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Contents
module Redwood
class SearchManager
include Singleton
class ExpansionError < StandardError; end
def initialize fn
@fn = fn
@searches = {}
if File.exists? fn
IO.foreach(fn) do |l|
l =~ /^([^:]*): (.*)$/ or raise "can't parse #{fn} line #{l.inspect}"
@searches[$1] = $2
end
end
@modified = false
end
def all_searches; return @searches.keys.sort; end
def search_string_for name; return @searches[name]; end
def valid_name? name; name =~ /^[\w-]+$/; end
def name_format_hint; "letters, numbers, underscores and dashes only"; end
def add name, search_string
return unless valid_name? name
@searches[name] = search_string
@modified = true
end
def rename old, new
return unless @searches.has_key? old
search_string = @searches[old]
delete old if add new, search_string
end
def edit name, search_string
return unless @searches.has_key? name
@searches[name] = search_string
@modified = true
end
def delete name
return unless @searches.has_key? name
@searches.delete name
@modified = true
end
def expand search_string
expanded = search_string.dup
until (matches = expanded.scan(/\{([\w-]+)\}/).flatten).empty?
if !(unknown = matches - @searches.keys).empty?
error_message = "Unknown \"#{unknown.join('", "')}\" when expanding \"#{search_string}\""
elsif expanded.size >= 2048
error_message = "Check for infinite recursion in \"#{search_string}\""
end
if error_message
warn error_message
raise ExpansionError, error_message
end
matches.each { |n| expanded.gsub! "{#{n}}", "(#{@searches[n]})" if @searches.has_key? n }
end
return expanded
end
def save
return unless @modified
File.open(@fn, "w") { |f| @searches.sort.each { |(n, s)| f.puts "#{n}: #{s}" } }
@modified = false
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems