Use rstudio::previewRd, if available.

Closes #322
r-lib · Oct 7, 2013 · c8d4d2d · c8d4d2d
1 parent 2adcc2e
commit c8d4d2d
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Showing 3 changed files with 15 additions and 2 deletions.
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -26,7 +26,8 @@ Suggests:
     BiocInstaller,
     Rcpp (>= 0.10.0),
     MASS,
-    knitr
+    knitr,
+    rstudio
 License: GPL (>= 2)
 Collate:
     'R.r'

diff --git a/R/dev-help.r b/R/dev-help.r
@@ -26,7 +26,12 @@ dev_help <- function(topic, stage = "render", type = getOption("help_type")) {
   }
 
   pkg <- basename(names(path)[1])
-  view_rd(path, pkg, stage = stage, type = type)
+  if (rstudio_has("previewRd")) {
+    rstudio::previewRd(path)
+  } else {
+    view_rd(path, pkg, stage = stage, type = type)  
+  }
+
 }
 
 

diff --git a/R/utils.r b/R/utils.r
@@ -20,3 +20,10 @@ ends_with_newline <- function(path) {
   lastByte <- readBin(conn, "raw", n = 1)
   lastByte == 0x0a
 }
+
+rstudio_has <- function(f = NULL) {
+  if (is.null(f)) return("tools:rstudio" %in% search())
+
+  exists(as.character(f), asNamespace("rstudio"))
+
+}