[Nano-devel] tabsizes and indentsizes

[Benno Schulenberg]

On Fri, Jun 10, 2016, at 03:09, Mike Scalora wrote:
> Right now tabsize is global (from the .nanorc) or overridable by
> session (command line arg) but for me tabsize (and TABTOSPACES and
> indent size) has been more file type and/or project related. CSS files
> are sometimes two column indents with js files 4 column in the same
> project. Some filetypes are tab-to-spaces while others are used with
> tabs by convention.
> 
> I've spent a lot of time thinking about tabs and indents while I been
> working on the code to make it more predictable and add undo support.
> 
> Proposal:
> 
> To allow filetype specific settings in .nanorc for tabsize, indentsize
> & tab-to-spaces:
> 
>   # global defaults (and for legacy and COLORless support)
>   set tabsize 8
>   set indentsize 4

No, indentsize has always been the same as tabsize.  So the
backward-compatible setting would be:
  set indentsize 8

>   set tabstospaces

Also here, the default is:
  unset tabstospaces

>   # syntax specific settings
>   syntax "c" "\.[ch]$"
>   tabsize 8
>   indentsize 4

Is there anyone who uses tabsize != indentsize?  Yes, nano does,
but that is a /bad/ example.

Also, we can't set any tabsize or indentsize in any of the example
syntaxes, because they would override what the user has set in
their ~/.nanorc. (with the 'set' command, not with 'extendsyntax').

> I'm not quite sure what the syntax should be for setting tabstospaces
> on/off for a syntax without breaking compatibility.
> 
>   syntax "html" "\.html$"
>   tabstospaces
> 
>   extendsyntax "css" notabstospaces

Don't know.  Don't want to go there.

> For the command line, I've implement a new --indentsize and added
> support to --tabsize to optionally take two values with a comma for
> tabsize,indentsize.
> 
> nano -T 8,4 src/text.c

Hm.  Two different ways to set indentsize on the command line?
Don't like that.

Benno



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