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# Copyright (C) 2004 - 2012 Gregoire Lejeune <gregoire.lejeune@free.fr>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
class AttributeException < RuntimeError
end
class GraphViz
class Attrs
attr_accessor :data
def initialize( gviz, name, attributes )
@name = name
@attributes = attributes
@data = Hash::new( )
@graphviz = gviz
end
def each
@data.each do |k, v|
yield(k, v)
end
end
def to_h
@data.clone
end
def []( key )
if key.class == Hash
key.each do |k, v|
self[k] = v
end
else
@data[key.to_s]
end
end
def []=( key, value )
unless @attributes.keys.include?( key.to_s )
raise ArgumentError, "#{@name} attribute '#{key.to_s}' invalid"
end
if value.nil?
warn "Value for attribute `#{key}` can't be null"
return
end
begin
value = GraphViz::Types.const_get(@attributes[key.to_s]).new( value )
rescue => e
raise AttributeException, "Invalide value `#{value}` for attribute `#{key}` : #{e}"
end
if value
@data[key.to_s] = value
@graphviz.set_position( @name, key.to_s, @data[key.to_s] ) if @graphviz
end
end
end
end
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