Class: Metrocot::OptSpacePattern

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

Overview

matches zero or more white spaces

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, #dump_match_map, #log, #log_match_data, #with_scanned_match_data

Constructor Details

#initialize ⇒ OptSpacePattern

Returns a new instance of OptSpacePattern.



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# File 'lib/metrocot.rb', line 359

def initialize
	super(" ")
end

Class Method Details

.parse(s) ⇒ Object 



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# File 'lib/metrocot.rb', line 371

def self.parse( s ) 
	return nil unless s[0..0] == " "
	OptSpacePattern.new
end

Instance Method Details

#description ⇒ Object 



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# File 'lib/metrocot.rb', line 363

def description
	"spaces"
end

#each_match(match_range, match_map) ⇒ Object 



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# File 'lib/metrocot.rb', line 380

def each_match( match_range, match_map )

	result = nil

	super(match_range, match_map)

	match_start_index  = match_range.start_index
	match_start_offset = match_range.start_offset
	match_end_index    = match_range.start_index
	match_end_offset   = match_range.start_offset

	raise "negative range #{match_range}" if match_start_index > match_end_index
	raise "negative range #{match_range}" if match_start_index == match_end_index && match_start_offset > match_end_offset

	# consume rest of first text node  

	hnodes = match_range.hnodes
	hnode_text = nil

	if hnodes[match_start_index] && hnodes[match_start_index].text?
	
		hnode_text = hnodes[match_start_index].inner_text
		while match_end_offset < hnode_text.size && (/^\s+$/.=== hnode_text[match_start_offset .. match_end_offset])
			match_end_offset += 1
		end
			
		if match_end_offset >= match_start_offset 
			if match_end_offset >= hnode_text.size
				log( "matched entire string of #{match_end_offset - match_start_offset} spaces" )
			else
				log( "matched first #{match_end_offset - match_start_offset} leading spaces" )
			end
		end
	end

	sp_match_range = match_range.crop( match_start_index, match_start_offset, match_end_index, match_end_offset )

	result = with_scanned_match_data( match_map, hnodes[match_start_index ... match_end_index] ) { |match_map|
		yield( sp_match_range, match_map ) 
	}
	
	result
end

#optional ⇒ Object 



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# File 'lib/metrocot.rb', line 367

def optional
	true
end

#priority ⇒ Object 



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# File 'lib/metrocot.rb', line 376

def priority
	-8
end