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# By Rob Aldred (http://robaldred.co.uk)
# Based on idea by Nathan Weizenbaum (http://nex-3.com)
# MIT License (http://www.opensource.org/licenses/mit-license.php)
#
# A CodeRay encoder that outputs code highlighted for a color terminal.
# Check out http://robaldred.co.uk
module CodeRay
module Encoders
class Terminal < Encoder
register_for :terminal
TOKEN_COLORS = {
:attribute_name => '33',
:attribute_name_fat => '33',
:attribute_value => '31',
:attribute_value_fat => '31',
:bin => '1;35',
:char => {:self => '36', :delimiter => '34'},
:class => '1;35',
:class_variable => '36',
:color => '32',
:comment => '37',
:constant => ['34', '4'],
:definition => '1;32',
:directive => ['32', '4'],
:doc => '46',
:doc_string => ['31', '4'],
:entity => '33',
:error => ['1;33', '41'],
:exception => '1;31',
:float => '1;35',
:function => '1;34',
:global_variable => '42',
:hex => '1;36',
:include => '33',
:integer => '1;34',
:interpreted => '1;35',
:label => '1;4',
:local_variable => '33',
:oct => '1;35',
:operator_name => '1;29',
:pre_constant => '1;36',
:pre_type => '1;30',
:predefined => ['4', '1;34'],
:preprocessor => '36',
:regexp => {
:content => '31',
:delimiter => '1;29',
:modifier => '35',
:function => '1;29'
},
:reserved => '1;31',
:shell => {:self => '42', :content => '1;29'},
:string => '32',
:symbol => '1;32',
:tag => '34',
:tag_fat => '1;34',
:tag_special => ['34', '4'],
:type => '1;34',
:variable => '34'
}
TOKEN_COLORS[:method] = TOKEN_COLORS[:function]
TOKEN_COLORS[:open] = TOKEN_COLORS[:close] = TOKEN_COLORS[:nesting_delimiter] = TOKEN_COLORS[:escape] = TOKEN_COLORS[:delimiter]
protected
def setup(options)
super
@opened = [nil]
@subcolors = nil
end
def finish(options)
super
end
def token text, type
case text
when nil
# raise 'Token with nil as text was given: %p' % [[text, type]]
when String
if color = (@subcolors || TOKEN_COLORS)[type]
color = color[:self] || return if Hash === color
@out << col(color) + text.gsub("\n", col(0) + "\n" + col(color)) + col(0)
@out << col(@subcolors[:self]) if @subcolors && @subcolors[:self]
else
@out << text
end
# token groups, eg. strings
when :open
@opened[0] = type
if color = TOKEN_COLORS[type]
if Hash === color
@subcolors = color
@out << col(color[:self]) if color[:self]
else
@subcolors = {}
@out << col(color)
end
end
@opened << type
when :close
if @opened.empty?
# nothing to close
else
if (@subcolors || {})[:self]
@out << col(0)
end
@subcolors = nil
@opened.pop
end
# whole lines to be highlighted, eg. a added/modified/deleted lines in a diff
when :begin_line
when :end_line
else
raise 'unknown token kind: %p' % [text]
end
end
private
def col(color)
Array(color).map { |c| "\e[#{c}m" }.join
end
end
end
end
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