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#' Format Text Lines to LaTeX List
#'
#' Itemizes lines of text into a LaTeX list.
#'
#' @param enumerate logical. If \code{TRUE} uses the enumerate environment. If
#' \code{FALSE} itemize is used instead.
#' @param text character vector or text copied to the clipboard. Default is to
#' read from the clipboard.
#' @param copy2clip logical. If \code{TRUE} attempts to copy the output to the
#' clipboard.
#' @details This function formats text for use with LaTeX as a list.
#' @return Returns a character vector with a LaTeX list formatted text.
#' @section Warning: Ligatures are assumed to be "fi", however, these elements
#' may be "ff", "fi", "fl", "ffi" or "ffl".
#' @export
#' @examples
#' \dontrun{
#' x <- readLines(n = 3)
#' one, two buckle my shoe
#' three, four close the door
#' five, six pick up sticks
#' LL(, x)
#' LL(FALSE, x)
#' }
LL <- latexlist <- function(enumerate=TRUE, text = "clipboard",
copy2clip = TRUE) {
if (Sys.info()["sysname"] != "Windows") {
writeClipboard <- NULL
}
if (length(text) == 1 && text == "clipboard") {
if (Sys.info()["sysname"] == "Darwin") {
pcon <- pipe("pbpaste")
text <- scan(pcon, what="character", quiet=TRUE)
close(pcon)
}
if (Sys.info()["sysname"] == "Windows") {
text <- readClipboard()
}
if(!Sys.info()["sysname"] %in% c("Darwin", "Windows")) {
warning("not Windows or Darwin:
\b\b\b\b\b\b\b\bmay not be able to read from the clipboard")
}
}
text <- gsub("([\\?])([a-z])", "\\fi\\2", text)
ligs <- gregexpr("([\\?])([a-z])", text)[[1]]
nligs <- length(ligs)
if (ligs[1] > 0) {
plural <- ifelse(nligs > 1, "ligatures were", "ligature was")
warning(paste(ligs, plural, "found: \nCheck output!"))
}
if (enumerate) {
x <- "enumerate"
} else {
x <- "itemize"
}
z <- paste(" \\item ", text, sep ="")
zz <- as.matrix(unlist(list(
paste0("\\begin{", x, "}"),
z,
paste0("\\end{", x, "}"))),
ncol=1)
if(copy2clip){
if (Sys.info()["sysname"] == "Windows") {
writeClipboard(zz, format = 1)
}
if (Sys.info()["sysname"] == "Darwin") {
j <- pipe("pbcopy", "w")
writeLines(zz, con = j)
close(j)
}
}
dimnames(zz) <- list(c(rep("", nrow(zz))), c(""))
return(noquote(zz))
}
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