#'

#' ozmap("country")

#' ozmap("abs_ced")  ## commonwealth (national) electoral divisions

  plot_sfc(x, add = add, ...)

plot_bbox <- function(x, ...) {

  xr <- x[c("xmin", "xmax")]

  yr <- x[c("ymin", "ymax")]

  plot(xr, yr, type = "n", axes = FALSE, xlab = "", ylab = "", ...)

}

## from sf

# person(given = "Edzer",

#        family = "Pebesma",

#        role = c("ctb"),

#        comment = c(ORCID = "0000-0001-8049-7069"))

#' @importFrom graphics plot polypath

plot_sfc <- function(x, y, ..., lty = 1, lwd = 1, col = NA, border = 1, add = FALSE, rule = "evenodd") {

  # FIXME: take care of lend, ljoin, xpd, and lmitre

  stopifnot(missing(y))

  geom <- x[[attr(x, "sf_column")]]

  bb <- attr(geom, "bbox")

  prj <- attr(geom, "crs")$proj4string

  if (!"asp" %in% names(list(...))) {

    asp <- 1

    if (grepl("longlat", prj) || grepl("4326", prj)) {

      asp <- 1/cos(mean(bb[c("ymin", "ymax")]) * pi/180)

    }

  } else {

    asp <- list(...)$asp

  }

  if (! add)

    plot_bbox(bb, asp = asp)

  x <- geom

  lty = rep(lty, length.out = length(x))

  lwd = rep(lwd, length.out = length(x))

  col = rep(col, length.out = length(x))

  border = rep(border, length.out = length(x))

  #non_empty = ! st_is_empty(x)

  lapply(seq_along(x), function(i) {

      lapply(x[[i]], function(L) {

        polypath(sf_p_bind(L), border = border[i], lty = lty[i], lwd = lwd[i], col = col[i], rule = rule)

      })})

  invisible(NULL)

}

sf_p_bind <- function(lst) {

  if (length(lst) == 1)

    lst[[1]]

  else {

    ret = vector("list", length(lst) * 2 - 1)

    ret[seq(1, length(lst) * 2 - 1, by = 2)] = lst # odd elements

    ret[seq(2, length(lst) * 2 - 1, by = 2)] = NA  # even elements

    do.call(rbind, ret) # replicates the NA to form an NA row

  }

}