[Rd] feature request for page() and options()

From: Deepayan Sarkar <deepayan.sarkar_at_gmail.com>
Date: Thu, 31 May 2007 13:54:44 -0700


Hi,

I have been playing around with a Qt based pager. One of the things I would like to be able to do is syntax highlighting for R code. This is mostly relevant with the page function, e.g.

page(ls)

The problem in this case is that the pager has no way of knowing whether the file it is showing contains R code (e.g. page(, method="print") need not produce valid R code); the name of the file is always produced by tempfile("Rpage."), so it looks like "/tmp/RtmpQfmyH8/Rpage.4a43d33f".

A simple solution is to use an appropriate file extension. Here's a trivial patch that implements this:

Index: src/library/utils/R/page.R


Unless there is a downside (or a better solution), I would like to see this feature added.

My second feature request is a bit more involved. options("pager") can be a function, which is how I have implemented my pager. I would like options("browser") and options("editor") to behave similarly, i.e. to have them be settable to functions as well. This seems to allow more flexibility, be consistent with S philosophy, and there shouldn't be any incompatibility as the defaults do not change.

This needs changes in a few different places, but if the idea seems acceptable, I am happy to supply a patch (I have a working implementation).

-Deepayan



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