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module CodeRay
module Encoders
class HTML
module Numbering # :nodoc:
def self.number! output, mode = :table, options = {}
return self unless mode
options = DEFAULT_OPTIONS.merge options
start = options[:line_number_start]
unless start.is_a? Integer
raise ArgumentError, "Invalid value %p for :line_number_start; Integer expected." % start
end
anchor_prefix = options[:line_number_anchors]
anchor_prefix = 'line' if anchor_prefix == true
anchor_prefix = anchor_prefix.to_s[/[\w-]+/] if anchor_prefix
anchoring =
if anchor_prefix
proc do |line|
line = line.to_s
anchor = anchor_prefix + line
"<a href=\"##{anchor}\" name=\"#{anchor}\">#{line}</a>"
end
else
proc { |line| line.to_s } # :to_s.to_proc in Ruby 1.8.7+
end
bold_every = options[:bold_every]
highlight_lines = options[:highlight_lines]
bolding =
if bold_every == false && highlight_lines == nil
anchoring
elsif highlight_lines.is_a? Enumerable
highlight_lines = highlight_lines.to_set
proc do |line|
if highlight_lines.include? line
"<strong class=\"highlighted\">#{anchoring[line]}</strong>" # highlighted line numbers in bold
else
anchoring[line]
end
end
elsif bold_every.is_a? Integer
raise ArgumentError, ":bolding can't be 0." if bold_every == 0
proc do |line|
if line % bold_every == 0
"<strong>#{anchoring[line]}</strong>" # every bold_every-th number in bold
else
anchoring[line]
end
end
else
raise ArgumentError, 'Invalid value %p for :bolding; false or Integer expected.' % bold_every
end
if position_of_last_newline = output.rindex(RUBY_VERSION >= '1.9' ? /\n/ : ?\n)
after_last_newline = output[position_of_last_newline + 1 .. -1]
ends_with_newline = after_last_newline[/\A(?:<\/span>)*\z/]
if ends_with_newline
line_count = output.count("\n")
else
line_count = output.count("\n") + 1
end
else
line_count = 1
end
case mode
when :inline
max_width = (start + line_count).to_s.size
line_number = start
output.gsub!(/^.*$\n?/) do |line|
line_number_text = bolding.call line_number
indent = ' ' * (max_width - line_number.to_s.size) # TODO: Optimize (10^x)
line_number += 1
"<span class=\"line-numbers\">#{indent}#{line_number_text}</span>#{line}"
end
when :table
line_numbers = (start ... start + line_count).map(&bolding).join("\n")
line_numbers << "\n"
line_numbers_table_template = Output::TABLE.apply('LINE_NUMBERS', line_numbers)
output.gsub!(/<\/div>\n/, '</div>')
output.wrap_in! line_numbers_table_template
output.wrapped_in = :div
when :list
raise NotImplementedError, 'The :list option is no longer available. Use :table.'
else
raise ArgumentError, 'Unknown value %p for mode: expected one of %p' %
[mode, [:table, :inline]]
end
output
end
end
end
end
end
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