moved apply_to from WikiContent to Chunk, so tha UriChunk can override it and decide when it

wants to match a URL and when it doesn't want to the in the way of Textile syntax

app/models/chunks/chunk.rb

@@ -11,10 +11,37 @@ module Chunk
 	attr_reader :text
 
 	def initialize(match_data) @text = match_data[0] end
-	def pre_mask() "chunk#{self.object_id}start " end
-	def post_mask() " chunk#{self.object_id}end" end
-	def mask(content) "chunk#{self.object_id}chunk" end
-	def revert(content) content.sub!( Regexp.new(mask(content)), text ) end
-	def unmask(content) self if revert(content) 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|	
+        content.chunks << self.new($~)
+        content.chunks.last.mask(content)
+      end
+    end
+	
+	def pre_mask() 
+	  "chunk#{self.object_id}start " 
+	end
+
+	def post_mask() 
+	  " chunk#{self.object_id}end"
+	end
+
+	def mask(content) 
+	  "chunk#{self.object_id}chunk"
+	end
+
+	def revert(content) 
+	  content.sub!( Regexp.new(mask(content)), text ) 
+	end
+
+	def unmask(content) 
+	  self if revert(content) 
+	end
+
   end
 end