Module: YAML::BaseEmitter

Defined in:
lib/yaml/baseemitter.rb

Instance Method Summary collapse

Instance Method Details

#binary_base64(value) ⇒ Object

Emit binary data



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# File 'lib/yaml/baseemitter.rb', line 28

def binary_base64( value )
    self << "!binary "
    self.node_text( [value].pack("m"), '|' )
end

#double(value) ⇒ Object

Emit double-quoted string



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# File 'lib/yaml/baseemitter.rb', line 89

def double( value )
	"\"#{YAML.escape( value )}\"" 
end

#fold(value) ⇒ Object

Folding paragraphs within a column



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# File 'lib/yaml/baseemitter.rb', line 134

def fold( value )
          value.gsub( /(^[ \t]+.*$)|(\S.{0,#{options(:BestWidth) - 1}})(?:[ \t]+|(\n+(?=[ \t]|\Z))|$)/ ) do
              $1 || $2 + ( $3 || "\n" )
          end
end

#indent(mod = nil) ⇒ Object

Write a current indent



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# File 'lib/yaml/baseemitter.rb', line 113

def indent( mod = nil )
          #p [ self.id, level, mod, :INDENT ]
          if level <= 0
              mod ||= 0
          else
              mod ||= options(:Indent)
              mod += ( level - 1 ) * options(:Indent)
          end
          return " " * mod
end

#indent! ⇒ Object

Add indent to the buffer



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# File 'lib/yaml/baseemitter.rb', line 127

def indent!
	self << indent
end

#indent_text(text, mod, first_line = true) ⇒ Object

Write a text block with the current indent



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# File 'lib/yaml/baseemitter.rb', line 103

def indent_text( text, mod, first_line = true )
	return "" if text.to_s.empty?
          spacing = indent( mod )
          text = text.gsub( /\A([^\n])/, "#{ spacing }\\1" ) if first_line
	return text.gsub( /\n^([^\n])/, "\n#{spacing}\\1" )
end

#map(type, &e) ⇒ Object

Quick mapping



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# File 'lib/yaml/baseemitter.rb', line 143

def map( type, &e )
    val = Mapping.new
    e.call( val )
			self << "#{type} " if type.length.nonzero?

			#
			# Empty hashes
			#
			if val.length.zero?
				self << "{}"
        @seq_map = false
			else
        # FIXME
        # if @buffer.length == 1 and options(:UseHeader) == false and type.length.zero? 
			    #     @headless = 1 
        # end

        defkey = @options.delete( :DefaultKey )
        if defkey
            seq_map_shortcut
            self << "= : "
            defkey.to_yaml( :Emitter => self )
        end

				#
				# Emit the key and value
				#
        val.each { |v|
            seq_map_shortcut
            if v[0].is_complex_yaml?
                self << "? "
            end
            v[0].to_yaml( :Emitter => self )
            if v[0].is_complex_yaml?
                self << "\n"
                indent!
            end
            self << ": " 
            v[1].to_yaml( :Emitter => self )
        }
			end
end

#node_text(value, block = nil) ⇒ Object

Emit plain, normal flowing text



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# File 'lib/yaml/baseemitter.rb', line 36

def node_text( value, block = nil )
          @seq_map = false
	valx = value.dup
          unless block
          block =
              if options(:UseBlock)
                  '|'
              elsif not options(:UseFold) and valx =~ /\n[ \t]/ and not valx =~ /#{YAML::ESCAPE_CHAR}/
                  '|'
              else
                  '>'
              end 

              indt = $&.to_i if block =~ /\d+/
              if valx =~ /(\A\n*[ \t#]|^---\s+)/
                  indt = options(:Indent) unless indt.to_i > 0
                  block += indt.to_s
              end

          block +=
              if valx =~ /\n\Z\n/
                  "+"
              elsif valx =~ /\Z\n/
                  ""
              else
                  "-"
              end
          end
          block += "\n"
          if block[0] == ?"
              esc_skip = ( "\t\n" unless valx =~ /^[ \t]/ ) || ""
              valx = fold( YAML::escape( valx, esc_skip ) + "\"" ).chomp
              self << '"' + indent_text( valx, indt, false )
          else
              if block[0] == ?> 
                  valx = fold( valx ) 
              end
              #p [block, indt]
              self << block + indent_text( valx, indt )
          end
end

#options(opt = nil) ⇒ Object 



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# File 'lib/yaml/baseemitter.rb', line 13

def options( opt = nil )
    if opt
        @options[opt] || YAML::DEFAULTS[opt]
    else
        @options
    end
end

#options=(opt) ⇒ Object 



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# File 'lib/yaml/baseemitter.rb', line 21

def options=( opt )
    @options = opt
end

#seq(type, &e) ⇒ Object

Quick sequence



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# File 'lib/yaml/baseemitter.rb', line 200

def seq( type, &e )
    @seq_map = false
    val = Sequence.new
    e.call( val )
			self << "#{type} " if type.length.nonzero?

			#
			# Empty arrays
			#
			if val.length.zero?
				self << "[]"
			else
        # FIXME
        # if @buffer.length == 1 and options(:UseHeader) == false and type.length.zero? 
			    #     @headless = 1 
        # end

				#
				# Emit the key and value
				#
        val.each { |v|
            self << "\n"
            indent!
            self << "- "
            @seq_map = true if v.class == Hash
            v.to_yaml( :Emitter => self )
        }
			end
end

#seq_map_shortcut ⇒ Object 



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# File 'lib/yaml/baseemitter.rb', line 186

def seq_map_shortcut
    # FIXME: seq_map needs to work with the new anchoring system
    # if @seq_map
    #     @anchor_extras[@buffer.length - 1] = "\n" + indent
    #     @seq_map = false
    # else
        self << "\n"
        indent! 
    # end
end

#simple(value) ⇒ Object

Emit a simple, unqouted string



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# File 'lib/yaml/baseemitter.rb', line 81

def simple( value )
          @seq_map = false
          self << value.to_s
end

#single(value) ⇒ Object

Emit single-quoted string



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# File 'lib/yaml/baseemitter.rb', line 96

def single( value )
	"'#{value}'"
end