# Copyright 2010-2014 Meik Michalke <meik.michalke@hhu.de>
#
# This file is part of the R package rkwarddev.
#
# rkwarddev is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# rkwarddev is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with rkwarddev. If not, see <http://www.gnu.org/licenses/>.
#' Create node "varselector" for RKWard plugins
#'
#' @param label Character string, a text label for the variable selection slot.
#' Must be set if \code{id.name="auto"}.
#' @param id.name Character vector, unique ID for this element.
#' @param i18n Either a character string or a named list with the optional elements \code{context}
#' or \code{comment}, to give some \code{i18n_context} information for this node. If set to \code{FALSE},
#' the attribute \code{label} will be renamed into \code{noi18n_label}.
#' @return An object of class \code{XiMpLe.node}.
#' @export
#' @seealso
#' \code{\link[rkwarddev:rk.XML.varslot]{rk.XML.varslot}},
#' \code{\link[rkwarddev:rk.XML.vars]{rk.XML.vars}},
#' and the \href{help:rkwardplugins}{Introduction to Writing Plugins for RKWard}
#' @examples
#' test.varselector <- rk.XML.varselector("Select some vars")
#' cat(pasteXML(test.varselector))
rk.XML.varselector <- function(label=NULL, id.name="auto", i18n=NULL){
if(identical(id.name, "auto")){
## if this ID generation get's changed, change it in rk.XML.vars(), too!
attr.list <- list(id=auto.ids(label, prefix=ID.prefix("varselector", length=3)))
} else if(!is.null(id.name)){
attr.list <- list(id=id.name)
} else {}
if(!is.null(label)){
attr.list[["label"]] <- label
} else {
if(identical(id.name, "auto")){
stop(simpleError("If id.name=\"auto\", then 'label' must have a value!"))
} else {}
}
# check for additional i18n info; if FALSE, "label" will be renamed to "noi18n_label"
attr.list <- check.i18n(i18n=i18n, attrs=attr.list)
node <- check.i18n(
i18n=i18n,
node=XMLNode("varselector", attrs=attr.list),
comment=TRUE
)
return(node)
}
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