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% File src/library/utils/man/clipboard.Rd
% Part of the R package, https://www.R-project.org
% Copyright 1995-2022 R Core Team
% Distributed under GPL 2 or later

\name{clipboard}
\Rdversion{1.1}
\alias{getClipboardFormats}
\alias{readClipboard}
\alias{writeClipboard}
\alias{clipboard}
\title{Read/Write to/from the Clipboard in MS Windows}
\description{
  Transfer text between a character vector and the Windows clipboard in
  MS Windows (only).
}
\usage{
getClipboardFormats(numeric = FALSE)
readClipboard(format = 13, raw = FALSE)
writeClipboard(str, format = 13)
}
\arguments{
  \item{numeric}{logical: should the result be in human-readable form
    (the default) or raw numbers?}
  \item{format}{an integer giving the desired format.}
  \item{raw}{should the value be returned as a raw vector rather than
    as a character vector?}
  \item{str}{a character vector or a raw vector.}
}
\details{
  The Windows clipboard offers data in a number of formats: see
  e.g.\sspace{}\url{https://docs.microsoft.com/en-gb/windows/desktop/dataxchg/clipboard-formats}.

  The standard formats include
  \tabular{lrl}{
  CF_TEXT        \tab   1  \tab Text in the machine's locale\cr
  CF_BITMAP      \tab   2  \tab \cr
  CF_METAFILEPICT \tab  3  \tab Metafile picture\cr
  CF_SYLK        \tab   4  \tab Symbolic link\cr
  CF_DIF         \tab   5  \tab Data Interchange Format\cr
  CF_TIFF        \tab   6  \tab Tagged-Image File Format\cr
  CF_OEMTEXT     \tab   7  \tab Text in the OEM codepage\cr
  CF_DIB         \tab   8  \tab Device-Independent Bitmap\cr
  CF_PALETTE     \tab   9  \tab \cr
  CF_PENDATA     \tab   10 \tab \cr
  CF_RIFF        \tab   11 \tab Audio data\cr
  CF_WAVE        \tab   12 \tab Audio data\cr
  CF_UNICODETEXT \tab   13 \tab Text in Unicode (UCS-2)\cr
  CF_ENHMETAFILE \tab   14 \tab Enhanced metafile\cr
  CF_HDROP       \tab   15 \tab Drag-and-drop data\cr
  CF_LOCALE      \tab   16 \tab Locale for the text on the clipboard\cr
  CF_MAX         \tab   17 \tab Shell-oriented formats\cr
  }
  Applications normally make data available in one or more of these and
  possibly additional private formats.  Use \code{raw = TRUE} to read binary
  formats, \code{raw = FALSE} (the default) for text formats.  The
  current codepage is used to convert text to Unicode text, and
  information on that is contained in the \code{CF_LOCALE} format.
  (Take care if you are running R in a different locale from Windows. It is
  recommended to read as Unicode text, so that Windows does the conversion
  based on \code{CF_LOCALE}, if available.) 

  The \code{writeClipboard} function will write a character vector as
  text or Unicode text with standard CR-LF line terminators.  It will
  copy a raw vector directly to the clipboard without any changes. It is
  recommended to use Unicode text (the default) instead of text to avoid interoperability
  problems. (Note that \R 4.2 and newer on recent systems uses UTF-8 as the
  native encoding but the machine's locale uses a different encoding.)
}
\value{
  For \code{getClipboardFormats}, a character or integer vector of
  available formats, in numeric order.  If non human-readable character
  representation is known, the number is returned.

  For \code{readClipboard}, a character vector by default, a raw vector
  if \code{raw} is \code{TRUE}, or \code{NULL}, if the format is
  unavailable.

  For \code{writeClipboard} an invisible logical indicating success or
  failure.
}
\note{
  This is only available on Windows.
}
\seealso{
  \code{\link{file}} which can be used to set up a connection to a clipboard.
}
\keyword{utilities}