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# Copyright (c) 2022 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.
#
# This file is part of the r2rtf program.
#
# r2rtf 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
#' @title Pass Table Attributes to Subset Table
#'
#' @description
#' Pass original table attributes assigned through like `rtf_page`, `rtf_title`, `rtf_body`... to subsetted table
#' because original attributes won't be automatically carried over.
#'
#' @param tbl A data frame with attributes.
#' @param row a numeric vector for the row index to keep in the subsetted data.
#' @param col a numeric vector for the column index to keep in the subsetted data.
#'
#' @section Specification:
#' \if{latex}{
#' \itemize{
#' \item \code{tbl} is a data frame with attributes to be subsetted.
#' \item Return a data frame \code{tbl_sub} subsetted from \code{tbl} with original table attributes.
#' }
#' }
#' \if{html}{The contents of this section are shown in PDF user manual only.}
#'
#' @return the subsetted data frame \code{tbl_sub} with original attributes from \code{tbl}
#'
#' @examples
#' library(dplyr)
#' data(r2rtf_tbl1)
#' sub_table <- r2rtf_tbl1 %>%
#' rtf_body() %>%
#' r2rtf:::rtf_subset(row = 1:2, col = c(1, 4:5))
#'
#' attributes(sub_table)
#'
#' @noRd
rtf_subset <- function(tbl,
row = 1:nrow(tbl),
col = 1:ncol(tbl)) {
# Check argument type
check_args(tbl, type = c("data.frame"))
check_args(row, type = c("integer", "numeric"))
check_args(col, type = c("integer", "numeric"))
# collect all attributes name from input data frame
attr_all <- names(attributes(tbl))
# collect border and text attributes
attr_matrix <- attributes(tbl)[c(
"border_top", "border_left", "border_right", "border_bottom", "border_first", "border_last",
"border_color_left", "border_color_right", "border_color_top", "border_color_bottom",
"border_color_first", "border_color_last",
"text_font", "text_format", "text_font_size", "text_color",
"text_background_color", "text_justification", "text_convert", "cell_nrow",
"text_indent_first", "text_indent_left", "text_indent_right", "strwidth"
)]
attr_matrix <- attr_matrix[!is.na(names(attr_matrix))]
# collect scale attributes
attr_scale <- attributes(tbl)[c(
"border_width", "cell_height", "cell_justification",
"text_space_before", "text_space_after"
)]
# collect all other attributes
attr_other <- attr_all[!attr_all %in% c(
names(attr_matrix), names(attr_scale),
"col_rel_width", "names", "row.names", "class"
)]
# pass attributes to subset data frame
tbl_sub <- tbl[row, col]
if (!"data.frame" %in% class(tbl_sub)) {
tbl_sub <- data.frame(x = tbl_sub)
}
attributes(tbl_sub) <- append(
attributes(tbl_sub),
lapply(attr_matrix, function(x) if (!is.null(x)) x[row, col, drop = FALSE])
)
attributes(tbl_sub) <- append(attributes(tbl_sub), attr_scale)
attributes(tbl_sub) <- append(attributes(tbl_sub), attributes(tbl)[attr_other])
attr(tbl_sub, "col_rel_width") <- attr(tbl, "col_rel_width")[col]
tbl_sub
}
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