Add missing Rd tags, namely value/@eturn

R/color.R

 #'   scales::show_col(c(blue_light, blue, blue_dark))
 #' }
 #'
+#' @return A character string with the lightened or darkened color in
+#'   hexadecimal format.
 #' @name lighten_darken_color
 NULL
 
 #'   scales::show_col(c(blue, blue_transparent))
 #' }
 #'
+#' @return A character string with added opacity level as hexadecimal characters.
 #' @export
 apply_alpha <- function(color_hex, opacity = 0.5) {
   paste0(color_hex, as.hexmode(round(255 * opacity, 0)))
 #'   scales::show_col(c(light_green, contrast_green, dark_purple, contrast_purple))
 #' }
 #'
+#' @return The `black` color or `white` color according to which color provides
+#'   the greates contrast with the input color.
+#'
 #' @export
 choose_dark_or_light <- function(x, black = "#000000", white = "#FFFFFF") {
   if (is_light_color(x)) eval(black) else eval(white)

R/ggplot2.R

 #' theme_xaringan_get_value("header_color")
 #' theme_xaringan_get_value("text_bold_color")
 #'
+#' @return The value of the xaringanthemer style parameter.
 #' @export
 theme_xaringan_get_value <- function(setting, css_file = NULL) {
   requires_xaringanthemer_env(css_file = css_file)

R/utils.R

 #' @param ... Font weights to include, example "400", "400i"
 #' @param languages Font languages to include (dependent on the font.) See
 #'   [google_language_codes()].
+#' @return A `"google_font"` object.
 #' @export
 google_font <- function(family, ..., languages = NULL) {
   base <- "https://fonts.googleapis.com/css?family="
 #'   validates that the language codes given are valid.
 #' @seealso [google_font()]
 #' @param language_codes Vector of potential Google language codes
+#' @return A vector of Google Font language codes matching `language_codes`.
 #' @export
 google_language_codes <- function(
   language_codes = c(

R/xaringanthemer-deprecated.R

 #'
 #' These functions in xaringanthemer have been deprecated or renamed.
 #'
+#' @param ... Argumets passed to the new or renamed functions.
+#' @return The result of the new or renamed function.
 #' @name xaringanthemer-deprecated
 NULL
 

man-roxygen/style-usage.R

 #' xaringan::moon_reader:
 #'   css: xaringan-themer.css
 #' ````
-#
+#'
+#' @return The CSS styles are written to the file path provided in `outfile`
+#'   (by default to `xaringan-themer.css`). If `outfile` is `NULL`, the CSS is
+#'   returned directly as a character string.
+#'

man/apply_alpha.Rd

 
 \item{opacity}{Desired opacity of the output color}
 }
+\value{
+A character string with added opacity level as hexadecimal characters.
+}
 \description{
 Applies alpha (or opacity) to a color in hexadecimal form by
 converting opacity in the \verb{[0, 1]} range to hex in the \verb{[0, 255]} range

man/choose_dark_or_light.Rd

 \item{white}{Text or foreground color or expression, e.g. "#EEE" or
 \code{substitute(lighten_color(x, 0.8))}, if white text provides the best contrast.}
 }
+\value{
+The \code{black} color or \code{white} color according to which color provides
+the greates contrast with the input color.
+}
 \description{
 Takes a color input as \code{x} and returns either the black or white color (or
 expression) if dark or light text should be used over the input color for

man/google_font.Rd

 \item{languages}{Font languages to include (dependent on the font.) See
 \code{\link[=google_language_codes]{google_language_codes()}}.}
 }
+\value{
+A \code{"google_font"} object.
+}
 \description{
 Builds Google Fonts URL from family name. Extra weights are given in the
 \code{...} parameters. Languages can be specified in \code{langauges} and must one or

man/google_language_codes.Rd

 \arguments{
 \item{language_codes}{Vector of potential Google language codes}
 }
+\value{
+A vector of Google Font language codes matching \code{language_codes}.
+}
 \description{
 Gives a list of valid Language Codes for Google Fonts, or
 validates that the language codes given are valid.

man/lighten_darken_color.Rd

 where 0 is entirely the original color and 1 is entirely white
 (\code{lighten_color()}) or black (\code{darken_color()}).}
 }
+\value{
+A character string with the lightened or darkened color in
+hexadecimal format.
+}
 \description{
 Produces a linear blend of the color with white or black.
 }

man/style_duo.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 A duotone theme designed to work well with two complementary
 colors.

man/style_duo_accent.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 An default xaringan theme with a two colors used for color
 accents on select elements (headers, bold text, etc.).

man/style_duo_accent_inverse.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 An "inverted" default xaringan theme with a two colors used
 for color accents on select elements (headers, bold text, etc.).

man/style_mono_accent.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 The default xaringan theme with a single color used for color
 accents on select elements (headers, bold text, etc.).

man/style_mono_accent_inverse.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 An "inverted" default xaringan theme with a single color used
 for color accents on select elements (headers, bold text, etc.).

man/style_mono_dark.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 A dark monotone theme based around a single color.
 }

man/style_mono_light.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 A light monotone theme based around a single color.
 }

man/style_solarized_dark.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 A dark theme based around on the solarized color scheme.
 Works well with "\code{highlightStyle: solarized-dark}" or

man/style_solarized_light.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 A light theme based around on the solarized color scheme.
 Works well with "\code{highlightStyle: solarized-dark}" or

man/style_xaringan.Rd

 
 \item{outfile}{Customized xaringan CSS output file name, default is "xaringan-themer.css"}
 }
+\value{
+The CSS styles are written to the file path provided in \code{outfile}
+(by default to \code{xaringan-themer.css}). If \code{outfile} is \code{NULL}, the CSS is
+returned directly as a character string.
+}
 \description{
 Creates a customized Xaringan theme CSS file.
 }

man/theme_xaringan_get_value.Rd

 if you have only saved your theme CSS file and you aren't creating your
 CSS theme with \pkg{xaringanthemer} in your slides' source file.}
 }
+\value{
+The value of the xaringanthemer style parameter.
+}
 \description{
 A helper function to retrieve the value of style settings as set by a
 xaringanthemer style function, for use in plotting and other circumstances.

man/xaringanthemer-deprecated.Rd

 
 solarized_dark(...)
 }
+\arguments{
+\item{...}{Argumets passed to the new or renamed functions.}
+}
+\value{
+The result of the new or renamed function.
+}
 \description{
 These functions in xaringanthemer have been deprecated or renamed.