instiki/lib/chunks/literal.rb
2011-08-23 14:35:27 -05:00

40 lines
1.3 KiB
Ruby

require 'chunks/chunk'
# These are basic chunks that have a pattern and can be protected.
# They are used by rendering process to prevent wiki rendering
# occuring within literal areas such as <code> and <pre> blocks
# and within HTML tags.
module Literal
class AbstractLiteral < Chunk::Abstract
def initialize(match_data, content)
super
@unmask_text = @text
end
end
# A literal chunk that protects 'code' and 'pre' tags from wiki rendering.
class Pre < AbstractLiteral
PRE_BLOCKS = "a|pre|code|math"
PRE_PATTERN = Regexp.new('<('+PRE_BLOCKS+')\b[^>]*?(>.*?</\1>|/>)', Regexp::MULTILINE)
def self.pattern() PRE_PATTERN end
end
# A literal chunk that protects HTML tags from wiki rendering.
class Tags < AbstractLiteral
TAGS_PATTERN = Regexp.new('</?[-a-zA-Z:]+\b[^>]*?>', Regexp::MULTILINE)
def self.pattern() TAGS_PATTERN end
end
# A literal chunk that protects equations from wiki rendering.
class Math < AbstractLiteral
MATH_START = "(?:\\\\\\[|\\${1,2}|\\\\begin\\{equation\\})"
MATH_END = "(?:\\\\\\]|\\${1,2}|\\\\end\\{equation\\})"
MATH_PATTERN = Regexp.new( '(' + MATH_START + "(?:\\\\\\$|(?!\\$|\\\\\\]|\\\\end\\{equation\\}).)+?" + MATH_END + ')', Regexp::MULTILINE)
def self.pattern() MATH_PATTERN end
end
end