Add support for the BrailleR package (#4461)

Author: thomasp85

NEWS.md

@@ -1,5 +1,8 @@
 # ggplot2 (development version)
 
+* Add support for the BrailleR package for creating descriptions of the plot
+  when rendered (@thomasp85, #4459)
+
 * Fix a bug in the layer implementation that introduced a new state after the 
   first render which could lead to a different look when rendered the second 
   time (@thomasp85, #4204)

R/plot.r

@@ -179,6 +179,10 @@ print.ggplot <- function(x, newpage = is.null(vp), vp = NULL, ...) {
     upViewport()
   }
 
+  if (isTRUE(getOption("BrailleR.VI")) && rlang::is_installed("BrailleR")) {
+    print(asNamespace("BrailleR")$VI(x))
+  }
+
   invisible(x)
 }
 #' @rdname print.ggplot