R/dissUtils-internal.R

In dissUtils: Utilities for making pairwise comparisons of multivariate data

## .help.ESS <-
## function (topic, package = NULL, lib.loc = NULL, verbose = getOption("verbose"),
##     try.all.packages = getOption("help.try.all.packages"), help_type = getOption("help_type"))
## {
##     types <- c("text", "html", "pdf")
##     if (!missing(package))
##         if (is.name(y <- substitute(package)))
##             package <- as.character(y)
##     if (missing(topic)) {
##         if (!missing(package)) {
##             help_type <- if (!length(help_type))
##                 "text"
##             else match.arg(tolower(help_type), types)
##             if (interactive() && help_type == "html") {
##                 if (tools:::httpdPort == 0L)
##                   tools::startDynamicHelp()
##                 if (tools:::httpdPort <= 0L)
##                   return(library(help = package, lib.loc = lib.loc,
##                     character.only = TRUE))
##                 browser <- if (.Platform$GUI == "AQUA") {
##                   function(x, ...) {
##                     .Internal(aqua.custom.print("help-files",
##                       x))
##                     return(invisible(x))
##                   }
##                 }
##                 else getOption("browser")
##                 browseURL(paste("http://127.0.0.1:", tools:::httpdPort,
##                   "/library/", package, "/html/00Index.html",
##                   sep = ""), browser)
##                 return(invisible())
##             }
##             else return(library(help = package, lib.loc = lib.loc,
##                 character.only = TRUE))
##         }
##         if (!missing(lib.loc))
##             return(library(lib.loc = lib.loc))
##         topic <- "help"
##         package <- "utils"
##         lib.loc <- .Library
##     }
##     ischar <- tryCatch(is.character(topic) && length(topic) ==
##         1L, error = identity)
##     if (inherits(ischar, "error"))
##         ischar <- FALSE
##     if (!ischar) {
##         reserved <- c("TRUE", "FALSE", "NULL", "Inf", "NaN",
##             "NA", "NA_integer_", "NA_real_", "NA_complex_", "NA_character_")
##         stopic <- deparse(substitute(topic))
##         if (!is.name(substitute(topic)) && !stopic %in% reserved)
##             stop("'topic' should be a name, length-one character vector or reserved word")
##         topic <- stopic
##     }
##     help_type <- if (!length(help_type))
##         "text"
##     else match.arg(tolower(help_type), types)
##     paths <- index.search(topic, find.package(package, lib.loc,
##         verbose = verbose))
##     tried_all_packages <- FALSE
##     if (!length(paths) && is.logical(try.all.packages) && !is.na(try.all.packages) &&
##         try.all.packages && missing(package) && missing(lib.loc)) {
##         for (lib in .libPaths()) {
##             packages <- .packages(TRUE, lib)
##             packages <- packages[is.na(match(packages, .packages()))]
##             paths <- c(paths, index.search(topic, file.path(lib,
##                 packages)))
##         }
##         paths <- paths[paths != ""]
##         tried_all_packages <- TRUE
##     }
##     paths <- unique(paths)
##     attributes(paths) <- list(call = match.call(), topic = topic,
##         tried_all_packages = tried_all_packages, type = help_type)
##     class(paths) <- "help_files_with_topic"
##     paths
## }