tag
+ # (default: 'highlight').
+ # [+linenos+] If set to 'table', output line numbers as a table
+ # with two cells, one containing the line numbers,
+ # the other the whole code. This is copy paste friendly,
+ # but may cause alignment problems with some browsers
+ # or fonts. If set to 'inline', the line numbers will
+ # be integrated in the
tag that contains
+ # the code (default: nil).
+ # [+linenostart+] The line number for the first line (default: 1).
+ # [+lineanchors+] If set to true the formatter will wrap each output
+ # line in an anchor tag with a name of L-linenumber.
+ # This allows easy linking to certain lines
+ # (default: false).
+ # [+lineanchorsid+] If lineanchors is true the name of the anchors can
+ # be changed with lineanchorsid to e.g. foo-linenumber
+ # (default: 'L').
+ # [+anchorlinenos+] If set to true, will wrap line numbers in
+ # tags. Used in combination with linenos and lineanchors
+ # (default: false).
+ # [+inline_theme+] Inline CSS styles for the
tag (default: false).
+ def initialize(
+ nowrap: false,
+ cssclass: 'highlight',
+ linenos: nil,
+ linenostart: 1,
+ lineanchors: false,
+ lineanchorsid: 'L',
+ anchorlinenos: false,
+ inline_theme: nil
+ )
+ @nowrap = nowrap
+ @cssclass = cssclass
+ @linenos = linenos
+ @linenostart = linenostart
+ @lineanchors = lineanchors
+ @lineanchorsid = lineanchorsid
+ @anchorlinenos = anchorlinenos
+ @inline_theme = Theme.find(@inline_theme).new if @inline_theme.is_a?(String)
+ end
+
+ def render(tokens)
+ case @linenos
+ when 'table'
+ render_tableized(tokens)
+ when 'inline'
+ render_untableized(tokens)
+ else
+ render_untableized(tokens)
+ end
+ end
+
+ alias_method :format, :render
+
+ private
+
+ def render_untableized(tokens)
+ data = process_tokens(tokens)
+
+ html = ''
+ html << "" unless @nowrap
+ html << wrap_lines(data[:code])
+ html << "
\n" unless @nowrap
+ html
+ end
+
+ def render_tableized(tokens)
+ data = process_tokens(tokens)
+
+ html = ''
+ html << "" unless @nowrap
+ html << '
'
+ html << ""
+ html << wrap_linenos(data[:numbers])
+ html << ' | '
+ html << ""
+ html << wrap_lines(data[:code])
+ html << '
| '
+ html << '
'
+ html << '
' unless @nowrap
+ html
+ end
+
+ def process_tokens(tokens)
+ num_lines = 0
+ last_val = ''
+ rendered = ''
+
+ tokens.each do |tok, val|
+ last_val = val
+ num_lines += val.scan(/\n/).size
+ rendered << span(tok, val)
+ end
+
+ numbers = (@linenostart..num_lines + @linenostart - 1).to_a
+
+ { numbers: numbers, code: rendered }
+ end
+
+ def wrap_linenos(numbers)
+ if @anchorlinenos
+ numbers.map! do |number|
+ "#{number}"
+ end
+ end
+ numbers.join("\n")
+ end
+
+ def wrap_lines(rendered)
+ if @lineanchors
+ lines = rendered.split("\n")
+ lines = lines.each_with_index.map do |line, index|
+ number = index + @linenostart
+
+ if @linenos == 'inline'
+ "" \
+ "#{number}" \
+ "#{line}" \
+ ''
+ else
+ "#{line}" \
+ ''
+ end
+ end
+ lines.join("\n")
+ else
+ if @linenos == 'inline'
+ lines = rendered.split("\n")
+ lines = lines.each_with_index.map do |line, index|
+ number = index + @linenostart
+ "#{number}#{line}"
+ end
+ lines.join("\n")
+ else
+ rendered
+ end
+ end
+ end
+
+ def span(tok, val)
+ # http://stackoverflow.com/a/1600584/2587286
+ val = CGI.escapeHTML(val)
+
+ if tok.shortname.empty?
+ val
+ else
+ if @inline_theme
+ rules = @inline_theme.style_for(tok).rendered_rules
+ "#{val}"
+ else
+ "#{val}"
+ end
+ end
+ end
+ end
+ end
+end