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require 'cgi'
module Rouge
module Formatters
class HTMLGitlab < Rouge::Formatter
tag 'html_gitlab'
# Creates a new <tt>Rouge::Formatter::HTMLGitlab</tt> instance.
#
# [+nowrap+] If set to True, don't wrap the output at all, not
# even inside a <tt><pre></tt> tag (default: false).
# [+cssclass+] CSS class for the wrapping <tt><div></tt> 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 <tt><pre></tt> 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').
def initialize(
nowrap: false,
cssclass: 'highlight',
linenos: nil,
linenostart: 1,
lineanchors: false,
lineanchorsid: 'L'
)
@nowrap = nowrap
@cssclass = cssclass
@linenos = linenos
@linenostart = linenostart
@lineanchors = lineanchors
@lineanchorsid = lineanchorsid
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 << "<pre class=\"#{@cssclass}\"><code>" unless @nowrap
html << wrap_lines(data[:code])
html << "</code></pre>\n" unless @nowrap
html
end
def render_tableized(tokens)
data = process_tokens(tokens)
html = ''
html << "<div class=\"#{@cssclass}\">" unless @nowrap
html << '<table><tbody>'
html << "<td class=\"linenos\"><pre>"
html << wrap_linenos(data[:numbers])
html << '</pre></td>'
html << "<td class=\"lines\"><pre><code>"
html << wrap_lines(data[:code])
html << '</code></pre></td>'
html << '</tbody></table>'
html << '</div>' unless @nowrap
html
end
def process_tokens(tokens)
rendered = []
current_line = ''
tokens.each do |tok, val|
# In the case of multi-line values (e.g. comments), we need to apply
# styling to each line since span elements are inline.
val.lines.each do |line|
stripped = line.chomp
current_line << span(tok, stripped)
if line.end_with?("\n")
rendered << current_line
current_line = ''
end
end
end
# Add leftover text
rendered << current_line if current_line.present?
num_lines = rendered.size
numbers = (@linenostart..num_lines + @linenostart - 1).to_a
{ numbers: numbers, code: rendered }
end
def wrap_linenos(numbers)
numbers.join("\n")
end
def wrap_lines(lines)
if @lineanchors
lines = lines.each_with_index.map do |line, index|
number = index + @linenostart
if @linenos == 'inline'
"<a name=\"L#{number}\"></a>" \
"<span class=\"linenos\">#{number}</span>" \
"<span id=\"#{@lineanchorsid}#{number}\" class=\"line\">#{line}" \
'</span>'
else
"<span id=\"#{@lineanchorsid}#{number}\" class=\"line\">#{line}" \
'</span>'
end
end
elsif @linenos == 'inline'
lines = lines.each_with_index.map do |line, index|
number = index + @linenostart
"<span class=\"linenos\">#{number}</span>#{line}"
end
end
lines.join("\n")
end
def span(tok, val)
# http://stackoverflow.com/a/1600584/2587286
val = CGI.escapeHTML(val)
if tok.shortname.empty?
val
else
"<span class=\"#{tok.shortname}\">#{val}</span>"
end
end
end
end
end
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