openPDF: open PDF file with sumatra viewer

Description

open PDF file with SumatraPDF viewer, which does not lock files against being edited. It is only available on windows, but comes bundled with Rstudio. If the executable is not found, openFile is called instead.
I suggest to first change some settings with sumatraInitialize().

Usage

openPDF(
  file,
  rspath = sub("rstudio.exe$", "", Sys.getenv("RSTUDIO_DESKTOP_EXE")),
  sumexe = NULL,
  ...
)

Value

Result of try(system, ...), invisibly

Arguments

file: Filename to be opened, as character string. Files not ending in ".pdf" are ignored with a warning.
rspath: The path to Rstudio files. DEFAULT: sub("rstudio.exe$", "", Sys.getenv("RSTUDIO_DESKTOP_EXE"))
sumexe: The path to SumatraPDF.exe. DEFAULT: Null: added to rspath, e.g. "C:/Program Files/RStudio/resources/app/bin/sumatra/SumatraPDF.exe"
...: Further arguments passed to system

Author

Berry Boessenkool, berry-b@gmx.de, May 2020

Examples

Run this code

# only desired in an interactive session, not on CRAN checks
# openPDF( system.file("extdata/Anhang.pdf", package="berryFunctions")  )
# openPDF( system.file(c("extdata/Anhang.pdf", "extdata/RainfallStationsMap.pdf"), 
#                      package="berryFunctions")  )