65 lines
1.6 KiB
R
65 lines
1.6 KiB
R
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#' Format numbers (with D3)
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#'
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#' @param format Format for numbers, currency, percentage, e.g. \code{".0\%"} for rounded percentage.
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#' See online documentation : \url{https://github.com/d3/d3-format}.
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#' @param prefix Character string to append before formatted value.
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#' @param suffix Character string to append after formatted value.
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#' @param locale Localization to use, for example \code{"fr-FR"} for french,
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#' see possible values here: \url{https://github.com/d3/d3-format/tree/master/locale}.
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#'
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#' @return a \code{JS} function
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#' @export
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#'
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#' @importFrom htmlwidgets JS
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#'
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#' @example examples/format.R
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format_num <- function(format, prefix = "", suffix = "", locale = "en-US") {
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check_locale_d3(locale)
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path <- system.file(file.path("d3-format-locale", paste0(locale, ".json")), package = "apexcharter")
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if (path != "") {
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locale <- paste(readLines(con = path, encoding = "UTF-8"), collapse = "")
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}
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JS(sprintf(
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"function(value) {var locale = d3.formatLocale(JSON.parse('%s')); return '%s' + locale.format('%s')(value) + '%s';}",
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locale, prefix, format, suffix
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))
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}
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check_locale_d3 <- function(x) {
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json <- list.files(system.file("d3-format-locale", package = "apexcharter"))
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njson <- gsub("\\.json", "", json)
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if (!x %in% njson) {
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stop(paste(
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"Invalid D3 locale, must be one of:",
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paste(njson, collapse = ", ")
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), call. = FALSE)
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}
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}
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#' Format date in JS
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#'
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#' @param x Date to use in JavaScript
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#'
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#' @return a JavaScript string
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#' @export
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#'
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format_date <- function(x) {
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stopifnot(length(x) == 1)
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JS(sprintf("new Date('%s').getTime()", x))
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}
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