text: # Copyright 2015 Sean Vig
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from dataclasses import dataclass
  from typing import Iterator
  import xml.etree.ElementTree as ET
  
  from .argument import Argument
  from .description import Description
  from .method import Method
  from .printer import Printer
  
  
  @dataclass(frozen=True)
  class Event(Method):
      """Scanner for event objects (server-side method)
  
      Required attributes: `name`
  
      Optional attributes: `since`
  
      Child elements: `description` and `arg``
      """
  
      method_type = "event"
  
      @classmethod
      def parse(cls, element: ET.Element) -> "Event":
          name = cls.parse_attribute(element, "name")
          if name in ("global", "import"):
              name += "_"
  
          return cls(
              name=name,
              since=cls.parse_optional_attribute(element, "since"),
              description=cls.parse_optional_child(element, Description, "description"),
              arg=cls.parse_repeated_child(element, Argument, "arg"),
          )
  
      @property
      def method_args(self) -> Iterator[str]:
          """Generator of the arguments to the method
  
          All arguments to be sent to `._post_event` must be passed in
          """
          for arg in self.arg:
              yield arg.name
  
      def output_doc_params(self, printer: Printer) -> None:
          """Aguments documented as parameters
  
          All arguments are event parameters.
          """
          for arg in self.arg:
              arg.output_doc_param(printer)
  
      def output_body(self, printer: Printer, opcode: int) -> None:
          """Output the body of the event to the printer"""
          args = ", ".join([str(opcode)] + list(self.method_args))
          printer("self._post_event({})".format(args))
  