noteweb: Rendering bird field notes for the Web

See the notes about overall structure in Section 23.19, “MonthCell.__birdForm(): Render one BirdForm”.

# - - -   M o n t h C e l l . _ _ s i n g le S i g h t i n g

    def __singleSighting ( self, parent, birdForm ):
        '''Render the single-sighting case of a bird form.

          [ (parent is an et.element) and
            (birdForm is a birdnotes.BirdForm instance with
            one sighting) ->
              parent  +:=  (that sighting's age-sex-group) +
                  (that sighting's loc-group, if any) +
                  (that sighting's sighting-notes, if any) ]
        '''

See Section 23.26, “MonthCell.__ageSexGroup(): Render age-sex-group content”.

        #-- 1 --
        # [ sight  :=  the first child sighting of birdForm ]
        sight  =  birdForm[0]

        #-- 2 --
        # [ if sight.ageSexGroup is not None ->
        #     parent  +:=  XHTML rendering of sight.ageSexGroup
        #   else -> I ]
        if sight.ageSexGroup is not None:
            self.__ageSexGroup ( parent, sight.ageSexGroup )

See Section 23.22, “MonthCell.__locGroup(): Render a locality group”.

        #-- 3 --
        # [ paretn  +:=  XHTML rendering of sight's effective locality ]
        self.__locGroup ( parent, sight.getLocGroup() )

See Section 23.23, “MonthCell.__sightNotes(): Render a sighting notes group”.

        #-- 4 --
        # [ if sight.sightNotes is not None ->
        #     parent  +:=  XHTML rendering of sight.sightNotes
        #   else -> I ]
        if sight.sightNotes is not None:
            self.__sightNotes ( parent, sight.sightNotes )