R help - Sep 2021 - Word-Wrapper Library/Package?

Dear R-Users,


Does anyone know any package or library that implements functions for 
word wrapping?


I did implement a very rudimentary one (Github link below), but would 
like to avoid to reinvent the wheel. Considering that word-wrapping is a 
very common task, it should be available even in base R (e.g. in a 
"format" module/package).


Sincerely,


Leonard

======
The latest versions of the functions are on Github:

https://github.com/discoleo/R/blob/master/Stat/Tools.CRAN.R
# Note:
# - the function implementing word wrapping: split.N.line(...);
# - for the example below: the functions defined in Tools.CRAN.R are 
required;


Examples:
### Search CRAN
library(pkgsearch)

searchCran = function(s, from=1, len=60, len.print=20, extend="*",
 ??? ??? sep=" ", sep.h="-") {
 ??? if( ! is.null(extend)) s = paste0(s, extend);
 ??? x = advanced_search(s, size=len, from=from);
 ??? if(length(x$package_data) == 0) {
 ??? ??? cat("No packages found!", sep="\n");
 ??? } else {
 ??? ??? scroll.pkg(x, len=len.print, sep=sep, sep.h=sep.h);
 ??? }
 ??? invisible(x)
}

# with nice formatting & printing:
x = searchCran("text", from=60, sep.h="-")

scroll.pkg(x, start=20, len=21, sep.h = "-*")
# test of sep.h=NULL vs ...


Notes:

1.) split.N.line:

- was implemented to output a pre-specified number of lines (kind of 
"maxLines"), but this is not required from an actual word-wrapper;

- it was an initial design decision when implementing the format.lines() 
function; but I plan to implement a 1-pass exact algorithm during the 
next few days anyway;

2.) Refactoring

- I will also move the formatting code to a new file: probably 
Tools.Formatting.R;

- the same applies for the formatting code for ftable (currently in file 
Tools.Data.R);

3.) Package gridtext

- seems to have some word-wrapping functionality, but does not seem to 
expose it;

- I am also currently focused on character-based word wrapping (e.g. for 
RConsole);



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I think what you're looking for is 'strwrap', it's in package
base.

On Tue, Sep 28, 2021, 22:26 Leonard Mada via R-help <r-help at
r-project.org>
wrote:
> Dear R-Users,
>
>
> Does anyone know any package or library that implements functions for
> word wrapping?
>
>
> I did implement a very rudimentary one (Github link below), but would
> like to avoid to reinvent the wheel. Considering that word-wrapping is a
> very common task, it should be available even in base R (e.g. in a
> "format" module/package).
>
>
> Sincerely,
>
>
> Leonard
>
> ======>
> The latest versions of the functions are on Github:
>
> https://github.com/discoleo/R/blob/master/Stat/Tools.CRAN.R
> # Note:
> # - the function implementing word wrapping: split.N.line(...);
> # - for the example below: the functions defined in Tools.CRAN.R are
> required;
>
>
> Examples:
> ### Search CRAN
> library(pkgsearch)
>
> searchCran = function(s, from=1, len=60, len.print=20,
extend="*",
>          sep=" ", sep.h="-") {
>      if( ! is.null(extend)) s = paste0(s, extend);
>      x = advanced_search(s, size=len, from=from);
>      if(length(x$package_data) == 0) {
>          cat("No packages found!", sep="\n");
>      } else {
>          scroll.pkg(x, len=len.print, sep=sep, sep.h=sep.h);
>      }
>      invisible(x)
> }
>
> # with nice formatting & printing:
> x = searchCran("text", from=60, sep.h="-")
>
> scroll.pkg(x, start=20, len=21, sep.h = "-*")
> # test of sep.h=NULL vs ...
>
>
> Notes:
>
> 1.) split.N.line:
>
> - was implemented to output a pre-specified number of lines (kind of
> "maxLines"), but this is not required from an actual
word-wrapper;
>
> - it was an initial design decision when implementing the format.lines()
> function; but I plan to implement a 1-pass exact algorithm during the
> next few days anyway;
>
> 2.) Refactoring
>
> - I will also move the formatting code to a new file: probably
> Tools.Formatting.R;
>
> - the same applies for the formatting code for ftable (currently in file
> Tools.Data.R);
>
> 3.) Package gridtext
>
> - seems to have some word-wrapping functionality, but does not seem to
> expose it;
>
> - I am also currently focused on character-based word wrapping (e.g. for
> RConsole);
>
>
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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