Add addins and gadgets

8年前 · ca54ae9d3e
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,21 +1,32 @@
 Package: regexplain
 Title: Rstudio addin to help you with your regexes (in progress)
 Version: 0.0.1.9000
 Version: 0.1.0
 Date: 2018-03-07
 Authors@R: person("Garrick", "Aden-Buie", email = "g.adenbuie@gmail.com", role = c("aut", "cre"))
 Authors@R: c(
    person("Garrick", "Aden-Buie", email = "g.adenbuie@gmail.com", role = c("aut", "cre")),
    person("Winston", "Chang", role = c("ctb"), comment = "Author of textInput and textAreaInput fragments from shiny"),
    person(family = "RStudio", role = "cph", comment = "Copyright holder of included shiny fragments")
    )
 Description: Test and view regexes.
 Depends: 
    R (>= 3.4.3),
    dplyr
 License: MIT + file LICENSE
 Depends: R (>= 3.4.3)
 License: GPL-3
 Encoding: UTF-8
 LazyData: true
 Imports: 
    stringr,
    stringi,
    rlang,
    purrr,
    dplyr,
    rmarkdown,
    knitr,
    utils,
    tidyr,
    rstudioapi
    rstudioapi,
    shiny,
    miniUI
 RoxygenNote: 6.0.1
 URL: https://github.com/gadenbuie/regexplain
 BugReports: https://github.com/gadenbuie/regexplain/issues
 Suggests: 
    testthat
--- a/LICENSE
+++ b/LICENSE
@@ -1,2 +0,0 @@
 YEAR: 2018
 COPYRIGHT HOLDER: Garrick Aden-Buie
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,21 +1,595 @@
 # MIT License

 Copyright (c) 2018 Garrick Aden-Buie

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 GNU General Public License
 ==========================

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 ### 13. Use with the GNU Affero General Public License

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 ### 15. Disclaimer of Warranty

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 PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
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 ### 16. Limitation of Liability

 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
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 ### 17. Interpretation of Sections 15 and 16

 If the disclaimer of warranty and limitation of liability provided above cannot be
 given local legal effect according to their terms, reviewing courts shall apply local
 law that most closely approximates an absolute waiver of all civil liability in
 connection with the Program, unless a warranty or assumption of liability accompanies
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 _END OF TERMS AND CONDITIONS_

 ## How to Apply These Terms to Your New Programs

 If you develop a new program, and you want it to be of the greatest possible use to
 the public, the best way to achieve this is to make it free software which everyone
 can redistribute and change under these terms.

 To do so, attach the following notices to the program. It is safest to attach them
 to the start of each source file to most effectively state the exclusion of warranty;
 and each file should have at least the “copyright” line and a pointer to
 where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) 2018 Garrick Aden-Buie

    This program 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/>.

 Also add information on how to contact you by electronic and paper mail.

 If the program does terminal interaction, make it output a short notice like this
 when it starts in an interactive mode:

    regexplain Copyright (C) 2018 Garrick Aden-Buie
    This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type 'show c' for details.

 The hypothetical commands `show w` and `show c` should show the appropriate parts of
 the General Public License. Of course, your program's commands might be different;
 for a GUI interface, you would use an “about box”.

 You should also get your employer (if you work as a programmer) or school, if any, to
 sign a “copyright disclaimer” for the program, if necessary. For more
 information on this, and how to apply and follow the GNU GPL, see
 &lt;<http://www.gnu.org/licenses/>&gt;.

 The GNU General Public License does not permit incorporating your program into
 proprietary programs. If your program is a subroutine library, you may consider it
 more useful to permit linking proprietary applications with the library. If this is
 what you want to do, use the GNU Lesser General Public License instead of this
 License. But first, please read
 &lt;<http://www.gnu.org/philosophy/why-not-lgpl.html>&gt;.
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -1,4 +1,16 @@
 # Generated by roxygen2: do not edit by hand

 export(regex_gadget)
 export(regexplain_cheatsheet)
 export(run_regex)
 export(view_regex)
 import(miniUI)
 import(shiny)
 importFrom(dplyr,"%>%")
 importFrom(dplyr,filter)
 importFrom(dplyr,group_by)
 importFrom(dplyr,mutate)
 importFrom(dplyr,select)
 importFrom(dplyr,summarize)
 importFrom(rlang,.data)
 importFrom(utils,getFromNamespace)
--- a/R/regex_gadget.R
+++ b/R/regex_gadget.R
@@ -0,0 +1,233 @@
 #' regexplain gadget
 #'
 #' @import miniUI
 #' @import shiny
 #' @param text Text to explore in gadget (editable using interface)
 #' @param start_page Open gadget to this tab, one of `"Text"`, `"Regex"`,
 #'   `"Output"`, or `"Help"`
 #' @export
 regex_gadget <- function(text = NULL,
                         start_page = if (is.null(text)) "Text" else "Regex") {
  stopifnot(requireNamespace("miniUI"), requireNamespace("shiny"))

  ui <- miniPage(
    shiny::includeCSS(system.file("style.css", package = "regexplain")),
    shiny::includeCSS(system.file("gadget.css", package = "regexplain")),
    gadgetTitleBar(
      "regexplain",
      right = miniTitleBarButton("done", "Send Regex To Console", TRUE)
    ),
    miniTabstripPanel(
      selected = match.arg(start_page, c("Text", "Regex", "Output", "Help")),
      miniTabPanel(
        "Text", icon = icon('file-text-o'),
        miniContentPanel(
          fillCol(
            textAreaInputAlt('text',
                             label = "Text to search or parse",
                             value = paste(text, collapse = "\n"),
                             resize = "both",
                             width = "100%",
                             height="90%",
                             placeholder = "Paste, enter, or edit your sample text here.")
          )
        )
      ),
      miniTabPanel(
        "Regex", icon = icon('terminal'),
        miniContentPanel(
          fillCol(
            flex = c(1, 3),
            fillCol(
              flex = c(1, 1),
              textInputCode('pattern', 'Regex', width = "100%",
                            placeholder = "Enter regex, single \\ okay"),
              checkboxGroupInput(
                'regex_options',
                label = "",
                inline = TRUE,
                width = "90%",
                choices = c("Break Lines" = "text_break_lines",
                            "Ignore Case" = "ignore.case",
                            "Perl Style" = "perl",
                            "Fixed" = "fixed",
                            "Use Bytes" = "useBytes"
                            # , "Invert" = "invert"
                ),
                selected = c('text_break_lines')
              )
            ),
            tags$div(
              class = "gadget-result",
              style = "overflow-y: scroll; height: 100%;",
              htmlOutput('result')
            )
          )
        )
      ),
      miniTabPanel(
        "Output", icon = icon("table"),
        miniContentPanel(
          fillCol(
            flex = c(1, 3),
            inputPanel(
              width = "100%;",
              selectInput('regexFn', label = 'Apply Function',
                          choices = regexFn_choices)
            ),
            # verbatimTextOutput('output_result', placeholder = TRUE)
            tags$pre(
              id = "output_result",
              class = "shiny-text-output",
              style = "overflow-y: scroll; height: 100%;"
            )
          )
        )
      ),
      miniTabPanel(
        "Help", icon = icon("support"),
        help_ui("help")
      )
    )
  )

  server <- function(input, output, session) {
    rtext <- reactive({
      x <- if ('text_break_lines' %in% input$regex_options) {
        strsplit(input$text, "\n")[[1]]
      } else input$text
      x
    })

    pattern <- reactive({
      sanitize_text_input(input$pattern)
    })

    alert_result <- function(msg, type = "danger") {
      msg <- gsub("\n", "<br>", msg)
      msg <- gsub("\t", "&nbsp;&nbsp;", msg)
      paste0("<pre class='alert alert-", type, "' ",
             "style='padding: 4px; margin-top: 1px; margin-bottom: 4px;'>",
             paste(msg, collapse = "<br>"),
             "</pre>")
    }

    output$result <- renderUI({
      if (is.null(rtext())) return(NULL)
      if (pattern() == "") {
        return(toHTML(paste('<p class="results">', escape_html(rtext()), "</p>", collapse = "")))
      }
      res <- NULL
      error_message <- NULL
      warning_message <- NULL
      tryCatch({
        res <- paste(
          view_regex(
            rtext(),
            pattern(),
            ignore.case = 'ignore.case' %in% input$regex_options,
            perl = 'perl' %in% input$regex_options,
            fixed = 'fixed' %in% input$regex_options,
            useBytes = 'useBytes' %in% input$regex_options,
            # invert = 'invert' %in% input$regex_options,
            render = FALSE,
            escape = TRUE),
          collapse = ""
        )
      },
      error = function(e) {
        error_message <<- alert_result(e$message, "danger")
      },
      warning = function(w) {
        warning_message <<- alert_result(w$message, "warning")
      })

      if (is.null(res)) res <- toHTML(
        paste('<p class="results">', escape_html(rtext()), "</p>", collapse = "")
      )

      toHTML(paste(error_message, warning_message, res))
    })

    output$output_result <- renderPrint({
      req(input$regexFn)
      regexPkg <- get_pkg_namespace(input$regexFn)
      regexFn <- getFromNamespace(input$regexFn, regexPkg)
      x <- if (regexPkg == "base") {
        regexFn(pattern(), rtext())
      } else if (regexPkg == "stringr") {
        regexFn(rtext(), pattern())
      } else {
        "Um. Not sure how I got here."
      }
      print(x)
    })

    # ---- Help Section ---- #
    help_text <- callModule(help_server, "help")

    observeEvent(input$done, {
      # browser()
      if (pattern() != "") {
        pattern <- paste0('regex <- "', escape_backslash(pattern()), '"')
        rstudioapi::sendToConsole(pattern, FALSE)
      }
      stopApp()
    })

    observeEvent(input$cancel, {
      stopApp()
    })
  }

  viewer <- shiny::paneViewer(700)
  runGadget(ui, server, viewer = viewer)
 }

 sanitize_text_input <- function(x) {
  if (grepl("\\u|\\x|\\N|\\a|\\o", x)) {
    try({
      y <- stringi::stri_unescape_unicode(x)
    }, silent = TRUE)
    if (!is.na(y)) x <- y
  }
  # x <- gsub("\u201C|\u201D", '"', x)
  # x <- gsub("\u2018|\u2019", "'", x)
  x
 }

 toHTML <- function(...) {
  x <- paste(..., collapse = "")
  x <- gsub("\n", "\\\\n", x)
  x <- gsub("\t", "\\\\t", x)
  x <- gsub("\r", "\\\\r", x)
  HTML(x)
 }

 regexFn_choices <- list(
  "Choose a function" = "",
  base = c(
    "grep",
    "grepl",
    "regexpr",
    "gregexpr",
    "regexec"
  ),
  stringr = c(
    "str_detect",
    "str_locate",
    "str_locate_all",
    "str_extract",
    "str_extract_all",
    "str_match",
    "str_match_all",
    "str_split"
  )
 )

 get_pkg_namespace <- function(fn) {
  x <- names(purrr::keep(regexFn_choices, ~ (fn %in% .)))
  if (length(x) > 1) warning(fn, " matches multiple functions in regexFn_choices, please review.")
  x
 }

--- a/R/regex_help.R
+++ b/R/regex_help.R
@@ -0,0 +1,138 @@
 #' Regex Cheatsheet Quick Reference
 #'
 #' @import miniUI
 #' @import shiny
 #' @export
 regexplain_cheatsheet <- function() {
  stopifnot(requireNamespace("miniUI"), requireNamespace("shiny"))

  ui <- miniPage(
    shiny::includeCSS(system.file("gadget.css", package = "regexplain")),
    gadgetTitleBar(
      "Regex Cheatsheet Quick Reference",
      right = miniTitleBarButton("done", "OK", TRUE)
    ),
    help_ui("help")
  )

  server <- function(input, output, session) {
    help_text <- callModule(help_server, "help")
    observeEvent(input$done, {
      stopApp()
    })
    observeEvent(input$cancel, {
      stopApp()
    })
  }

  viewer <- shiny::paneViewer(700)
  runGadget(ui, server, viewer = viewer)
 }

 help_ui <- function(id) {
  ns <- NS(id)

  miniContentPanel(
    fillRow(
      flex = c(1, 4),
      tagList(
        tags$ul(
          id = "help-sidebar",
          tags$li("Character Classes", class = "header"),
          tags$ul(
            class = "subgroup",
            tags$li(actionLink(ns("help_cat_character_classes_regular"), "Regular")),
            tags$li(actionLink(ns("help_cat_character_classes_prebuilt"), "Pre-Built"))
          ),
          tags$li(actionLink(ns("help_cat_anchors"), "Anchors")),
          tags$li("Escaped Characters", class = "header"),
          tags$ul(
            class = "subgroup",
            tags$li(actionLink(ns("help_cat_escaped_general"), "General")),
            tags$li(actionLink(ns("help_cat_escaped_hex"), "Hex")),
            tags$li(actionLink(ns("help_cat_escaped_control"), "Control Characters"))
          ),
          tags$li(actionLink(ns("help_cat_groups"), "Groups")),
          tags$li(actionLink(ns("help_cat_quantifiers"), "Quantifiers"))
        )
      ),
      tags$div(
        style = "width: 100%; padding-left: 10px;",
        uiOutput(ns('help_text_selected'))
      )
    )
  )
 }

 #' @importFrom rlang .data
 help_server <- function(input, output, session) {
  help_text <- reactiveVal("<p>Select a category from the left sidebar.</p>")

  make_html_table <- function(x) {
    select(x, .data$regexp, .data$text) %>%
      knitr::kable(
        col.names = c("Regexp", "Text"),
        escape = FALSE,
        format = "html")
  }

  output$help_text_selected <- renderUI({
    HTML(help_text())
  })

  observeEvent(input$help_cat_character_classes_regular, {
    cheatsheet %>%
      filter(.data$category == "character classes", .data$group == "regular") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_character_classes_prebuilt, {
    cheatsheet %>%
      filter(.data$category == "character classes", .data$group == "pre-built") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_anchors, {
    cheatsheet %>%
      filter(.data$category == "anchors") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_escaped_general, {
    cheatsheet %>%
      filter(.data$category == "escaped characters", .data$group == "general") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_escaped_hex, {
    cheatsheet %>%
      filter(.data$category == "escaped characters", .data$group == "hex") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_escaped_control, {
    cheatsheet %>%
      filter(.data$category == "escaped characters", .data$group == "control characters") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_groups, {
    cheatsheet %>%
      filter(.data$category == "groups") %>%
      make_html_table() %>%
      help_text()
  })

  observeEvent(input$help_cat_quantifiers, {
    cheatsheet %>%
      filter(.data$category == "quantifiers") %>%
      make_html_table() %>%
      help_text()
  })
 }
--- a/R/rstudio_addins.R
+++ b/R/rstudio_addins.R
@@ -0,0 +1,45 @@
 #' regexplain_addin
 #'
 #' @keywords internal
 regexplain_addin <- function() {
  # Get the document context.
  context <- rstudioapi::getActiveDocumentContext()

  # Get context text
  ctx_text <- context$selection[[1]]$text

  # If it is one line and evaluates to something, use that
  # Otherwise treat as text
  obj <- tryCatch({
    if (grepl("\n", ctx_text)) {
      ctx_text[1:min(length(ctx_text), 100)]
    } else {
      x <- eval(parse(text = ctx_text))
      x <- as.character(x)
      if (length(x) == 1 && grepl("\n", x))
        x <- strsplit(x, "\n")[[1]]
      if (length(x) > 10) {
        message(ctx_text, " gave ", length(x), " lines, limiting to first 10 unique lines.")
        x <- unique(x)
        x[1:min(length(x), 10)]
      } else x
    }
  },
  error = function(e) {as.character(ctx_text[1:min(length(ctx_text), 100)])})

  regex_gadget(if (length(obj) && obj != "") obj)

 }

 #' regexplain file loader
 #'
 #' @keywords internal
 regexplain_file <- function() {
  fname <- file.choose()
  x <- readLines(fname)
  if (length(x) > 100) {
    message("There were ", format(length(x), big.mark = ","), " lines in ", fname, "\nUsing only first 100.")
    x <- x[1:100]
  }
  regex_gadget(x, "Regex")
 }
--- a/R/run_regex.R
+++ b/R/run_regex.R
@@ -1,3 +1,8 @@
 #' Extract matched groups from regexp
 #'
 #' @param text Text to search
 #' @param pattern regexp
 #' @inheritParams base::regexec
 #' @export
 run_regex <- function(
  text,
@@ -8,16 +13,23 @@ run_regex <- function(
  useBytes = FALSE,
  invert = FALSE
 ) {
  # Use regex to get matches by group, gives start index and length
  m <- regexec(pattern, text, ignore.case, perl, fixed, useBytes)
  x <- purrr::map(purrr::set_names(m, text), function(mi) list('idx' = purrr::map2(mi, attr(mi, "match.length"), ~ if(.x[1] != -1) c(.x, .x + .y - 1L))))
  y <- purrr::map(purrr::set_names(text), ~ list(text = .))
  z <- purrr::map(purrr::set_names(regmatches(text, m), text), ~ list(m = .))
  x <- utils::modifyList(y, x, TRUE)
  utils::modifyList(z, x, TRUE)
  # Convert to start/end index
  x <- purrr::map(m, function(mi) {
    list(
      'idx' = purrr::map2(mi, attr(mi, "match.length"),
                          ~ if(.x[1] != -1) c(.x, .x + .y - 1L)))
  })
  # Store text and original regexc result with same hierarchy
  y <- purrr::map(text, ~ list(text = .))
  z <- purrr::map(regmatches(text, m), ~ list(m = .))
  # Zip text, indexes and regexc match object lists
  purrr::map(seq_along(x), ~ list(text = y[[.]][[1]], idx = x[[.]][[1]], m = z[[.]][[1]]))
 }

 wrap_result <- function(x, escape = FALSE) {
  if (is.null(x$idx[[1]])) return(x$text)
  if (is.null(x$idx[[1]])) return(if (escape) escape_html(x$text) else x$text)
  text <- x$text
  idx <- x$idx
  len_idx <- length(idx)
@@ -27,25 +39,25 @@ wrap_result <- function(x, escape = FALSE) {
    end = purrr::map_int(idx, ~ .[2]) + 1
  ) %>%
    mutate(
      class = sprintf("group g%02d", i),
      class = sprintf("group g%02d", .data$i),
      pad = 0
    )
  for (j in seq_len(nrow(inserts))) {
    if (inserts$i[j] == 0) next
    overlap <- filter(
      inserts[1:(j-1), ],
      i != 0,
      start <= !!inserts$start[j] & end >= !!inserts$end[j])
      .data$i != 0,
      .data$start <= !!inserts$start[j] & .data$end >= !!inserts$end[j])
    inserts[j, 'pad'] <- inserts$pad[j] + nrow(overlap)
  }
  inserts <- inserts %>%
    tidyr::gather(type, loc, start:end) %>%
    mutate(
      class = ifelse(pad > 0, sprintf("%s pad%02d", class, pad), class),
      insert = ifelse(type == 'start', sprintf('<span class="%s">', class), "</span>")
      class = ifelse(.data$pad > 0, sprintf("%s pad%02d", .data$class, .data$pad), .data$class),
      insert = ifelse(.data$type == 'start', sprintf('<span class="%s">', .data$class), "</span>")
    ) %>%
    group_by(loc, type) %>%
    summarize(insert = paste(insert, collapse = ''))
    group_by(.data$loc, .data$type) %>%
    summarize(insert = paste(.data$insert, collapse = ''))

  # inserts now gives html (span open and close) to insert and loc
  # first split text at inserts$loc locations,
@@ -77,13 +89,15 @@ wrap_regex <- function(pattern, escape = TRUE, exact = TRUE) {
  x <- strsplit(pattern, r_open_parens, perl = TRUE)[[1]]
  first <- x[1]
  x <- x[-1]
  x <- paste0(
    '<span class="g', sprintf("%02d", seq_along(x)), '">(',
    x,
    collapse = ""
  )
  x <- gsub("(?<![\\\\])\\)", ")</span>", x, perl = TRUE)
  if (exact) x <- gsub("\\\\", "\\\\\\\\", x)
  if (length(x)) {
    x <- paste0(
      '<span class="g', sprintf("%02d", seq_along(x)), '">(',
      x,
      collapse = ""
    )
    x <- gsub("(?<![\\\\])\\)", ")</span>", x, perl = TRUE)
  }
  if (exact) x <- escape_backslash(x)
  paste0(first, x)
 }

@@ -116,7 +130,19 @@ view_regex <- function(
  }
  res <- run_regex(text, pattern, ...)
  res <- purrr::map_chr(res, wrap_result, escape = escape)
  res <- paste("<p class='results'>", res, "</p>")
  res <- purrr::map_chr(res, function(resi) {
    result_pad <- ""
    if (grepl("pad\\d{2}", resi)) {
      max_pad <- max(stringr::str_extract_all(resi, "pad\\d{2}")[[1]])
      max_pad_level <- as.integer(stringr::str_extract(max_pad, "\\d{2}"))
      if (max_pad_level - 3 > 0) {
        result_pad <- sprintf("pad%02d", max_pad_level - 3)
      }
    }
    paste("<p class='results", result_pad, "'>", resi, "</p>")
  })
  res <- paste(res, collapse = "")
  if (!nchar(pattern)) res <- paste("<p class='results'>", text, "</p>")
  if (knitr) return(knitr::asis_output(res))
  if (!render) return(res)
  head <- c(
--- a/R/shiny_modified_inputs.R
+++ b/R/shiny_modified_inputs.R
@@ -0,0 +1,82 @@
 # ---- Modified Shiny Inputs ----
 # The shiny package as a whole is distributed under GPL-3
 # (GNU GENERAL PUBLIC LICENSE version 3).
 # See https://github.com/rstudio/shiny/blob/master/LICENSE

 #' Modified Text Area Input
 #'
 #' Standard [shiny::textAreaInput()] with additional `is_code` parameter, added
 #' code font style for the input text and with `autocomplete`, `autocorrect`,
 #' `autocapitalize` and `spellcheck` set to `off` or `false`.
 #'
 #' @inheritParams shiny::textAreaInput
 #' @param is_code Should the text input be considered verbatim code input?
 textAreaInputAlt <- function(inputId, label, value = "", width = NULL, height = NULL,
                             cols = NULL, rows = NULL, placeholder = NULL, resize = NULL,
                             is_code = TRUE) {
  `%AND%` <- getFromNamespace("%AND%", "shiny")

  value <- shiny::restoreInput(id = inputId, default = value)

  if (!is.null(resize)) {
    resize <- match.arg(resize, c("both", "none", "vertical", "horizontal"))
  }

  style <- paste(
    if (!is.null(width))  paste0("width: ",  shiny::validateCssUnit(width),  ";"),
    if (!is.null(height)) paste0("height: ", shiny::validateCssUnit(height), ";"),
    if (!is.null(resize)) paste0("resize: ", resize, ";"),
    if (is_code) 'font-family: "Monaco", "Inconsolata", monospace;'
  )

  parent_style <- paste(
    if (!is.null(width) && grepl("%", width)) paste0("width: ", width, ";"),
    if (!is.null(height) && grepl("%", height)) paste0("height: ", height, ";")
  )

  # Workaround for tag attribute=character(0) bug:
  #   https://github.com/rstudio/htmltools/issues/65
  if (length(style) == 0) style <- NULL

  shiny::div(class = "form-group shiny-input-container",
             label %AND% shiny::tags$label(label, `for` = inputId),
             style = if (!parent_style %in% c(" ", "", "  ")) parent_style,
             shiny::tags$textarea(
               id = inputId,
               class = "form-control",
               placeholder = placeholder,
               style = style,
               rows = rows,
               cols = cols,
               autocomplete = "off",
               autocorrect = "off",
               autocapitalize = "off",
               spellcheck = "false",
               value
             )
  )
 }

 #' Modified Text Input
 #'
 #' Standard [shiny::textInput()] with additional `width` parameter, added code
 #' font style for the input text and with `autocomplete`, `autocorrect`,
 #' `autocapitalize` and `spellcheck` set to `off` or `false`.
 #'
 #' @inheritParams shiny::textInput
 #' @param width Width of `shiny-input-container` div.
 textInputCode <- function(inputId, label, value = "", width = NULL,
                          placeholder = NULL) {
  `%AND%` <- getFromNamespace("%AND%", "shiny")
  value <- shiny::restoreInput(id = inputId, default = value)

  shiny::div(class = "form-group shiny-input-container",
             style = if (!is.null(width)) paste0("width: ", shiny::validateCssUnit(width), ";"),
             label %AND% shiny::tags$label(label, `for` = inputId),
             shiny::tags$input(id = inputId, type="text", class="form-control", value=value,
                               style = 'font-family: "Monaco", "Inconsolata", monospace;',
                               autocomplete = "off", autocorrect = "off",
                               autocapitalize = "off", spellcheck = "false",
                               placeholder = placeholder)
  )
 }
--- a/R/sysdata.rda
+++ b/R/sysdata.rda
--- a/R/utils.R
+++ b/R/utils.R
@@ -1,7 +1,16 @@
 #' @importFrom dplyr "%>%" mutate filter group_by summarize select
 #' @importFrom utils getFromNamespace
 NULL

 escape_html <- function(x) {
  x = gsub("&", "&amp;", x)
  x = gsub("<", "&lt;", x)
  x = gsub(">", "&gt;", x)
  x = gsub("\"", "&quot;", x)
  x = gsub(" ", "&nbsp;", x)
  x
 }

 escape_backslash <- function(x) {
  gsub("\\\\", "\\\\\\\\", x)
 }
--- a/Readme.Rmd
+++ b/Readme.Rmd
@@ -2,23 +2,72 @@
 title: "regexplain"
 output: github_document
 ---
 [![packageversion](https://img.shields.io/badge/Package%20version-0.1.0-orange.svg?style=flat-square)](commits/master)
 ![](https://img.shields.io/badge/lifecycle-needs_testers-yellow.svg)
 [![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](http://www.repostatus.org/badges/latest/active.svg)](http://www.repostatus.org/#active)
 [![CRAN_Status_Badge](http://www.r-pkg.org/badges/version/regexplain)](https://cran.r-project.org/package=regexplain)
 [![Last-changedate](https://img.shields.io/badge/last%20change-`r gsub('-', '--', Sys.Date())`-yellowgreen.svg)](/commits/master)

 ```{r setup, include=FALSE}
 knitr::opts_chunk$set(echo = TRUE)
 library(regexplain)
 ```


 <!-- Links -->
 [regexr]: https://regexr.com/

 ## WORK IN PROGRESS!!

 regexplain is going to be an RStudio addin that helps you interactively build up your regex.
 regexplain is an RStudio addin that helps you interactively build up your regex expressions.
 Inspired by [RegExr][regexr] and `stringr::str_view`.

 ## Done (ish)
 ## Installation

 Installation is easy with `devtools`:

 ```r
 devtools::install_github("gadenbuie/regexplain")
 ```

 ## Status

 Mostly working, but there [may be issues or future changes](#issues).

 I would love your help testing this, feel free to send me your feedback on Twitter at [&commat;grrrck](https://twitter.com/grrrck) or through the [issue tracker](https://github.com/gadenbuie/regexplain).

 ## RStudio Addin

 ![regexplain screencast](docs/gadget-screencast.gif)

 The main feature of this package is the RStudio Addin **Regexplain Selection**.
 Just select the text or object containing text (such as the variable name of a vector or a data.frame column) and run **Regexplain Selection** from the RStudio Addins dropdown.

 <img src="docs/rstudio-addin-list.png" width = "250px;" alt="regexplain in the Rstudio Addins dropdown">

 The addin will open an interface with 4 panes where you can

 You can use `view_regex()` for a `stringr::str_view()` replacement that includes groups.
 - edit the **text** you've imported
 - build up a **regex** expression and interactively see it applied to your text
 - test the **output** of common string matching functions from `base` and `stringr`
 - and refer to a **help**ful cheatsheet

 ![The panes of regexplain](docs/regexplain-gadget-tabs.png)

 When you're done, click on the **Send Regex to Console** to send your regex expression to... the console!

 ```r
 > regex <- "(is|were|was) ([[:alpha:]]+) ([[:alpha:]]+)"
 ```

 ### Additional Addins

 There are two more addins.
 **Regexplain File** lets you import the text lines from a file containing the text you want to process with regular expressions.
 **Regexplain Cheatsheet** opens the help page in the Viewer pane without blocking your current R session.

 ## View regex results without the interactivity

 regexplain also provides the function `view_regex()` that you can use as a `stringr::str_view()` replacement.
 In addition to highlighting matched portions of the text, `view_regex()` also colorizes groups and attemps to colorize the regex expression itself as well.

 ```r
 text <- c("breakfast=eggs;lunch=pizza",
@@ -40,13 +89,34 @@ view_regex(t_nested, r_nested)
 ![Example of nested groups](docs/view-nested.png)


 ## Planned (ish)
 ## Known Issues and Future Work {#issues}

 Regular expressions are nothing if not a collection of corner cases.
 Trying to pass regular expressions through Shiny and HTML inputs is a bit of a labrynth.
 For now, assume any issues or oddities you experience with this addin are entirely my fault and have nothing to do with the fine packages this addin is built on.
 If you do find an issue, [please file an issue](https://github.com/gadenbuie/regexplain).

 #### Things I know are wonky

 - Things get weird when regular text is surrounded by capture groups, i.e. `"(\w+) not grouped (\w+)"`.

 - `view_regex()` colorizes non-capture groups. I forgot about them when building that feature, I'll get back to it.

 #### Notes

 1. An Rstudio addin gadget that allows you to interactively enter the regex and see the results.
 Like the above example, where the regex field is a text input.
 - I've set up this app so that most escape sequences don't need to be escaped.
  For example, you can enter `\w`, whereas in R this would need to be stored as 
  `"\\w"`. The regex returned by the gadget will include the double backslash.
  In these cases the text input is not escaped by Shiny.
  
  Unicode and hex escape characters also do not need to be escaped, thanks to
  `stringi::stri_unescape_unicode()`. Here, `"\u"` *is* escaped by Shiny so I
  had to make sure they are unescaped. The list of escaped characters that get
  unescaped is `"\\u|\\x|\\N|\\a|\\o"`, please let me know if you find any 
  others that should be on this list.

 2. Import data from your environment, like a character vector, file, or data.frame column when opening the gadget.
 #### Planned improvements

 3. Help tab in the gadget, pulling from `?regex` but with some navigation.
 - I may add `stringi` functions to the list of available functions in the **Output** tab.

 4. Tab to interactively explore output of varying regex-applying functions. In other words, see what `stringr::str_locate_all` or `stringr::str_match_all` or `grep` or `grepl` return when applying the regex to your text.
 - I would like to add the regex/function options for the functions in the **Output** tab, similar to the options present in the **Regex** tab.
--- a/Readme.md
+++ b/Readme.md
@@ -1,18 +1,79 @@
 regexplain
 ================

 <!-- Links -->
 [![packageversion](https://img.shields.io/badge/Package%20version-0.1.0-orange.svg?style=flat-square)](commits/master)
 ![](https://img.shields.io/badge/lifecycle-needs_testers-yellow.svg)
 [![Project Status: Active – The project has reached a stable, usable
 state and is being actively
 developed.](http://www.repostatus.org/badges/latest/active.svg)](http://www.repostatus.org/#active)
 [![CRAN\_Status\_Badge](http://www.r-pkg.org/badges/version/regexplain)](https://cran.r-project.org/package=regexplain)
 [![Last-changedate](https://img.shields.io/badge/last%20change-2018--03--12-yellowgreen.svg)](/commits/master)

 ## WORK IN PROGRESS\!\!
 <!-- Links -->

 regexplain is going to be an RStudio addin that helps you interactively
 build up your regex. Inspired by [RegExr](https://regexr.com/) and
 regexplain is an RStudio addin that helps you interactively build up
 your regex expressions. Inspired by [RegExr](https://regexr.com/) and
 `stringr::str_view`.

 ## Done (ish)
 ## Installation

 Installation is easy with `devtools`:

 ``` r
 devtools::install_github("gadenbuie/regexplain")
 ```

 ## Status

 Mostly working, but there [may be issues or future changes](#issues).

 I would love your help testing this, feel free to send me your feedback
 on Twitter at [@grrrck](https://twitter.com/grrrck) or through the
 [issue tracker](https://github.com/gadenbuie/regexplain).

 ## RStudio Addin

 ![regexplain screencast](docs/gadget-screencast.gif)

 The main feature of this package is the RStudio Addin **Regexplain
 Selection**. Just select the text or object containing text (such as the
 variable name of a vector or a data.frame column) and run **Regexplain
 Selection** from the RStudio Addins
 dropdown.

 <img src="docs/rstudio-addin-list.png" width = "250px;" alt="regexplain in the Rstudio Addins dropdown">

 The addin will open an interface with 4 panes where you can

 You can use `view_regex()` for a `stringr::str_view()` replacement that
 includes groups.
  - edit the **text** you’ve imported
  - build up a **regex** expression and interactively see it applied to
    your text
  - test the **output** of common string matching functions from `base`
    and `stringr`
  - and refer to a **help**ful cheatsheet

 ![The panes of regexplain](docs/regexplain-gadget-tabs.png)

 When you’re done, click on the **Send Regex to Console** to send your
 regex expression to… the console\!

 ``` r
 > regex <- "(is|were|was) ([[:alpha:]]+) ([[:alpha:]]+)"
 ```

 ### Additional Addins

 There are two more addins. **Regexplain File** lets you import the text
 lines from a file containing the text you want to process with regular
 expressions. **Regexplain Cheatsheet** opens the help page in the Viewer
 pane without blocking your current R session.

 ## View regex results without the interactivity

 regexplain also provides the function `view_regex()` that you can use as
 a `stringr::str_view()` replacement. In addition to highlighting matched
 portions of the text, `view_regex()` also colorizes groups and attemps
 to colorize the regex expression itself as well.

 ``` r
 text <- c("breakfast=eggs;lunch=pizza",
@@ -33,19 +94,43 @@ view_regex(t_nested, r_nested)

 ![Example of nested groups](docs/view-nested.png)

 ## Planned (ish)
 ## Known Issues and Future Work

 Regular expressions are nothing if not a collection of corner cases.
 Trying to pass regular expressions through Shiny and HTML inputs is a
 bit of a labrynth. For now, assume any issues or oddities you experience
 with this addin are entirely my fault and have nothing to do with the
 fine packages this addin is built on. If you do find an issue, [please
 file an issue](https://github.com/gadenbuie/regexplain).

 #### Things I know are wonky

  - Things get weird when regular text is surrounded by capture groups,
    i.e. `"(\w+) not grouped (\w+)"`.

  - `view_regex()` colorizes non-capture groups. I forgot about them
    when building that feature, I’ll get back to it.

 #### Notes

 1.  An Rstudio addin gadget that allows you to interactively enter the
    regex and see the results. Like the above example, where the regex
    field is a text input.
  - I’ve set up this app so that most escape sequences don’t need to be
    escaped. For example, you can enter `\w`, whereas in R this would
    need to be stored as `"\\w"`. The regex returned by the gadget will
    include the double backslash. In these cases the text input is not
    escaped by Shiny.
    
    Unicode and hex escape characters also do not need to be escaped,
    thanks to `stringi::stri_unescape_unicode()`. Here, `"\u"` *is*
    escaped by Shiny so I had to make sure they are unescaped. The list
    of escaped characters that get unescaped is `"\\u|\\x|\\N|\\a|\\o"`,
    please let me know if you find any others that should be on this
    list.

 2.  Import data from your environment, like a character vector, file, or
    data.frame column when opening the gadget.
 #### Planned improvements

 3.  Help tab in the gadget, pulling from `?regex` but with some
    navigation.
  - I may add `stringi` functions to the list of available functions in
    the **Output** tab.

 4.  Tab to interactively explore output of varying regex-applying
    functions. In other words, see what `stringr::str_locate_all` or
    `stringr::str_match_all` or `grep` or `grepl` return when applying
    the regex to your text.
  - I would like to add the regex/function options for the functions in
    the **Output** tab, similar to the options present in the **Regex**
    tab.
--- a/data-raw/cheatsheet.R
+++ b/data-raw/cheatsheet.R
@@ -0,0 +1,66 @@
 cheatsheet <- tibble::tribble(
  ~category, ~group, ~regexp, ~text,
  "character classes", "regular", "<code>.</code>", "any character except newline",
  "character classes", "regular", "<code>\\w</code> <code>\\d</code> <code>\\s</code>", "word, digit, whitespace",
  "character classes", "regular", "<code>\\W</code> <code>\\D</code> <code>\\S</code>", "not word, digit, whitespace",
  # "character classes", "regular", "<code>\\p{property name}</code>", "matches character with unicode property, like <code>\\p{Uppercase}</code>, see <a href=\"http://www.unicode.org/reports/tr44/#Property_Index.\">unicode property list</a>.",
  "character classes", "regular", "<code>[abc]</code>", "any of a, b or c",
  "character classes", "regular", "<code>[^abc]</code>", "not a, b, or c",
  "character classes", "regular", "<code>[a-g]</code> <code>[1-3]</code>", "character between a & g or 1 & 3",
  "character classes", "regular", "<code>[\\^\\-]</code>", "matches <code>-</code> or <code>\\</code>",
  "character classes", "pre-built", "Used inside <code>[]</code>", "Example <code>[[:digit:]AX]</code> matches all digits and A and X",
  "character classes", "pre-built", "<code>[:punct:]</code>", "punctuation",
  "character classes", "pre-built", "<code>[:alpha:]</code>", "letters",
  "character classes", "pre-built", "<code>[:lower:]</code>", "lowercase letters",
  "character classes", "pre-built", "<code>[:upper:]</code>", "uppercase letters",
  "character classes", "pre-built", "<code>[:digit:]</code>", "digits",
  "character classes", "pre-built", "<code>[:xdigit:]</code>", "hex digits",
  "character classes", "pre-built", "<code>[:alnum:]</code>", "letters and numbers",
  "character classes", "pre-built", "<code>[:cntrl:]</code>", "control characters",
  "character classes", "pre-built", "<code>[:graph:]</code>", "letters, numbers, and punctuation",
  "character classes", "pre-built", "<code>[:print:]</code>", "letters, numbers, punctuation, and whitespace",
  "character classes", "pre-built", "<code>[:space:]</code>", "space characters (basically equivalent to <code>\\s</code>)",
  "character classes", "pre-built", "<code>[:blank:]</code>", "space and tab",
  "anchors", NA, "<code>^</code>", "start of string",
  "anchors", NA, "<code>$</code>", "end of string",
  "anchors", NA, "<code>\\b</code>", "word boundary",
  "anchors", NA, "<code>\\B</code>", "not-word boundary",
  "anchors", NA, "<code>\\A</code>", "stringr multiline: match start of the input",
  "anchors", NA, "<code>\\z</code>", "stringr multiline: match end of the input",
  "anchors", NA, "<code>\\Z</code>", "stringr multiline: match end of the input, but before final line terminator (if it exists)",
  "escaped characters", "general", "<code>\\.</code>", "dot",
  "escaped characters", "general", "<code>\\*</code>", "asterisk",
  "escaped characters", "general", "<code>\\\\</code>", "backslash",
  "escaped characters", "general", "<code>\\t</code>", "tab",
  "escaped characters", "general", "<code>\\n</code>", "linefeed",
  "escaped characters", "general", "<code>\\r</code>", "carriage return",
  "escaped characters", "hex", "<code>\\xhh</code>", "2 hex digits",
  "escaped characters", "hex", "<code>\\x{hhhh}</code>", "1-6 hex digits",
  "escaped characters", "hex", "<code>\\uhhhh</code>", "4 hex digitis",
  "escaped characters", "hex", "<code>\\Uhhhhhhhh</code>", "8 hex digits",
  "escaped characters", "hex", "<code>\\N{name}</code>", "Name of unicode character, e.g. <code>\\N{grinning face}</code>",
  "escaped characters", "control characters", "<code>\\a</code>", "bell",
  "escaped characters", "control characters", "<code>\\cX</code>", "match a control-X character",
  "escaped characters", "control characters", "<code>\\e</code>", "escape (<code>\\u001B</code>)",
  "escaped characters", "control characters", "<code>\\f</code>", "form feed (<code>\\u000C</code>)",
  "escaped characters", "control characters", "<code>\\0ooo</code>", "octal character where \"ooo\" is 1-3 octal digits",
  "groups", NA, "<code>(abc)</code>", "capture group",
  "groups", NA, "<code>\\1</code>, <code>\\2</code>, <code>\\3</code> ...", "backreference to group 1, group 2, etc.",
  "groups", NA, "<code>(?:abc)</code>", "non-capturing group, e.g. <code>\"gr(?:e|a)y\")</code>",
  "groups", NA, "<code>(?=abc)</code>", "postive lookahead; matches are followed by <code>abc</code> (non-capturing)",
  "groups", NA, "<code>(?!abc)</code>", "negative lookahead; matches are not followed by <code>abc</code> (non-capturing)",
  "groups", NA, "<code>(?&lt;=abc)</code>", "positive lookbehind; matches are preceeded by <code>abc</code> (non-capturing)",
  "groups", NA, "<code>(?&lt;!abc)</code>", "negative lookbehind; matches are not preceeded by <code>abc</code> (non-capturing)",
  "groups", NA, "<code>(?&gt;abc)</code>", "atomic-match; no back-tracking if later matches fail",
  "quantifiers", NA, "<code>a*</code>", "0 or more",
  "quantifiers", NA, "<code>a+</code>", "1 or more",
  "quantifiers", NA, "<code>a?</code>", "0 or 1",
  "quantifiers", NA, "<code>a{n}</code>", "exactly n times",
  "quantifiers", NA, "<code>a{n,}</code>", "n or more times",
  "quantifiers", NA, "<code>a{n,m}</code>", "n-m times",
  "quantifiers", NA, "add <code>+</code>", "makes match possessive",
  "quantifiers", NA, "add <code>?</code>", "makes match non-greedy",
  "quantifiers", NA, "<code>ab|cd</code>", "match ab or cd",
  "quantifiers", NA, "<code>w(?:o|a)ke</code>", "use non-capturing group for precedence"
 )

--- a/docs/gadget-screencast.gif
+++ b/docs/gadget-screencast.gif
--- a/docs/regexplain-gadget-tabs.png
+++ b/docs/regexplain-gadget-tabs.png
--- a/docs/rstudio-addin-list.png
+++ b/docs/rstudio-addin-list.png
--- a/inst/gadget.css
+++ b/inst/gadget.css
@@ -0,0 +1,43 @@
 th,
 td {
  padding: 10px 13px;
  text-align: left;
  border-bottom: 1px solid #E1E1E1; }
 th:first-child,
 td:first-child {
  padding-left: 0; }
 th:last-child,
 td:last-child {
 padding-right: 0; }

 #help-sidebar {
  padding-top: 5px;
  padding-left: 10px;
 }
 #help-sidebar ul {
  list-style-type: none;
  font-size: 1.1em;
 }
 #help-sidebar li {
  list-style: none;
 }
 #help-sidebar .header li {
  padding: 3px;
 }
 #help-sidebar a {
  display: block;
  width: 100%;
  text-decoration: none;
  text-align: left;
  padding: 3px;
 }
 #help-sidebar .subgroup {
  padding-left: 0px;
 }
 #help-sidebar .subgroup a {
  padding-left: 15px;
 }
 #help-sidebar a:hover {
  background-color: #eee;
  text-decoration: none;
 }
--- a/inst/rstudio/addins.dcf
+++ b/inst/rstudio/addins.dcf
@@ -0,0 +1,14 @@
 Name: Regexplain Selection
 Description: Build a regexp for use on selected text
 Binding: regexplain_addin
 Interactive: true

 Name: Regexplain File
 Description: Choose a file for which to build a regexp
 Binding: regexplain_file
 Interactive: true

 Name: Regexplain Cheetsheet
 Description: Regex Cheatsheet Quickreference
 Binding: regexplain_cheatsheet
 Interactive: false
--- a/inst/style.css
+++ b/inst/style.css
@@ -1,10 +1,18 @@
 .results {
  font-family: "Monaco", "Inconsolata", monospace;
  padding-top: 5px;
  color: #888888;
 }

 .gadget-result {
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  padding: 8px;
  overflow-wrap: break-word;
 }

 .group {
  border-bottom: 2px solid;
  color: black;
  padding: 0px;
 }

@@ -84,4 +92,17 @@
 }
 .pad06 {
  padding-bottom: 18px;
  margin-bottom: 18px;
 }
 .pad07 {
  padding-bottom: 21px;
  margin-bottom: 21px;
 }
 .pad08 {
  padding-bottom: 23px;
  margin-bottom: 23px;
 }
 .pad09 {
  padding-bottom: 25px;
  margin-bottom: 25px;
 }
--- a/man/regex_gadget.Rd
+++ b/man/regex_gadget.Rd
@@ -0,0 +1,18 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/regex_gadget.R
 \name{regex_gadget}
 \alias{regex_gadget}
 \title{regexplain gadget}
 \usage{
 regex_gadget(text = NULL, start_page = if (is.null(text)) "Text" else
  "Regex")
 }
 \arguments{
 \item{text}{Text to explore in gadget (editable using interface)}

 \item{start_page}{Open gadget to this tab, one of `"Text"`, `"Regex"`,
 `"Output"`, or `"Help"`}
 }
 \description{
 regexplain gadget
 }
--- a/man/regexplain_addin.Rd
+++ b/man/regexplain_addin.Rd
@@ -0,0 +1,12 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/rstudio_addins.R
 \name{regexplain_addin}
 \alias{regexplain_addin}
 \title{regexplain_addin}
 \usage{
 regexplain_addin()
 }
 \description{
 regexplain_addin
 }
 \keyword{internal}
--- a/man/regexplain_cheatsheet.Rd
+++ b/man/regexplain_cheatsheet.Rd
@@ -0,0 +1,11 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/regex_help.R
 \name{regexplain_cheatsheet}
 \alias{regexplain_cheatsheet}
 \title{Regex Cheatsheet Quick Reference}
 \usage{
 regexplain_cheatsheet()
 }
 \description{
 Regex Cheatsheet Quick Reference
 }
--- a/man/regexplain_file.Rd
+++ b/man/regexplain_file.Rd
@@ -0,0 +1,12 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/rstudio_addins.R
 \name{regexplain_file}
 \alias{regexplain_file}
 \title{regexplain file loader}
 \usage{
 regexplain_file()
 }
 \description{
 regexplain file loader
 }
 \keyword{internal}
--- a/man/run_regex.Rd
+++ b/man/run_regex.Rd
@@ -0,0 +1,32 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/run_regex.R
 \name{run_regex}
 \alias{run_regex}
 \title{Extract matched groups from regexp}
 \usage{
 run_regex(text, pattern, ignore.case = FALSE, perl = FALSE, fixed = FALSE,
  useBytes = FALSE, invert = FALSE)
 }
 \arguments{
 \item{text}{Text to search}

 \item{pattern}{regexp}

 \item{ignore.case}{if \code{FALSE}, the pattern matching is \emph{case
      sensitive} and if \code{TRUE}, case is ignored during matching.}

 \item{perl}{logical.  Should Perl-compatible regexps be used?}

 \item{fixed}{logical.  If \code{TRUE}, \code{pattern} is a string to be
    matched as is.  Overrides all conflicting arguments.}

 \item{useBytes}{logical.  If \code{TRUE} the matching is done
    byte-by-byte rather than character-by-character.  See
    \sQuote{Details}.}

 \item{invert}{logical.  If \code{TRUE} return indices or values for
    elements that do \emph{not} match.}
 }
 \description{
 Extract matched groups from regexp
 }
--- a/man/textAreaInputAlt.Rd
+++ b/man/textAreaInputAlt.Rd
@@ -0,0 +1,47 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/shiny_modified_inputs.R
 \name{textAreaInputAlt}
 \alias{textAreaInputAlt}
 \title{Modified Text Area Input}
 \usage{
 textAreaInputAlt(inputId, label, value = "", width = NULL, height = NULL,
  cols = NULL, rows = NULL, placeholder = NULL, resize = NULL,
  is_code = TRUE)
 }
 \arguments{
 \item{inputId}{The \code{input} slot that will be used to access the value.}

 \item{label}{Display label for the control, or \code{NULL} for no label.}

 \item{value}{Initial value.}

 \item{width}{The width of the input, e.g. \code{'400px'}, or \code{'100\%'};
 see \code{\link{validateCssUnit}}.}

 \item{height}{The height of the input, e.g. \code{'400px'}, or
 \code{'100\%'}; see \code{\link{validateCssUnit}}.}

 \item{cols}{Value of the visible character columns of the input, e.g.
 \code{80}. If used with \code{width}, \code{width} will take precedence in
 the browser's rendering.}

 \item{rows}{The value of the visible character rows of the input, e.g.
 \code{6}. If used with \code{height}, \code{height} will take precedence in
 the browser's rendering.}

 \item{placeholder}{A character string giving the user a hint as to what can
 be entered into the control. Internet Explorer 8 and 9 do not support this
 option.}

 \item{resize}{Which directions the textarea box can be resized. Can be one of
 \code{"both"}, \code{"none"}, \code{"vertical"}, and \code{"horizontal"}.
 The default, \code{NULL}, will use the client browser's default setting for
 resizing textareas.}

 \item{is_code}{Should the text input be considered verbatim code input?}
 }
 \description{
 Standard [shiny::textAreaInput()] with additional `is_code` parameter, added
 code font style for the input text and with `autocomplete`, `autocorrect`,
 `autocapitalize` and `spellcheck` set to `off` or `false`.
 }
--- a/man/textInputCode.Rd
+++ b/man/textInputCode.Rd
@@ -0,0 +1,27 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/shiny_modified_inputs.R
 \name{textInputCode}
 \alias{textInputCode}
 \title{Modified Text Input}
 \usage{
 textInputCode(inputId, label, value = "", width = NULL,
  placeholder = NULL)
 }
 \arguments{
 \item{inputId}{The \code{input} slot that will be used to access the value.}

 \item{label}{Display label for the control, or \code{NULL} for no label.}

 \item{value}{Initial value.}

 \item{width}{Width of `shiny-input-container` div.}

 \item{placeholder}{A character string giving the user a hint as to what can
 be entered into the control. Internet Explorer 8 and 9 do not support this
 option.}
 }
 \description{
 Standard [shiny::textInput()] with additional `width` parameter, added code
 font style for the input text and with `autocomplete`, `autocorrect`,
 `autocapitalize` and `spellcheck` set to `off` or `false`.
 }
--- a/tests/testthat.R
+++ b/tests/testthat.R
@@ -0,0 +1,4 @@
 library(testthat)
 library(regexplain)

 test_check("regexplain")
--- a/tests/testthat/test-wrap_regex.R
+++ b/tests/testthat/test-wrap_regex.R
@@ -0,0 +1,10 @@
 context("test-wrap_regex.R")

 test_that("wrap_regex generally works", {
  expect_equal(wrap_regex("(a)(b)"),
               "<span class=\"g01\">(a)</span><span class=\"g02\">(b)</span>")
 })

 test_that("wrap_regex doesn't add parens", {
  expect_equal(wrap_regex("\\ba"), "\\ba")
 })