Modularize help panel and add regex cheetsheet addin

R/regex_gadget.R

-#' 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 gadget
 #'
 #' @import miniUI
       ),
       miniTabPanel(
         "Help", icon = icon("support"),
-        miniContentPanel(
-          fillRow(
-            flex = c(1, 4),
-            tagList(
-              # selectInput("help_category", "Category", c("", unique(cheatsheet$category))),
-              # uiOutput("help_group"),
-              tags$ul(
-                id = "help-sidebar",
-                tags$li("Character Classes", class = "header"),
-                tags$ul(
-                  class = "subgroup",
-                  tags$li(actionLink("help_cat_character_classes_regular", "Regular")),
-                  tags$li(actionLink("help_cat_character_classes_prebuilt", "Pre-Built"))
-                ),
-                tags$li(actionLink("help_cat_anchors", "Anchors")),
-                tags$li("Escaped Characters", class = "header"),
-                tags$ul(
-                  class = "subgroup",
-                  tags$li(actionLink("help_cat_escaped_general", "General")),
-                  tags$li(actionLink("help_cat_escaped_hex", "Hex")),
-                  tags$li(actionLink("help_cat_escaped_control", "Control Characters"))
-                ),
-                tags$li(actionLink("help_cat_groups", "Groups")),
-                tags$li(actionLink("help_cat_quantifiers", "Quantifiers"))
-              )
-            ),
-            tags$div(
-              style = "width: 100%; padding-left: 10px;",
-              uiOutput('help_text_selected')
-            )
-          )
-        )
+        help_ui("help")
       )
     )
   )
       } else {
         "Um. Not sure how I got here."
       }
-
-      # if (inherits(x, 'logical') || inherits(x, 'character')) {
-      #   if (length(x) < 25) print(x) else print(head(x, 25))
-      # } else if (inherits(x, 'matrix') | inherits(x, "data.frame")) {
-      #   if (nrow(x) < 15) { print(x)
-      #   } else glimpse(x)
-      # } else {
-      #   str(x, max.level = 3)
-      # }
       print(x)
     })
 
-    # output$help_group <- renderUI({
-    #   req(input$help_category)
-    #   groups <- unique(cheatsheet[cheatsheet$category == input$help_category, ]$group)
-    #   if (is.na(groups[1])) {
-    #     NULL
-    #   } else {
-    #     selectInput("help_group", "Group", groups)
-    #   }
-    # })
-
     # ---- Help Section ---- #
-    help_text <- reactiveVal("<p>Select a category from the left sidebar.</p>")
-
-    output$help_text_selected <- renderUI({
-      HTML(help_text())
-    })
-
-    make_html_table <- function(x) {
-      select(x, .data$regexp, .data$text) %>%
-        knitr::kable(
-          col.names = c("Regexp", "Text"),
-          escape = FALSE,
-          format = "html")
-    }
-
-    observeEvent(input$help_cat_character_classes_regular, {
-      cheatsheet %>%
-        filter(category == "character classes", group == "regular") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_character_classes_prebuilt, {
-      cheatsheet %>%
-        filter(category == "character classes", group == "pre-built") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_anchors, {
-      cheatsheet %>%
-        filter(category == "anchors") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_escaped_general, {
-      cheatsheet %>%
-        filter(category == "escaped characters", group == "general") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_escaped_hex, {
-      cheatsheet %>%
-        filter(category == "escaped characters", group == "hex") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_escaped_control, {
-      cheatsheet %>%
-        filter(category == "escaped characters", group == "control characters") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_groups, {
-      cheatsheet %>%
-        filter(category == "groups") %>%
-        make_html_table %>%
-        help_text
-    })
-
-    observeEvent(input$help_cat_quantifiers, {
-      cheatsheet %>%
-        filter(category == "quantifiers") %>%
-        make_html_table %>%
-        help_text
-    })
-
+    help_text <- callModule(help_server, "help")
 
     observeEvent(input$done, {
       # browser()
   if (length(x) > 1) warning(fn, " matches multiple functions in regexFn_choices, please review.")
   x
 }
+

R/regex_help.R

+#' 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'))
+      )
+    )
+  )
+}
+
+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(category == "character classes", group == "regular") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_character_classes_prebuilt, {
+    cheatsheet %>%
+      filter(category == "character classes", group == "pre-built") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_anchors, {
+    cheatsheet %>%
+      filter(category == "anchors") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_escaped_general, {
+    cheatsheet %>%
+      filter(category == "escaped characters", group == "general") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_escaped_hex, {
+    cheatsheet %>%
+      filter(category == "escaped characters", group == "hex") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_escaped_control, {
+    cheatsheet %>%
+      filter(category == "escaped characters", group == "control characters") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_groups, {
+    cheatsheet %>%
+      filter(category == "groups") %>%
+      make_html_table %>%
+      help_text
+  })
+
+  observeEvent(input$help_cat_quantifiers, {
+    cheatsheet %>%
+      filter(category == "quantifiers") %>%
+      make_html_table %>%
+      help_text
+  })
+}

R/rstudio_addins.R

+#' 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)
+
+}

inst/rstudio/addins.dcf

-Name: regexplain
+Name: Regexplain Selection
 Description: Regex with selected text
 Binding: regexplain_addin
 Interactive: false
+
+Name: Regex Cheetsheet
+Description: Regex Cheatsheet Quickreference
+Binding: regexplain_cheatsheet
+Interactive: false