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`%||%` <- function(a, b) if (is.null(a)) b else a
is_named <- function(x) {
all(has_names(x))
}
has_names <- function(x) {
nms <- names(x)
if (is.null(nms)) {
rep(FALSE, length(x))
} else {
!(is.na(nms) | nms == "")
}
}
# non smart quote version of sQuote
quote_str <- function(x, quote = "\"") {
if (!length(x)) {
return(character(0))
}
paste0(quote, x, quote)
}
# Format the C bitwise flags for display in Rd. The input object is a named
# integer vector with a 'descriptions' character vector attribute that
# corresponds to each flag.
describe_options <- function(x) {
paste0(
"\\describe{\n",
paste0(" \\item{", names(x), "}{", attr(x, "descriptions"), "}", collapse = "\n"),
"\n}"
)
}
s_quote <- function(x) paste0("'", x, "'")
# Similar to match.arg, but returns character() with NULL or empty input and
# errors if any of the inputs are not found (fixing
# https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=16659)
parse_options <- function(arg, options, error_call = caller_env()) {
if (is.numeric(arg)) {
return(as.integer(arg))
}
if (is.null(arg) || !any(nzchar(arg))) {
return(0L)
}
# set duplicates.ok = TRUE so any duplicates are counted differently than
# non-matches, then take only unique results
i <- pmatch(arg, names(options), duplicates.ok = TRUE)
if (anyNA(i)) {
cli::cli_abort(c(
x = "{.arg options} {.val {arg[is.na(i)][1L]}} is not a valid option.",
i = "Valid options are one of {.or {.val {names(options)}}}.",
i = "See {.help [read_html](xml2::read_html)} for all options."
),
call = error_call)
}
sum(options[unique(i)])
}
#' Get path to a xml2 example
#'
#' xml2 comes bundled with a number of sample files in its \sQuote{inst/extdata}
#' directory. This function makes them easy to access.
#' @param path Name of file. If `NULL`, the example files will be listed.
#' @export
xml2_example <- function(path = NULL) {
if (is.null(path)) {
dir(system.file("extdata", package = "xml2"))
} else {
system.file("extdata", path, package = "xml2", mustWork = TRUE)
}
}
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