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Contents
require 'rexml/document'
# Custom REXML formatter that removes blank lines, extra whitespace,
# and ensures lines are indented properly.
#
# This class is used for pre-4.4 Kinetic Task servers to format tree xml
# content when exporting trees and routines.
class Prettier < REXML::Formatters::Default
def initialize( indentation = 4 )
@indentation = indentation
@level = 0
end
protected
def write_element( node, output )
output << "<#{node.expanded_name}"
att = node.attributes
class <<att
def each_attribute_sorted(&b)
to_enum(:each_attribute).sort_by {|x| x.name}.each(&b)
end
end
node.attributes.each_attribute_sorted do |attr|
output << " "
attr.write( output )
end unless node.attributes.empty?
if node.children.empty?
output << "></#{node.expanded_name}>"
else
element_nodes = node.children.select { |child| child.kind_of?(REXML::Element) }.size
processed_element_nodes = 0
output << ">"
@level += @indentation
node.children.each_index { |index|
child = node.children[index]
next if child.kind_of?(REXML::Text) && node.expanded_name != "parameter" && child.to_s.strip.length == 0
if child.kind_of?(REXML::Element) then
processed_element_nodes += 1
write_indent_level(output, true)
end
write( child, output )
}
@level -= @indentation if @level >= @indentation
write_indent_level(output, true) if element_nodes > 0 && processed_element_nodes == element_nodes
output << "</#{node.expanded_name}>"
end
end
private
def write_indent_level(output, newline = false)
output << "\n" if newline
output << ' ' * @level
end
end
Version data entries
37 entries across 37 versions & 1 rubygems