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#' Detects if the call is made from within an RStudio Rmd file or a file
#' with the html_notebook output set.
#' @importFrom rstudioapi isAvailable getActiveDocumentContext
#' @keywords internal
prIsNotebook <- function() {
if (!isAvailable()) {
return(FALSE)
}
ctxt <- getActiveDocumentContext()
if (grepl("\\.Rmd$", ctxt$path)) {
return(prCheck4output2console(ctxt))
}
# Look for html_notebook within the header if the file hasn't been saved
contents <- ctxt$contents
header <- grep("^---$", contents)
if (length(header) == 2) {
return(any(grepl(
"html_notebook$",
contents[min(header):max(header)]
)))
}
return(FALSE)
}
prCheck4output2console <- function(ctxt) {
contents <- ctxt$contents
header_boundary <- grep("^---$", contents)
if (length(header_boundary) <= 1) {
# Play it safe if the header is invalid
return(TRUE)
}
header <- contents[header_boundary[1]:header_boundary[2]]
return(!any(grepl("chunk_output_type: console", header)))
}
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