instiki/app/models/chunks/chunk.rb

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2005-01-15 21:26:54 +01:00
require 'digest/md5'
require 'uri/common'
# A chunk is a pattern of text that can be protected
# and interrogated by a renderer. Each Chunk class has a
# +pattern+ that states what sort of text it matches.
# Chunks are initalized by passing in the result of a
# match by its pattern.
module Chunk
class Abstract
attr_reader :text
def initialize(match_data) @text = match_data[0] end
# Find all the chunks of the given type in content
# Each time the pattern is matched, create a new
# chunk for it, and replace the occurance of the chunk
# in this content with its mask.
def self.apply_to(content)
content.gsub!( self.pattern ) do |match|
new_chunk = self.new($~)
content.chunks << new_chunk
new_chunk.mask(content)
end
end
def mask(content)
"chunk#{self.object_id}#{self.class.to_s.delete(':').downcase}chunk"
end
def revert(content)
content.sub!( Regexp.new(mask(content)), text )
end
def unmask(content)
self if revert(content)
end
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end
end