable.to_s
    bin << @trailer.to_s

    if path.respond_to?(:write)
        io = path
    else
        path = File.expand_path(path)
        io = File.open(path, "wb", encoding: 'binary')
        close = true
    end

    begin
        io.write(bin)
    ensure
        io.close if close
    end

    self
end