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# @staticimports pkg:staticimports
# is_installed get_package_version system_file
# register_upgrade_message
# %||% is_string
# read_utf8
switch_version <- function(
version,
five = default,
four = default,
three = default,
default = NULL
) {
if (is_bs_theme(version)) {
version <- theme_version(version)
}
version <- as.character(version)
if (isTRUE(version %in% c("4-3", "4+3"))) {
warning("Version ", version, " has been renamed to 4. Please use 4 instead")
version <- "4"
}
switch(
version,
`5` = five,
`4` = four,
`3` = three,
stop("Didn't recognize Bootstrap version: ", version, call. = FALSE)
)
}
get_exact_version <- function(version) {
switch_version(
version,
five = version_bs5,
four = version_bs4,
three = version_bs3
)
}
path_inst <- function(...) {
files <- system_file(..., package = "bslib")
files_found <- files != ""
if (all(files_found)) return(files)
files_not_found <- file.path(...)[!files_found]
stop(
"bslib file not found: '",
files_not_found,
"'",
call. = FALSE
)
}
path_lib <- function(...) path_inst("lib", ...)
is_shiny_app <- function() {
# Make sure to not load shiny as a side-effect of calling this function.
isNamespaceLoaded("shiny") && shiny::isRunning()
}
is_hosted_app <- function() {
nzchar(Sys.getenv("SHINY_SERVER_VERSION")) && is_shiny_app()
}
is_shiny_runtime <- function() {
if (!is_installed("knitr")) return(FALSE)
isTRUE(grepl("^shiny", knitr::opts_knit$get("rmarkdown.runtime")))
}
register_runtime_package_check <- function(feature, pkg, version) {
msg <- sprintf(
"%s is designed to work with %s %s or higher",
feature,
pkg,
version
)
if (isNamespaceLoaded(pkg) && !is_installed(pkg, version)) {
warning(msg, call. = FALSE)
}
setHook(
packageEvent(pkg, "onLoad"),
function(...) {
if (!is_installed(pkg, version)) warning(msg, call. = FALSE)
}
)
}
add_class <- function(x, y) {
class(x) <- unique(c(y, oldClass(x)))
x
}
dropNulls <- function(x) {
x[!vapply(x, is.null, FUN.VALUE = logical(1))]
}
names2 <- function(x) {
names(x) %||% rep.int("", length(x))
}
any_unnamed <- function(x) {
if (length(x) == 0) return(FALSE)
nms <- names(x)
is.null(nms) || !all(nzchar(nms))
}
separate_arguments <- function(...) {
x <- rlang::list2(...)
x_names <- rlang::names2(x)
is_named <- nzchar(x_names)
if (all(is_named)) {
return(list(attribs = x, children = list()))
}
if (!any(is_named)) {
return(list(attribs = list(), children = x))
}
list(attribs = x[is_named], children = unname(dropNulls(x[!is_named])))
}
#' Rename a named list
#'
#' @param x a named list to be renamed
#' @param nms a named character vector defining the renaming
#' @noRd
#' @examples
#' rename2(list(a=1, b=3, c=4, a=2), b="z", f="w", a="y")
#' #> list(y = 1, z = 3, c = 4, y = 2)
#' rename2(c("a", "b", "c", "a"), b="z", f="w", a="y")
#' #> c("y", "z", "c", "y")
rename2 <- function(x, ...) {
defs <- rlang::list2(...)
nms <- names(x) %||% as.character(x)
matches <- intersect(nms, names(defs))
map <- match(nms, names(defs))
mapidxNA <- is.na(map)
replacement <- as.character(defs)[map[!mapidxNA]]
if (is.null(names(x))) {
x[!mapidxNA] <- replacement
} else {
names(x)[!mapidxNA] <- replacement
}
x
}
# Get an accessible color contrast for a specified bg_color
# (and return NULL+warn on failure)
get_color_contrast <- function(bg_color) {
utils_layer <- sass::sass_layer(
functions = sass::sass_file(
path_inst("sass-utils", "color-contrast.scss")
),
defaults = c(
"$black: #000000;",
"$white: #FFFFFF;"
),
rules = sprintf(
"._ {--RET: #{color-contrast(%s)}}",
bg_color
)
)
tryCatch(
{
css <- sass::sass(
utils_layer,
cache_key_extra = get_package_version("bslib"),
# Don't listen to global Sass options so we can be sure
# that stuff like source maps won't be included
options = sass::sass_options(source_map_embed = FALSE)
)
# example: css <- "._ {\n --RET: #fff;\n}"
# we'll split to get value: ^ ^
ret <- strsplit(css, "--RET:")[[1]][2]
trimws(strsplit(ret, ";")[[1]][1])
},
error = function(err) {
warning(
"Failed to compute a contrasting color for '",
bg_color,
"'",
call. = FALSE
)
NULL
}
)
}
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