| #' Put a few rows of a table into one category |
| #' |
| #' @description Group a few rows in a table together under a label. |
| #' |
| #' @param kable_input Output of `knitr::kable()` with `format` specified |
| #' @param group_label A character string for the name of the group |
| #' @param start_row A numeric value that tells the function in which row the |
| #' group starts. Note that the counting excludes header rows and other group |
| #' labeling rows |
| #' @param end_row A numeric value that tells the function in which row the group |
| #' ends. |
| #' @param index A named vector providing the index for robust row-grouping tasks. |
| #' Basically, you can use it in the same way as `add_header_above()`. |
| #' @param label_row_css A character string for any customized css used for the |
| #' labeling row. By default, the labeling row will have a solid black line |
| #' underneath. Only useful for HTML documents. |
| #' @param latex_gap_space A character value telling LaTeX how large the gap |
| #' between the previous row and the group labeling row. Only useful for LaTeX |
| #' documents. |
| #' @param escape A T/F value showing whether special characters should be |
| #' escaped. |
| #' @param latex_align Adjust justification of group_label in latex only. Value should be "c" for |
| #' centered on row, "r" for right justification, or "l" for left justification. Default |
| #' Value is "l" If using html, the alignment can be set by using the label_row_css |
| #' parameter. |
| #' @param colnum A numeric that determines how many columns the text should span. |
| #' The default setting will have the text span the entire length. |
| #' @param bold A T/F value to control whether the text should be bolded. |
| #' @param italic A T/F value to control whether the text should to be emphasized. |
| #' @param hline_before A T/F value that addes a horizontal line before the group_row label. Default |
| #' value is False. |
| #' @param hline_after A replicate of `hline.after` in xtable. It |
| #' addes a hline after the row |
| #' @param extra_latex_after Extra LaTeX text to be added after the row. |
| #' |
| #' @examples x <- knitr::kable(head(mtcars), "html") |
| #' # Put Row 2 to Row 5 into a Group and label it as "Group A" |
| #' group_rows(x, "Group A", 2, 5) |
| #' |
| #' @export |
| group_rows <- function(kable_input, group_label = NULL, |
| start_row = NULL, end_row = NULL, |
| index = NULL, |
| label_row_css = "border-bottom: 1px solid;", |
| latex_gap_space = "0.3em", |
| escape = TRUE, latex_align = "l", colnum = NULL, |
| bold = T, |
| italic = F, |
| hline_before = F, |
| hline_after = F, |
| extra_latex_after = NULL) { |
| |
| kable_format <- attr(kable_input, "format") |
| if (!kable_format %in% c("html", "latex")) { |
| warning("Please specify format in kable. kableExtra can customize either ", |
| "HTML or LaTeX outputs. See https://haozhu233.github.io/kableExtra/ ", |
| "for details.") |
| return(kable_input) |
| } |
| if (is.null(index)) { |
| if (kable_format == "html") { |
| if(!missing(latex_align)) warning("latex_align parameter is not used in HTML Mode, |
| use label_row_css instead.") |
| return(group_rows_html(kable_input, group_label, start_row, end_row, |
| label_row_css, escape, colnum)) |
| } |
| if (kable_format == "latex") { |
| return(group_rows_latex(kable_input, group_label, start_row, end_row, |
| latex_gap_space, escape, latex_align, colnum, |
| bold, italic, hline_before, hline_after, extra_latex_after)) |
| } |
| } else { |
| index <- group_row_index_translator(index) |
| out <- kable_input |
| if (kable_format == "html") { |
| for (i in 1:nrow(index)) { |
| if(!missing(latex_align)) warning("latex_align parameter is not used in HTML Mode, |
| use label_row_css instead.") |
| out <- group_rows_html(out, index$header[i], |
| index$start[i], index$end[i], |
| label_row_css, escape, colnum) |
| } |
| } |
| if (kable_format == "latex") { |
| for (i in 1:nrow(index)) { |
| out <- group_rows_latex(out, index$header[i], |
| index$start[i], index$end[i], |
| latex_gap_space, escape, latex_align, colnum, |
| bold, italic, hline_before, hline_after, extra_latex_after) |
| } |
| } |
| return(out) |
| } |
| } |
| |
| group_row_index_translator <- function(index) { |
| index <- standardize_header_input(index) |
| index$start <- cumsum(c(1, index$colspan))[1:length(index$colspan)] |
| index$end <- cumsum(index$colspan) |
| index$header <- trimws(index$header) |
| index <- index[index$header != "", ] |
| return(index) |
| } |
| |
| group_rows_html <- function(kable_input, group_label, start_row, end_row, |
| label_row_css, escape, colnum) { |
| kable_attrs <- attributes(kable_input) |
| kable_xml <- read_kable_as_xml(kable_input) |
| kable_tbody <- xml_tpart(kable_xml, "tbody") |
| |
| if (escape) { |
| group_label <- escape_html(group_label) |
| } |
| |
| group_header_rows <- attr(kable_input, "group_header_rows") |
| group_seq <- seq(start_row, end_row) |
| if (!is.null(group_header_rows)) { |
| group_seq <- positions_corrector(group_seq, group_header_rows, |
| length(xml_children(kable_tbody))) |
| } |
| |
| # Insert a group header row |
| starting_node <- xml_child(kable_tbody, group_seq[1]) |
| kable_ncol <- ifelse(is.null(colnum), |
| length(xml_children(starting_node)), |
| colnum) |
| group_header_row_text <- paste0( |
| '<tr groupLength="', length(group_seq), '"><td colspan="', kable_ncol, |
| '" style="', label_row_css, '"><strong>', group_label, |
| "</strong></td></tr>" |
| ) |
| group_header_row <- read_xml(group_header_row_text, options = "COMPACT") |
| xml_add_sibling(starting_node, group_header_row, .where = "before") |
| |
| # add indentations to items |
| out <- as_kable_xml(kable_xml) |
| attributes(out) <- kable_attrs |
| attr(out, "group_header_rows") <- c(attr(out, "group_header_rows"), group_seq[1]) |
| out <- add_indent_html(out, positions = seq(start_row, end_row)) |
| return(out) |
| } |
| |
| group_rows_latex <- function(kable_input, group_label, start_row, end_row, |
| gap_space, escape, latex_align, colnum, |
| bold = T, italic = F, hline_before = F ,hline_after = F, |
| extra_latex_after = NULL) { |
| table_info <- magic_mirror(kable_input) |
| out <- solve_enc(kable_input) |
| |
| if (table_info$duplicated_rows) { |
| dup_fx_out <- fix_duplicated_rows_latex(out, table_info) |
| out <- dup_fx_out[[1]] |
| table_info <- dup_fx_out[[2]] |
| } |
| |
| if (escape) { |
| group_label <- input_escape(group_label, latex_align) |
| } |
| |
| if (bold) { |
| group_label <- paste0("\\\\textbf{", group_label, "}") |
| } |
| if (italic) group_label <- paste0("\\\\textit{", group_label, "}") |
| # Add group label |
| if (table_info$booktabs) { |
| if (is.null(table_info$colnames)) { |
| rowtext <- table_info$contents[start_row] |
| } else { |
| rowtext <- table_info$contents[start_row + 1] |
| } |
| pre_rowtext <- paste0( |
| "\\\\addlinespace[", gap_space, "]\n", |
| ifelse(hline_before,"\\\\hline\n", ""), |
| "\\\\multicolumn{", ifelse(is.null(colnum), |
| table_info$ncol, |
| colnum), |
| "}{", latex_align, "}{", group_label, |
| "}\\\\\\\\\n", ifelse(hline_after, "\\\\hline\n", '') |
| ) |
| } else { |
| rowtext <- table_info$contents[start_row + 1] |
| rowtext <- paste0("\\\\hline\n", rowtext) |
| pre_rowtext <- paste0( |
| "\\\\hline\n\\\\multicolumn{", table_info$ncol, "}{", latex_align,"}{", |
| group_label, "}\\\\\\\\\n" |
| ) |
| } |
| if(!is.null(extra_latex_after)){ |
| pre_rowtext <- paste0(pre_rowtext, |
| regex_escape(extra_latex_after, double_backslash = TRUE)) |
| } |
| new_rowtext <- paste0(pre_rowtext, rowtext) |
| out <- sub(rowtext, new_rowtext, out) |
| out <- gsub("\\\\addlinespace\n", "", out) |
| out <- structure(out, format = "latex", class = "knitr_kable") |
| table_info$group_rows_used <- TRUE |
| attr(out, "kable_meta") <- table_info |
| out <- add_indent_latex(out, seq(start_row, end_row)) |
| return(out) |
| } |