class MapBuilder
attr_accessor :js_array
def initialize(div_name, provider = 'google')
@js_array = []
call_function "var mapstraction = new Mapstraction", div_name, provider.to_s
end
def add_point(*args)
opts = args.extract_options!
point = extract_coordinates(args)
call_function "var point = new LatLonPoint", point.lat, point.lng
call_function "var marker = new Marker", JSVar.new(:point)
if opts.has_key?(:message)
message = opts[:message].to_s
call_function "marker.setInfoBubble", escape_javascript(message)
end
call_function "mapstraction.addMarker", JSVar.new(:marker)
end
def auto_fit
call_function "mapstraction.autoCenterAndZoom"
end
def set_centre_and_zoom(zoom, *args)
point = extract_coordinates(args)
call_function "var point = new LatLonPoint", point.lat, point.lng
call_function "mapstraction.setCenterAndZoom", JSVar.new(:point), zoom.to_i
end
def to_js
self.js_array * "\n"
end
private
class LLPoint
attr_accessor :lat, :lng
def initialize(lat, lng)
self.lat = lat
self.lng = lng
end
end
class JSVar
attr_accessor :name
def initialize(name)
self.name = name
end
def to_json
self.name.to_s
end
end
def escape_javascript(javascript)
(javascript || '').gsub('\\','\0\0').gsub('</','<\/').gsub(/\r\n|\n|\r/, "\\n").gsub(/["']/) { |m| "\\#{m}" }
end
def call_function(name, *args)
append_javascript "#{name.strip}(#{prepare_js_args(args)});"
end
def assign_variable(name, value)
append_javascript "var #{name.to_s} = #{value};"
end
def append_javascript(val)
self.js_array << val
end
def prepare_js_args(args = [])
return args.compact.map { |a| a.to_json }.join(", ")
end
def extract_coordinates(args)
if args.first.respond_to?(:lat) && args.first.respond_to?(:lng)
return LLPoint.new(args.first.lat.to_f, args.first.lng.to_f)
else
return LLPoint.new(*args[0..1].map(&:to_f))
end
end
end
