On 3/29/2006 2:49 AM, Prof Brian Ripley wrote: > On Tue, 28 Mar 2006, Duncan Murdoch wrote: > >> On 3/28/2006 11:00 AM, Prof Brian Ripley wrote: >>> Rgui now supports \r in the same way as rterm. >> I notice that there's a slight change to the colour scheme: now the prompt >> ">" is in foreground colour, rather than user colour. This might make sense >> (it's printed by the system, after all), but it looks a little strange at >> first. > > Yes, it was intentional. The problem is that you can now do > >> cat("abcde\rf") > > and then the next line will be > > f> de > > with the cursor on the 'd'. There is no longer a left-right divide > between system output and user input, as you can have output to the right > of user input. The previous behaviour was to mark as system output all > the columns up to the 'e' here, so when you started entering new input it > looked very odd indeed, changing colour in mid-word. > > I can change to making the prompt be explicitly regarded as user input, > which would be backwards compatible and less odd in cases like this.
I'd lean towards backwards compatibility here, but don't have a strong preference. It's less than perfect that the de is shown as user input, but fixing that would require a pretty large change to the console code. Duncan Murdoch > >> Duncan Murdoch >> >> >>> On Sun, 19 Mar 2006, Duncan Murdoch wrote: >>> >>>> On 3/18/2006 2:39 PM, Duncan Murdoch wrote: >>>>> On 3/17/2006 9:44 AM, Jeffrey Racine wrote: >>>>>> Hi, and thanks in advance for your time. >>>>>> >>>>>> Background - I am working on a package and wish to have a routine's >>>>>> progress reported. The routine can take some time, and I would like to >>>>>> inform the user about the routine's progress. I have scoured the >>>>>> archives but to no avail, so would like to solicit input from this list. >>>>>> >>>>>> I am successfully using >>>>>> >>>>>> cat("\rBootstrap replication ", i, " of ", boot.num,) >>>>>> flush.console() # To flush stdout on windows systems >>>>>> >>>>>> which works as expected on *NIX systems and using Rterm under windows. >>>>>> However, under Rgui the carriage return \r is ignored, and I certainly >>>>>> don't want to use the newline escape sequence \n. Under Rgui it appears >>>>>> as >>>>>> >>>>>> Bootstrap replication 1 of 399Bootstrap replication 2 of 399Bootstrap... >>>>>> >>>>>> but I want it to function properly if at all possible. >>>>>> >>>>>> My question is simply whether there is a portable way to implement this >>>>>> so that it works regardless of the R platform the user may be working >>>>>> on? >>>>>> >>>>>> Many thanks for any/all suggestions. >>>>> I've just been looking at the source code for this. I think it will be >>>>> relatively easy to make \r in Rgui do a destructive CR (i.e. it will >>>>> return to the start of the line, but clear any existing characters). >>>>> I'll play around a bit and then do that for R-devel. >>>> Oops, this was a bad idea. I did commit the change for a while, but >>>> have reverted it now. >>>> >>>> It seems that the help system displays help pages by writing CR LF at >>>> the end of each line; the CR is \r, and my change above caused it to >>>> wipe out the line it had just written. The help pages ended up >>>> completely blank. >>>> >>>> I may look into supporting \r as a non-destructive CR, but that's >>>> harder, because it means low-level changes to the console display. >>>> Right now it only writes to the end of the text buffer; this would mean >>>> it would sometimes write to a spot before the end. I don't think it >>>> would be impossible to do, but it will take more time than I have right >>>> now. >>>> >>>> Duncan Murdoch >>>> >>>> ______________________________________________ >>>> R-help@stat.math.ethz.ch mailing list >>>> https://stat.ethz.ch/mailman/listinfo/r-help >>>> PLEASE do read the posting guide! >>>> http://www.R-project.org/posting-guide.html >>>> >> > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html