Sha256: a592b52652d416633cc2bad556d154ac85c14e21ec4b5433b7f0992e23584d28
Contents?: true
Size: 1008 Bytes
Versions: 7
Compression:
Stored size: 1008 Bytes
Contents
require "strscan"
module HtmlBeautifier
class Parser
def initialize
@maps = []
yield self if block_given?
end
def map(pattern, method)
@maps << [pattern, method]
end
def scan(subject, receiver)
@scanner = StringScanner.new(subject)
dispatch(receiver) until @scanner.eos?
end
def source_so_far
@scanner.string[0...@scanner.pos]
end
def source_line_number
[source_so_far.chomp.split(%r{\n}).count, 1].max
end
private
def dispatch(receiver)
_, method = @maps.find { |pattern, _| @scanner.scan(pattern) }
raise "Unmatched sequence" unless method
receiver.__send__(method, *extract_params(@scanner))
rescue => ex
raise "#{ex.message} on line #{source_line_number}"
end
def extract_params(scanner)
return [scanner[0]] unless scanner[1]
params = []
i = 1
while scanner[i]
params << scanner[i]
i += 1
end
params
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems