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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.
#
# [+cssclass+] CSS class for the wrapping <tt><div></tt> tag
# (default: 'highlight').
# [+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(
cssclass: 'highlight',
lineanchors: false,
lineanchorsid: 'L'
)
@cssclass = cssclass
@lineanchors = lineanchors
@lineanchorsid = lineanchorsid
end
def render(tokens)
data = process_tokens(tokens)
wrap_lines(data[:code])
end
alias_method :format, :render
private
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?
{ code: rendered }
end
def wrap_lines(lines)
if @lineanchors
lines = lines.each_with_index.map do |line, index|
number = index + @linenostart
"<span id=\"#{@lineanchorsid}#{number}\" class=\"line\">#{line}" \
'</span>'
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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