has_xmldecl? returns true if there is an XML declaration on top level.
# File htree/traverse.rb, line 377 def has_xmldecl? children.each {|c| return true if c.xmldecl? } false end
root searches root element. If there is no element on top level, it raise HTree::Error. If there is two or more elements on top level, it raise HTree::Error.
# File htree/traverse.rb, line 368 def root es = [] children.each {|c| es << c if c.elem? } raise HTree::Error, "no element" if es.empty? raise HTree::Error, "multiple top elements" if 1 < es.length es[0] end
title searches title and return it as a text. It returns nil if not found.
title searchs following information.
<title>...</title> in HTML
<title>...</title> in RSS
<title>...</title> in Atom
# File htree/traverse.rb, line 284 def title e = find_element('title', '{http://www.w3.org/1999/xhtml}title', '{http://purl.org/rss/1.0/}title', '{http://my.netscape.com/rdf/simple/0.9/}title', '{http://www.w3.org/2005/Atom}title', '{http://purl.org/atom/ns#}title') e && e.extract_text end
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