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#
# BaseEmitter
#
require 'yaml/constants'
require 'yaml/encoding'
require 'yaml/error'
module YAML
module BaseEmitter
def options( opt = nil )
if opt
@options[opt] || YAML::DEFAULTS[opt]
else
@options
end
end
def options=( opt )
@options = opt
end
#
# Emit binary data
#
def binary_base64( value )
self << "!binary "
self.node_text( [value].pack("m"), '|' )
end
#
# Emit plain, normal flowing text
#
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 = $&.to_i if block =~ /\d+/
if valx =~ /(\A\n*[ \t#]|^---\s+)/
indt = options(:Indent) unless indt.to_i > 0
block += indt.to_s
end
block +=
if valx =~ /\n\Z\n/
"+"
elsif valx =~ /\Z\n/
""
else
"-"
end
end
block += "\n"
if block[0] == ?"
esc_skip = ( "\t\n" unless valx =~ /^[ \t]/ ) || ""
valx = fold( YAML::escape( valx, esc_skip ) + "\"" ).chomp
self << '"' + indent_text( valx, indt, false )
else
if block[0] == ?>
valx = fold( valx )
end
#p [block, indt]
self << block + indent_text( valx, indt )
end
end
#
# Emit a simple, unqouted string
#
def simple( value )
@seq_map = false
self << value.to_s
end
#
# Emit double-quoted string
#
def double( value )
"\"#{YAML.escape( value )}\""
end
#
# Emit single-quoted string
#
def single( value )
"'#{value}'"
end
#
# Write a text block with the current indent
#
def indent_text( text, mod, first_line = true )
return "" if text.to_s.empty?
spacing = indent( mod )
text = text.gsub( /\A([^\n])/, "#{ spacing }\\1" ) if first_line
return text.gsub( /\n^([^\n])/, "\n#{spacing}\\1" )
end
#
# Write a current indent
#
def indent( mod = nil )
#p [ self.id, level, mod, :INDENT ]
if level <= 0
mod ||= 0
else
mod ||= options(:Indent)
mod += ( level - 1 ) * options(:Indent)
end
return " " * mod
end
#
# Add indent to the buffer
#
def indent!
self << indent
end
#
# Folding paragraphs within a column
#
def fold( value )
value.gsub( /(^[ \t]+.*$)|(\S.{0,#{options(:BestWidth) - 1}})(?:[ \t]+|(\n+(?=[ \t]|\Z))|$)/ ) do
$1 || $2 + ( $3 || "\n" )
end
end
#
# Quick mapping
#
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
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
#
# Quick sequence
#
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
end
#
# Emitter helper classes
#
class Mapping < Array
def add( k, v )
push [k, v]
end
end
class Sequence < Array
def add( v )
push v
end
end
end
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