# povray completion by "David Necas (Yeti)" <yeti@physics.muni.cz>

have povray || have xpovray || have spovray &&
_povray()
{
    local cur prev povcur pfx oext defoext
    defoext=png # default output extension, if cannot be determined FIXME

    COMPREPLY=()
    _get_comp_words_by_ref povcur prev

    _expand || return 0

    case $povcur in
        [-+]I*)
            cur="${povcur#[-+]I}" # to confuse _filedir
            pfx="${povcur%"$cur"}"
            _filedir pov
            COMPREPLY=( ${COMPREPLY[@]/#/$pfx} )
            return 0
            ;;
        [-+]O*)
            # guess what output file type user may want
            case $( ( IFS=$'\n'; command grep '^[-+]F' <<<"${COMP_WORDS[*]}" ) ) in
                [-+]FN) oext=png ;;
                [-+]FP) oext=ppm ;;
                [-+]F[CT]) oext=tga ;;
                *) oext=$defoext ;;
            esac
            # complete filename corresponding to previously specified +I
            COMPREPLY=( $( ( IFS=$'\n'; command grep '^[-+]I' <<<"${COMP_WORDS[*]}" ) ) )
            COMPREPLY=( ${COMPREPLY[@]#[-+]I} )
            COMPREPLY=( ${COMPREPLY[@]/%.pov/.$oext} )
            cur="${povcur#[-+]O}" # to confuse _filedir
            pfx="${povcur%"$cur"}"
            _filedir $oext
            COMPREPLY=( ${COMPREPLY[@]/#/$pfx} )
            return 0
            ;;
        *.ini\[|*.ini\[*[^]]) # sections in .ini files
            cur="${povcur#*\[}"
            pfx="${povcur%\["$cur"}" # prefix == filename
            [ -r "$pfx" ] || return 0
            COMPREPLY=( $(sed -e 's/^[[:space:]]*\[\('"$cur"'[^]]*\]\).*$/\1/' \
                -e 't' -e 'd' -- "$pfx") )
            # to prevent [bar] expand to nothing.  can be done more easily?
            COMPREPLY=( "${COMPREPLY[@]/#/$pfx[}" )
            return 0
            ;;
        *)
            cur="$povcur"
            _filedir '?(ini|pov)'
            return 0
            ;;
    esac
} &&
complete -F _povray -o filenames povray xpovray spovray

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