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#
# Output classes and methods
#
require 'yaml/baseemitter'
require 'yaml/encoding'
module YAML
#
# Emit a set of values
#
class Emitter
include BaseEmitter
attr_accessor :options
def initialize( opts )
opts = {} if opts.class != Hash
@options = YAML::DEFAULTS.dup.update( opts )
@headless = 0
@seq_map = false
@anchors = {}
@anchor_extras = {}
@active_anchors = []
@level = -1
self.clear
end
def clear
@buffer = []
end
def level
@level
end
#
# Version string
#
def version_s
" %YAML:#{@options[:Version]}" if @options[:UseVersion]
end
#
# Header
#
def header
if @headless.nonzero?
""
else
"---#{version_s} "
end
end
#
# Concatenate to the buffer
#
def <<( str )
#p [ self.id, @level, str ]
@buffer.last << str
end
#
# Monitor objects and allow references
#
def start_object( oid )
@level += 1
@buffer.push( "" )
#p [ self.id, @level, :OPEN ]
idx = nil
if oid
if @anchors.has_key?( oid )
idx = @active_anchors.index( oid )
unless idx
idx = @active_anchors.length
af_str = "&#{@options[:AnchorFormat]} " % [ idx + 1 ]
af_str += @anchor_extras[ @anchors[ oid ] ].to_s
@buffer[ @anchors[ oid ] ][0,0] = af_str
@headless = 0 if @anchors[ oid ].zero?
end
idx += 1
@active_anchors.push( oid )
else
@anchors[ oid ] = @buffer.length - 1
end
end
return idx
end
#
# Output method
#
def end_object
@level -= 1
@buffer.push( "" )
#p [ self.id, @level, :END ]
if @level < 0
header + @buffer.to_s[@headless..-1].to_s
end
end
end
end
|
