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Edit File : doctype.rb \| Size : 6.64 KB
require "rexml/parent" require "rexml/parseexception" require "rexml/namespace" require 'rexml/entity' require 'rexml/attlistdecl' require 'rexml/xmltokens' module REXML # Represents an XML DOCTYPE declaration; that is, the contents of <!DOCTYPE # ... >. DOCTYPES can be used to declare the DTD of a document, as well as # being used to declare entities used in the document. class DocType < Parent include XMLTokens START = "<!DOCTYPE" STOP = ">" SYSTEM = "SYSTEM" PUBLIC = "PUBLIC" DEFAULT_ENTITIES = { 'gt'=>EntityConst::GT, 'lt'=>EntityConst::LT, 'quot'=>EntityConst::QUOT, "apos"=>EntityConst::APOS } # name is the name of the doctype # external_id is the referenced DTD, if given attr_reader :name, :external_id, :entities, :namespaces # Constructor # # dt = DocType.new( 'foo', '-//I/Hate/External/IDs' ) # # <!DOCTYPE foo '-//I/Hate/External/IDs'> # dt = DocType.new( doctype_to_clone ) # # Incomplete. Shallow clone of doctype # # +Note+ that the constructor: # # Doctype.new( Source.new( "<!DOCTYPE foo 'bar'>" ) ) # # is _deprecated_. Do not use it. It will probably disappear. def initialize( first, parent=nil ) @entities = DEFAULT_ENTITIES @long_name = @uri = nil if first.kind_of? String super() @name = first @external_id = parent elsif first.kind_of? DocType super( parent ) @name = first.name @external_id = first.external_id elsif first.kind_of? Array super( parent ) @name = first[0] @external_id = first[1] @long_name = first[2] @uri = first[3] elsif first.kind_of? Source super( parent ) parser = Parsers::BaseParser.new( first ) event = parser.pull if event[0] == :start_doctype @name, @external_id, @long_name, @uri, = event[1..-1] end else super() end end def node_type :doctype end def attributes_of element rv = [] each do \|child\| child.each do \|key,val\| rv << Attribute.new(key,val) end if child.kind_of? AttlistDecl and child.element_name == element end rv end def attribute_of element, attribute att_decl = find do \|child\| child.kind_of? AttlistDecl and child.element_name == element and child.include? attribute end return nil unless att_decl att_decl[attribute] end def clone DocType.new self end # output:: # Where to write the string # indent:: # An integer. If -1, no indentation will be used; otherwise, the # indentation will be this number of spaces, and children will be # indented an additional amount. # transitive:: # Ignored # ie_hack:: # Ignored def write( output, indent=0, transitive=false, ie_hack=false ) f = REXML::Formatters::Default.new indent( output, indent ) output << START output << ' ' output << @name output << " #@external_id" if @external_id output << " #{@long_name.inspect}" if @long_name output << " #{@uri.inspect}" if @uri unless @children.empty? next_indent = indent + 1 output << ' [' child = nil # speed @children.each { \|child\| output << "\n" f.write( child, output ) } output << "\n]" end output << STOP end def context @parent.context end def entity( name ) @entities[name].unnormalized if @entities[name] end def add child super(child) @entities = DEFAULT_ENTITIES.clone if @entities == DEFAULT_ENTITIES @entities[ child.name ] = child if child.kind_of? Entity end # This method retrieves the public identifier identifying the document's # DTD. # # Method contributed by Henrik Martensson def public case @external_id when "SYSTEM" nil when "PUBLIC" strip_quotes(@long_name) end end # This method retrieves the system identifier identifying the document's DTD # # Method contributed by Henrik Martensson def system case @external_id when "SYSTEM" strip_quotes(@long_name) when "PUBLIC" @uri.kind_of?(String) ? strip_quotes(@uri) : nil end end # This method returns a list of notations that have been declared in the # _internal_ DTD subset. Notations in the external DTD subset are not # listed. # # Method contributed by Henrik Martensson def notations children().select {\|node\| node.kind_of?(REXML::NotationDecl)} end # Retrieves a named notation. Only notations declared in the internal # DTD subset can be retrieved. # # Method contributed by Henrik Martensson def notation(name) notations.find { \|notation_decl\| notation_decl.name == name } end private # Method contributed by Henrik Martensson def strip_quotes(quoted_string) quoted_string =~ /^[\'\"].*[\´\"]$/ ? quoted_string[1, quoted_string.length-2] : quoted_string end end # We don't really handle any of these since we're not a validating # parser, so we can be pretty dumb about them. All we need to be able # to do is spew them back out on a write() # This is an abstract class. You never use this directly; it serves as a # parent class for the specific declarations. class Declaration < Child def initialize src super() @string = src end def to_s @string+'>' end # == DEPRECATED # See REXML::Formatters # def write( output, indent ) output << to_s end end public class ElementDecl < Declaration def initialize( src ) super end end class ExternalEntity < Child def initialize( src ) super() @entity = src end def to_s @entity end def write( output, indent ) output << @entity end end class NotationDecl < Child attr_accessor :public, :system def initialize name, middle, pub, sys super(nil) @name = name @middle = middle @public = pub @system = sys end def to_s "<!NOTATION #@name #@middle#{ @public ? ' ' + public.inspect : '' }#{ @system ? ' ' +@system.inspect : '' }>" end def write( output, indent=-1 ) output << to_s end # This method retrieves the name of the notation. # # Method contributed by Henrik Martensson def name @name end end end Back

Edit File : doctype.rb | Size : 6.64 KB

require "rexml/parent"
require "rexml/parseexception"
require "rexml/namespace"
require 'rexml/entity'
require 'rexml/attlistdecl'
require 'rexml/xmltokens'

module REXML
  # Represents an XML DOCTYPE declaration; that is, the contents of <!DOCTYPE
  # ... >.  DOCTYPES can be used to declare the DTD of a document, as well as
  # being used to declare entities used in the document.
  class DocType < Parent
    include XMLTokens
    START = "<!DOCTYPE"
    STOP = ">"
    SYSTEM = "SYSTEM"
    PUBLIC = "PUBLIC"
    DEFAULT_ENTITIES = { 
      'gt'=>EntityConst::GT, 
      'lt'=>EntityConst::LT, 
      'quot'=>EntityConst::QUOT, 
      "apos"=>EntityConst::APOS 
    }

# name is the name of the doctype
    # external_id is the referenced DTD, if given
    attr_reader :name, :external_id, :entities, :namespaces

# Constructor
    #
    #   dt = DocType.new( 'foo', '-//I/Hate/External/IDs' )
    #   # <!DOCTYPE foo '-//I/Hate/External/IDs'>
    #   dt = DocType.new( doctype_to_clone )
    #   # Incomplete.  Shallow clone of doctype
    #
    # +Note+ that the constructor: 
    #
    #  Doctype.new( Source.new( "<!DOCTYPE foo 'bar'>" ) )
    #
    # is _deprecated_.  Do not use it.  It will probably disappear.
    def initialize( first, parent=nil )
      @entities = DEFAULT_ENTITIES
      @long_name = @uri = nil
      if first.kind_of? String
        super()
        @name = first
        @external_id = parent
      elsif first.kind_of? DocType
        super( parent )
        @name = first.name
        @external_id = first.external_id
      elsif first.kind_of? Array
        super( parent )
        @name = first[0]
        @external_id = first[1]
        @long_name = first[2]
        @uri = first[3]
      elsif first.kind_of? Source
        super( parent )
        parser = Parsers::BaseParser.new( first )
        event = parser.pull
        if event[0] == :start_doctype
          @name, @external_id, @long_name, @uri, = event[1..-1]
        end
      else
        super()
      end
    end

def node_type
      :doctype
    end

def attributes_of element
      rv = []
      each do |child|
        child.each do |key,val|
          rv << Attribute.new(key,val)
        end if child.kind_of? AttlistDecl and child.element_name == element
      end
      rv
    end

def attribute_of element, attribute
      att_decl = find do |child|
        child.kind_of? AttlistDecl and
        child.element_name == element and
        child.include? attribute
      end
      return nil unless att_decl
      att_decl[attribute]
    end

def clone
      DocType.new self
    end

# output::
    #   Where to write the string
    # indent::
    #   An integer.  If -1, no indentation will be used; otherwise, the
    #   indentation will be this number of spaces, and children will be
    #   indented an additional amount.
    # transitive::
    #   Ignored
    # ie_hack::
    #   Ignored
    def write( output, indent=0, transitive=false, ie_hack=false )
      f = REXML::Formatters::Default.new
      indent( output, indent )
      output << START
      output << ' '
      output << @name
      output << " #@external_id" if @external_id
      output << " #{@long_name.inspect}" if @long_name
      output << " #{@uri.inspect}" if @uri
      unless @children.empty?
        next_indent = indent + 1
        output << ' ['
        child = nil    # speed
        @children.each { |child|
          output << "\n"
          f.write( child, output )
        }
        output << "\n]"
      end
      output << STOP
    end

def context
      @parent.context
    end

def entity( name )
      @entities[name].unnormalized if @entities[name]
    end

def add child
      super(child)
      @entities = DEFAULT_ENTITIES.clone if @entities == DEFAULT_ENTITIES
      @entities[ child.name ] = child if child.kind_of? Entity
    end
    
    # This method retrieves the public identifier identifying the document's 
    # DTD.
    #
    # Method contributed by Henrik Martensson
    def public
      case @external_id
      when "SYSTEM"
        nil
      when "PUBLIC"
        strip_quotes(@long_name)
      end
    end
    
    # This method retrieves the system identifier identifying the document's DTD
    #
    # Method contributed by Henrik Martensson
    def system
      case @external_id
      when "SYSTEM"
        strip_quotes(@long_name)
      when "PUBLIC"
        @uri.kind_of?(String) ? strip_quotes(@uri) : nil
      end
    end
    
    # This method returns a list of notations that have been declared in the
    # _internal_ DTD subset. Notations in the external DTD subset are not 
    # listed.
    #
    # Method contributed by Henrik Martensson
    def notations
      children().select {|node| node.kind_of?(REXML::NotationDecl)}
    end
    
    # Retrieves a named notation. Only notations declared in the internal
    # DTD subset can be retrieved.
    #
    # Method contributed by Henrik Martensson
    def notation(name)
      notations.find { |notation_decl|
        notation_decl.name == name
      }
    end
    
    private
    
    # Method contributed by Henrik Martensson
    def strip_quotes(quoted_string)
      quoted_string =~ /^[\'\"].*[\´\"]$/ ?
        quoted_string[1, quoted_string.length-2] :
        quoted_string
    end
  end

# We don't really handle any of these since we're not a validating
  # parser, so we can be pretty dumb about them.  All we need to be able
  # to do is spew them back out on a write()

# This is an abstract class.  You never use this directly; it serves as a
  # parent class for the specific declarations.
  class Declaration < Child
    def initialize src
      super()
      @string = src
    end

def to_s
      @string+'>'
    end

# == DEPRECATED
    # See REXML::Formatters
    #
    def write( output, indent )
      output << to_s
    end
  end
  
  public
  class ElementDecl < Declaration
    def initialize( src )
      super
    end
  end

class ExternalEntity < Child
    def initialize( src )
      super()
      @entity = src
    end
    def to_s
      @entity
    end
    def write( output, indent )
      output << @entity
    end
  end

class NotationDecl < Child
    attr_accessor :public, :system
    def initialize name, middle, pub, sys
      super(nil)
      @name = name
      @middle = middle
      @public = pub
      @system = sys
    end

def to_s
      "<!NOTATION #@name #@middle#{
        @public ? ' ' + public.inspect : '' 
      }#{
        @system ? ' ' +@system.inspect : ''
      }>"
    end

def write( output, indent=-1 )
      output << to_s
    end
    
    # This method retrieves the name of the notation.
    #
    # Method contributed by Henrik Martensson
    def name
      @name
    end
  end
end

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