Bootstrap 5 support

.Rbuildignore

@@ -1,7 +1,7 @@
 ^bootswatch\.Rproj$
 ^\.Rproj\.user$
-inst/lib/bsw/.github
-inst/lib/bs-sass/assets/images/.keep
+inst/lib/bsw4/.github
+inst/lib/bs3/assets/images/.keep
 inst/lib/bsw3/.npmignore
 ^inst/lib/bs-a11y-p/\.jshintrc$
 ^inst/lib/bs-a11y-p/\.npmignore$

.github/workflows/R-CMD-check.yaml

@@ -40,6 +40,13 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
+      # https://github.com/actions/checkout/issues/135
+      - name: Set git to use LF
+        if: runner.os == 'Windows'
+        run: |
+          git config --system core.autocrlf false
+          git config --system core.eol lf
+
       - uses: actions/checkout@v2
 
       - uses: r-lib/actions/setup-r@master

DESCRIPTION

@@ -27,7 +27,7 @@ Imports:
     rlang,
     magrittr
 Suggests:
-    shiny (>= 1.6.0),
+    shiny (>= 1.6.0.9001),
     rmarkdown (>= 2.7),
     thematic,
     knitr,
@@ -54,9 +54,9 @@ Collate:
     'deprecated.R'
     'files.R'
     'imports.R'
+    'nav-items.R'
     'nav-update.R'
     'navs-legacy.R'
-    'nav-items.R'
     'navs.R'
     'onLoad.R'
     'page.R'
@@ -69,4 +69,6 @@ Collate:
     'versions.R'
 URL: https://rstudio.github.io/bslib/, https://github.com/rstudio/bslib
 BugReports: https://github.com/rstudio/bslib/issues
-Remotes: rstudio/htmltools
+Remotes: 
+  rstudio/htmltools,
+  rstudio/shiny

R/bootswatch.R

@@ -38,7 +38,8 @@ theme_version <- function(theme) {
 bootswatch_dist <- function(version) {
   switch_version(
     version,
-    four = lib_file("bsw", "dist"),
+    five = lib_file("bsw5", "dist"),
+    four = lib_file("bsw4", "dist"),
     three = lib_file("bsw3")
   )
 }

R/bs-dependencies.R

@@ -342,7 +342,7 @@ as_bs_theme <- function(theme) {
     # Also support `bs_theme_dependencies(version = '4')` and
     # `bs_theme_dependencies(theme = 'bootswatch')`
     if (length(theme) == 1) {
-      if (theme %in% c("4", "4-3", "4+3", "3")) {
+      if (theme %in% c(versions(), "4-3", "4+3")) {
         return(bs_theme(version = theme))
       } else {
         return(bs_theme(bootswatch = theme))

R/bs-theme-preview.R

@@ -44,14 +44,17 @@ colorpicker_deps <- function() {
   )
 }
 
-opts_metadata <- function() {
-  jsonlite::fromJSON(
+opts_metadata <- function(theme) {
+  opts <- jsonlite::fromJSON(
     system_file("themer/options.json", package = "bslib"),
     simplifyDataFrame = FALSE
   )
+  themes <- bootswatch_themes(theme_version(theme))
+  opts[[1]]$bootswatch$choices <- c("default", themes)
+  opts
 }
 
-bs_themer_ui <- function(opts, vals) {
+bs_themer_ui <- function(opts, vals, theme) {
 
   make_control <- function(id, opts) {
     value <- vals[[id]]
@@ -106,24 +109,40 @@ bs_themer_ui <- function(opts, vals) {
     )
   }
 
+  version <- theme_version(theme)
   accordion <- lapply(seq_along(opts), function(i) {
     opt_name <- names(opts)[[i]]
     elId <- paste0("bsthemerCollapse", i)
     btn <- tags$button(
-      class = "btn btn-link px-3 py-2 w-100 text-left border-0",
-      "data-toggle" = "collapse", "data-target" = paste0("#", elId),
+      class = if (version >= 5) "accordion-button" else "btn btn-link px-3 py-2 w-100 text-left border-0",
+      class = if (i != 1) "collapsed",
+      "data-toggle" = "collapse",
+      "data-target" = paste0("#", elId),
+      # data-bs-* is for BS5+
+      "data-bs-toggle" = "collapse",
+      "data-bs-target" = paste0("#", elId),
       "aria-expanded" = "true", "aria-controls" = elId,
       opt_name
     )
     controls <- lapply(seq_along(opts[[i]]), function(j) {
       make_control(names(opts[[i]])[[j]], opts[[i]][[j]])
     })
-    tagList(
-      div(class = "card-header p-0 border-0", btn),
+    div(
+      class = if (version >= 5) "accordion-item",
+      div(
+        class = if (version >= 5) "accordion-header" else "card-header p-0 border-0",
+        btn
+      ),
       div(
         id = elId, class = if (i == 1) "show" else "collapse",
         "data-parent" = "#bsthemerAccordion",
-        div(class = "card-body", controls)
+        # data-bs-* is for BS5+
+        "data-bs-parent" = "#bsthemerAccordion",
+        class = if (version >= 5) "accordion-collapse",
+        div(
+          class = if (version >= 5) "accordion-body" else "card-body",
+          controls
+        )
       )
     )
   })
@@ -155,7 +174,11 @@ bs_themer_ui <- function(opts, vals) {
         class = "card-header font-weight-bold bg-dark text-light px-3 py-2",
         "Theme customizer",
         tags$div(id = "bsthemerToggle", class = "float-right",
-          "data-toggle" = "collapse", "data-target" = "#bsthemerAccordion",
+          "data-toggle" = "collapse",
+          "data-target" = "#bsthemerAccordion",
+          # data-bs-* is for BS5+
+          "data-bs-toggle" = "collapse",
+          "data-bs-target" = "#bsthemerAccordion",
           style = css(cursor = "pointer"),
           tags$span(),
           bs_dependency_defer(themer_css_dependency)
@@ -164,6 +187,7 @@ bs_themer_ui <- function(opts, vals) {
 
       div(
         id = "bsthemerAccordion", class = "collapse show",
+        class = if (version >= 5) "accordion",
         style = css(overflow_y = "auto"),
         accordion
       )
@@ -220,11 +244,8 @@ themer_css_dependency <- function(theme) {
 #' @examples
 #' library(shiny)
 #'
-#' # Initialize Bootstrap 4 with Bootstrap 3 compatibility shim
-#' theme <- bs_theme(version = 4, bg = "black", fg = "white")
-#'
 #' ui <- fluidPage(
-#'   theme = theme,
+#'   theme = bs_theme(bg = "black", fg = "white"),
 #'   h1("Heading 1"),
 #'   h2("Heading 2"),
 #'   p(
@@ -309,12 +330,12 @@ bs_themer <- function(gfonts = TRUE, gfonts_update = FALSE) {
   gfont_info <- if (isTRUE(gfonts)) get_gfont_info(gfonts_update)
 
   # Insert the theming control panel with values informed by the theme settings
-  themer_opts <- opts_metadata()
+  themer_opts <- opts_metadata(theme)
   themer_vars <- unlist(unname(lapply(themer_opts, names)))
   sass_vars <- setdiff(themer_vars, "bootswatch")
   themer_vals <- as.list(get_themer_vals(theme, sass_vars))
   themer_vals$bootswatch <- bootswatch
-  shiny::insertUI("body", where = "beforeEnd", ui = bs_themer_ui(themer_opts, themer_vals))
+  shiny::insertUI("body", where = "beforeEnd", ui = bs_themer_ui(themer_opts, themer_vals, theme))
 
   input <- session$input
 
@@ -478,7 +499,7 @@ spinner_overlay <- function() {
         class = "spinner-border",
         style = "width:5rem; height:5rem; color: rgba(0,0,0,0.8);",
         role = "status",
-        span(class = "sr-only", "Refreshing stylesheets...")
+        span(class = "sr-only visually-hidden", "Refreshing stylesheets...")
       ),
       span(class = "lead mt-1", style = "color: rgba(0,0,0,0.8);", "Refreshing stylesheets...")
     )

R/bs-theme-update.R

@@ -15,10 +15,9 @@ bs_base_colors <- function(theme, bg = NULL, fg = NULL) {
     args <- rename2(args, !!!get_base_color_map(theme))
   }
 
-  # TODO: Bootstrap 5 will be different (no more $yiq-text-light/$yiq-text-dark)
   switch_add_variables(
     theme, args,
-    four = if (use_body) identity else bs4_base_colors,
+    default = if (use_body) identity else bs4_base_colors,
     three = if (use_body) identity else bs3_base_colors
   )
 }

R/bs-theme.R

@@ -117,6 +117,11 @@ bs_theme <- function(version = version_default(), bootswatch = NULL, ...,
                      success = NULL, info = NULL, warning = NULL, danger = NULL,
                      base_font = NULL, code_font = NULL, heading_font = NULL,
                      font_scale = NULL) {
+
+  if (version >= 5 && !is_available("shiny", "1.6.0.9001")) {
+    warning("`bs_theme(version = 5)` is designed to work with shiny v1.6.0.9001 or higher", call. = FALSE)
+  }
+
   theme <- bs_bundle(
     bs_theme_init(version, bootswatch),
     bootstrap_bundle(version),
@@ -214,7 +219,7 @@ is_bs_theme <- function(x) {
 # theme_version() & theme_bootswatch() search for
 bs_theme_init <- function(version, bootswatch = NULL) {
   add_class(
-    sass_bundle(),
+    sass_layer(defaults = list("bootstrap-version" = version)),
     c(
       bootswatch_class(bootswatch),
       paste0("bs_version_", version),
@@ -250,17 +255,46 @@ color_contrast_layer <- function() {
 # -----------------------------------------------------------------
 
 bootstrap_bundle <- function(version) {
+  pandoc_tables <- list(
+    # Pandoc uses align attribute to align content but BS4 styles take precedence...
+    # we may want to consider adopting this more generally in "strict" BS4 mode as well
+    ".table th[align=left] { text-align: left; }",
+    ".table th[align=right] { text-align: right; }",
+    ".table th[align=center] { text-align: center; }"
+  )
+
   res <- switch_version(
     version,
-    four = sass_bundle(
+    five = sass_bundle(
       # Don't name this "core" bundle so it can't easily be removed
+      sass_layer(
+        defaults = bs5_sass_files(c("functions", "variables")),
+        declarations = bs5_sass_files(c("mixins", "utilities"))
+      ),
+      # Returns a _named_ list of bundles (i.e., these should be easily removed)
+      !!!rule_bundles(
+        # Names here should match https://github.com/twbs/bs5/blob/master/scss/bootstrap.scss
+        bs5_sass_files(c(
+          "root", "reboot", "type", "images", "containers", "grid",
+          "tables", "forms", "buttons", "transitions", "dropdown",
+          "button-group", "nav", "navbar", "card", "accordion", "breadcrumb",
+          "pagination", "badge", "alert", "progress", "list-group", "close",
+          "toasts", "modal", "tooltip", "popover", "carousel", "spinners",
+          "offcanvas", "helpers", "utilities/api"
+        ))
+      ),
+      # Additions to BS5 that are always included (i.e., not a part of compatibility)
+      sass_layer(rules = pandoc_tables),
+      bs3compat = bs3compat_bundle()
+    ),
+    four = sass_bundle(
       sass_layer(
         defaults = bs4_sass_files(c("deprecated", "functions", "variables")),
         mixins = bs4_sass_files("mixins")
       ),
       # Returns a _named_ list of bundles (i.e., these should be easily removed)
       !!!rule_bundles(
-        # Names here should match https://github.com/twbs/bootstrap/blob/master/scss/bootstrap.scss
+        # Names here should match https://github.com/twbs/bs4/blob/master/scss/bootstrap.scss
         bs4_sass_files(c(
           "root", "reboot", "type", "images", "code", "grid", "tables",
           "forms", "buttons", "transitions", "dropdown", "button-group",
@@ -271,15 +305,7 @@ bootstrap_bundle <- function(version) {
         ))
       ),
       # Additions to BS4 that are always included (i.e., not a part of compatibility)
-      sass_layer(
-        rules = list(
-          # Pandoc uses align attribute to align content but BS4 styles take precedence...
-          # we may want to consider adopting this more generally in "strict" BS4 mode as well
-          ".table th[align=left] { text-align: left; }",
-          ".table th[align=right] { text-align: right; }",
-          ".table th[align=center] { text-align: center; }"
-        )
-      ),
+      sass_layer(rules = pandoc_tables),
       bs3compat = bs3compat_bundle()
     ),
     three = sass_bundle(
@@ -302,7 +328,7 @@ bootstrap_bundle <- function(version) {
       glyphicon_font_files = sass_layer(
         defaults = list("icon-font-path" = "'glyphicon-fonts/'"),
         file_attachments = c(
-          "glyphicon-fonts" = lib_file("bs-sass", "assets", "fonts", "bootstrap")
+          "glyphicon-fonts" = lib_file("bs3", "assets", "fonts", "bootstrap")
         )
       )
     )
@@ -319,14 +345,16 @@ bootstrap_bundle <- function(version) {
 bootstrap_javascript_map <- function(version) {
   switch_version(
     version,
-    four = lib_file("bs", "dist", "js", "bootstrap.bundle.min.js.map")
+    five = lib_file("bs5", "dist", "js", "bootstrap.bundle.min.js.map"),
+    four = lib_file("bs4", "dist", "js", "bootstrap.bundle.min.js.map")
   )
 }
 bootstrap_javascript <- function(version) {
   switch_version(
     version,
-    four = lib_file("bs", "dist", "js", "bootstrap.bundle.min.js"),
-    three = lib_file("bs-sass", "assets", "javascripts", "bootstrap.min.js")
+    five = lib_file("bs5", "dist", "js", "bootstrap.bundle.min.js"),
+    four = lib_file("bs4", "dist", "js", "bootstrap.bundle.min.js"),
+    three = lib_file("bs3", "assets", "javascripts", "bootstrap.min.js")
   )
 }
 
@@ -342,7 +370,7 @@ bs3compat_bundle <- function() {
     rules = sass_file(system_file("bs3compat", "_rules.scss", package = "bslib")),
     # Gyliphicon font files
     file_attachments = c(
-      fonts = lib_file("bs-sass", "assets", "fonts")
+      fonts = lib_file("bs3", "assets", "fonts")
     ),
     html_deps = htmltools::htmlDependency(
       "bs3compat", packageVersion("bslib"),

R/files.R

@@ -6,18 +6,28 @@ bs4_sass_files <- function(x) {
   bs_sass_files(x, version = 4)
 }
 
+bs5_sass_files <- function(x) {
+  bs_sass_files(x, version = 5)
+}
+
 bs_sass_files <- function(files, version) {
   lapply(files, bs_sass_file, version = version)
 }
 
 # Search for one file at a time so we can throw informative errors
 bs_sass_file <- function(file, version) {
   if (length(file) != 1) stop("file should be of length 1")
-  file <- paste0("_", file, ".scss")
+
+  file <- file.path(
+    dirname(file),
+    paste0("_", basename(file), ".scss")
+  )
+
   f <- switch_version(
     version,
-    four = lib_file("bs", "scss", file),
-    three = lib_file("bs-sass", "assets", "stylesheets", "bootstrap", file)
+    five = lib_file("bs5", "scss", file),
+    four = lib_file("bs4", "scss", file),
+    three = lib_file("bs3", "assets", "stylesheets", "bootstrap", file)
   )
   if (f == "") stop("The bootstrap stylesheet '", file, "' doesn't exist.", call. = FALSE)
   sass_file(f)