Pretty-prints an XML document. This destroys whitespace in text nodes and will insert carriage returns and indentations.
TODO: Add an option to print attributes on new lines
Create a new pretty printer.
An object implementing '<<(String)', to which the output will be written.
An integer greater than 0. The indentation of each level will be this number of spaces. If this is < 1, the behavior of this object is undefined. Defaults to 2.
If true, the printer will insert whitespace before closing empty tags, thereby allowing Internet Explorer's XML parser to function. Defaults to false.
# File rexml/formatters/pretty.rb, line 29 def initialize( indentation=2, ie_hack=false ) @indentation = indentation @level = 0 @ie_hack = ie_hack @width = 80 @compact = false end
# File rexml/formatters/pretty.rb, line 101 def write_cdata( node, output) output << ' ' * @level super end
# File rexml/formatters/pretty.rb, line 96 def write_comment( node, output) output << ' ' * @level super end
# File rexml/formatters/pretty.rb, line 106 def write_document( node, output ) # Ok, this is a bit odd. All XML documents have an XML declaration, # but it may not write itself if the user didn't specifically add it, # either through the API or in the input document. If it doesn't write # itself, then we don't need a carriage return... which makes this # logic more complex. node.children.each { |child| next if child == node.children[-1] and child.instance_of?(Text) unless child == node.children[0] or child.instance_of?(Text) or (child == node.children[1] and !node.children[0].writethis) output << "\n" end write( child, output ) } end
# File rexml/formatters/pretty.rb, line 38 def write_element(node, output) output << ' '*@level output << "<#{node.expanded_name}" node.attributes.each_attribute do |attr| output << " " attr.write( output ) end unless node.attributes.empty? if node.children.empty? if @ie_hack output << " " end output << "/" else output << ">" # If compact and all children are text, and if the formatted output # is less than the specified width, then try to print everything on # one line skip = false if compact if node.children.inject(true) {|s,c| s & c.kind_of?(Text)} string = "" old_level = @level @level = 0 node.children.each { |child| write( child, string ) } @level = old_level if string.length < @width output << string skip = true end end end unless skip output << "\n" @level += @indentation node.children.each { |child| next if child.kind_of?(Text) and child.to_s.strip.length == 0 write( child, output ) output << "\n" } @level -= @indentation output << ' '*@level end output << "</#{node.expanded_name}" end output << ">" end