# -*- coding: utf-8 -*- #

module Rouge
  module Lexers
    class XML < RegexLexer
      desc %q(<desc for="this-lexer">XML</desc>)
      tag 'xml'
      filenames *%w(*.xml *.xsl *.rss *.xslt *.xsd *.wsdl)
      mimetypes *%w(
        text/xml
        application/xml
        image/svg+xml
        application/rss+xml
        application/atom+xml
      )

      def self.analyze_text(text)
        return 0.9 if text.doctype?
        return 0.8 if text =~ /\A<\?xml\b/
        start = text[0..1000]
        return 0.6 if start =~ %r(<xml\b)
        return 0.3 if start =~ %r(<.+?>.*?</.+?>)m
      end

      state :root do
        rule /[^<&]+/, Text
        rule /&\S*?;/, Name::Entity
        rule /<!\[CDATA\[.*?\]\]\>/, Comment::Preproc
        rule /<!--/, Comment, :comment
        rule /<\?.*?\?>/, Comment::Preproc
        rule /<![^>]*>/, Comment::Preproc

        # open tags
        rule %r(<\s*[\w:.-]+)m, Name::Tag, :tag

        # self-closing tags
        rule %r(<\s*/\s*[\w:.-]+\s*>)m, Name::Tag
      end

      state :comment do
        rule /[^-]+/m, Comment
        rule /-->/, Comment, :pop!
        rule /-/, Comment
      end

      state :tag do
        rule /\s+/m, Text
        rule /[\w.:-]+\s*=/m, Name::Attribute, :attr
        rule %r(/?\s*>), Name::Tag, :pop!
      end

      state :attr do
        rule /\s+/m, Text
        rule /".*?"|'.*?'|[^\s>]+/, Str, :pop!
      end
    end
  end
end
