Fix #14 Add pattern parameter to regex_gadget()

R/regex_gadget.R

 #' @import miniUI
 #' @import shiny
 #' @param text Text to explore in gadget (editable using interface)
+#' @param pattern Regular Expression to edit or visualize using RegExplain
 #' @param start_page Open gadget to this tab, one of `"Text"`, `"RegEx"`,
 #'   `"Output"`, or `"Help"`
 #' @export
 regex_gadget <- function(
   text = NULL,
+  pattern = NULL,
   start_page = if (is.null(text)) "Text" else "RegEx"
 ) {
   stopifnot(requireNamespace("miniUI"), requireNamespace("shiny"))
               fillRow(
                 flex = c(6, 1),
                 textInputCode('pattern', 'RegEx', width = "100%",
+                              value = pattern,
                               placeholder = "Standard RegEx, e.g. \\w+_\\d{2,4}\\s+"),
                 tags$div(style = "margin-top: 23px; margin-left:6px;",
                          actionButton("library_show", "Library", class = "btn-success"))

man/regex_gadget.Rd

 \alias{regex_gadget}
 \title{RegExplain gadget}
 \usage{
-regex_gadget(text = NULL, start_page = if (is.null(text)) "Text" else
-  "RegEx")
+regex_gadget(text = NULL, pattern = NULL, start_page = if
+  (is.null(text)) "Text" else "RegEx")
 }
 \arguments{
 \item{text}{Text to explore in gadget (editable using interface)}
 
+\item{pattern}{Regular Expression to edit or visualize using RegExplain}
+
 \item{start_page}{Open gadget to this tab, one of \code{"Text"}, \code{"RegEx"},
 \code{"Output"}, or \code{"Help"}}
 }