instiki/lib/maruku/structures_iterators.rb

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2007-01-22 15:36:51 +01:00
#--
# Copyright (C) 2006 Andrea Censi <andrea (at) rubyforge.org>
#
# This file is part of Maruku.
#
# Maruku 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.
#
# Maruku 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 Maruku; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#++
module MaRuKu
class MDElement
# Yields to each element of specified node_type
# All elements if e_node_type is nil.
def each_element(e_node_type=nil, &block)
@children.each do |c|
if c.kind_of? MDElement
if (not e_node_type) || (e_node_type == c.node_type)
block.call c
end
c.each_element(e_node_type, &block)
end
end
end
# Apply passed block to each String in the hierarchy.
def replace_each_string(&block)
for c in @children
if c.kind_of? MDElement
c.replace_each_string(&block)
end
end
processed = []
until @children.empty?
c = @children.shift
if c.kind_of? String
result = block.call(c)
[*result].each do |e| processed << e end
else
processed << c
end
end
@children = processed
end
end
end