Tools to Work with the 'Splash' JavaScript Rendering Service in R
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trunc_string <- function (x, maxlen = 20, justify = "left") {
toolong <- nzchar(x) > maxlen
maxwidth <- ifelse(toolong, maxlen - 3, maxlen)
chopx <- substr(x, 1, maxwidth)
lenx <- length(x)
for (i in 1:length(x)) if (toolong[i]) chopx[i] <- paste(chopx[i], "...", sep = "")
return(formatC(chopx, width = maxlen, flag = ifelse(justify == "left", "-", " ")))
}