efl/src/wayland_protocol/efl-hints.xml

<protocol name="efl_hints">

  <interface name="efl_hints" version="1">
    <enum name="aspect">
      <entry name="none" value="0"/>
      <entry name="neither" value="1"/>
      <entry name="horizontal" value="2"/>
      <entry name="vertical" value="3"/>
      <entry name="both" value="4"/>
    </enum>
    <request name="set_aspect">
      <arg name="surface" type="object" interface="xdg_surface"/>
      <arg name="width" type="uint"/>
      <arg name="height" type="uint"/>
      <arg name="aspect" type="uint" enum="aspect"/>
    </request>
    <request name="set_weight">
      <arg name="surface" type="object" interface="xdg_surface"/>
      <arg name="width" type="int"/>
      <arg name="height" type="int"/>
    </request>
  </interface>

</protocol>