Class: Metrocot::OneOrMorePattern

Inherits:
BasePattern show all
Defined in:
lib/metrocot.rb

Overview

matches one or more occurences of some other pattern

Instance Attribute Summary

Attributes inherited from BasePattern

#matched, #metrocot, #name, #node_scraper, #pattern_no, #pred, #source, #succ

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BasePattern

#default_scanner, #dump_match_map, #log, #log_match_data, #optional, #with_scanned_match_data

Constructor Details

#initialize(repeatee) ⇒ OneOrMorePattern

Returns a new instance of OneOrMorePattern.



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# File 'lib/metrocot.rb', line 431

def initialize(repeatee) 
	super( nil )
	@repeatee = repeatee
end

Class Method Details

.parse(s) ⇒ Object 



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# File 'lib/metrocot.rb', line 437

def self.parse(s)
	raise "not implemented"
end

Instance Method Details

#consume_remaining_matches(match_range, match_map, matches) ⇒ Object 



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# File 'lib/metrocot.rb', line 463

def consume_remaining_matches( match_range, match_map, matches )

	log("consuming remaining matches in #{match_range}")
	@repeatee.each_match( match_range, match_map ) { |r_match_range, r_match_map|
		matches << r_match_range.hnodes[r_match_range.start_index ... r_match_range.end_index]
		last_match_range = consume_remaining_matches( match_range.tail( r_match_range.end_index, r_match_range.end_offset ), match_map, matches )  
		return last_match_range || r_match_range
	}
	return nil

end

#description ⇒ Object 



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# File 'lib/metrocot.rb', line 447

def description
	"one+ ##{pattern_no}"
end

#dump(level, out) ⇒ Object 



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# File 'lib/metrocot.rb', line 452

def dump( level, out ) 
	out << "  " * level + "one or more p=#{priority}\n"
	@repeatee.dump( level + 1, out )
end

#each_match(match_range, match_map) ⇒ Object 



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# File 'lib/metrocot.rb', line 476

def each_match( match_range, match_map )

	super(match_range, match_map)

	log("looking for first match in #{match_range}")
	@repeatee.each_match( match_range, match_map ) { |first_match_range, first_match_map|
		results = []
		last_match_range = consume_remaining_matches( match_range.tail( first_match_range.end_index, first_match_range.end_offset ), match_map, results ) 
			
		combined_match_range = if last_match_range
			match_range.crop( 
					first_match_range.start_index, first_match_range.start_offset, 
					last_match_range.end_index, last_match_range.end_offset
			)
		else
			first_match_range
		end
	
		log("combined match in #{combined_match_range}")

		result = with_scanned_match_data( match_map, results ) { |match_map|
			yield( combined_match_range, results )
		}

		if result 
			log("one+ match done with #{result}")
			return result 
		else
			log("one+ match not done")
		end
	}
	
	return nil
end

#priority ⇒ Object 



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# File 'lib/metrocot.rb', line 458

def priority
	@repeatee.priority
end

#repeatee ⇒ Object 



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# File 'lib/metrocot.rb', line 442

def repeatee
	@repeatee
end