# bash completion for xgamma(1)                            -*- shell-script -*-

_comp_cmd_xgamma()
{
    local cur prev words cword comp_args
    _comp_initialize -n : -- "$@" || return

    case "$prev" in
        -screen)
            local screens=$(xrandr --query 2>/dev/null | command sed -n \
                '/^Screen /s|^Screen \{1,\}\(.*\):.*$|\1|p' 2>/dev/null)
            _comp_compgen -- -W "$screens"
            return
            ;;
        -gamma | -rgamma | -ggamma | -bgamma)
            # expect f.f
            if [[ $cur && $cur != *.* ]]; then
                COMPREPLY=(.)
            fi
            _comp_compgen -aR -- -W "{0..9}"
            compopt -o nospace
            return
            ;;
        -display)
            # expect hostname:displaynumber.screennumber
            if [[ $cur == :* && $cur != :*.* ]]; then
                # FIXME: where to get local display numbers?
                local display=${cur#:}
                _comp_compgen -R -- -W "${display:-0}."
                compopt -o nospace
            elif [[ $cur == :*.* ]]; then
                # local screen numbers
                local screens=$(xrandr --query 2>/dev/null | command sed -ne \
                    '/^Screen /s|^Screen \{1,\}\(.*\):.*$|\1|p' 2>/dev/null)
                cur=${cur#:}
                _comp_compgen -P "${cur%.*}." -- -W '$screens'
            elif [[ $cur != *:* ]]; then
                # complete hostnames
                _comp_compgen_known_hosts -c -- "$cur"
                if [[ ! $cur ]]; then
                    COMPREPLY+=(:)
                fi
                compopt -o nospace
            fi
            # no display completion for remote hosts
            return
            ;;
    esac

    if [[ $cur == -* ]]; then
        _comp_compgen_help -- -help
        if [[ ${COMPREPLY-} ]]; then
            [[ $COMPREPLY == *= ]] && compopt -o nospace
            return
        fi
    fi
} &&
    complete -F _comp_cmd_xgamma xgamma

# ex: filetype=sh
