[TxMt] Re: Cursor position in bytes

[Allan Odgaard]

On 10 Aug 2016, at 8:45, Jacob Carlborg wrote:

> > On 09 Aug 2016, at 20:59, Allan Odgaard <mailinglist at textmate.org> 
> wrote:
>>
>> We can provide this as a variable but the user can have multiple 
>> insertion points, column selections, and place carets beyond 
>> end-of-line or a tab character.
>>
>> Any suggestion as for how to provide this info?
>
> I was thinking a new environment variable. Is it any different than 
> TM_LINE_NUMBER?

The “line number” does not need to care about most of what I 
mentioned above, ideally it would reflect when there are carets on 
multiple lines, but as the variable was introduced before this was a 
feature, we cannot extend the format without breaking existing stuff and 
instead a new variable was introduced with exact information 
(`TM_SELECTION`).

The format of `TM_SELECTION` is:

     selection    = <range> ('&' <range>)*
     range        = <pos> | <normal_range> | <column_range>
     pos          = <line> (':' <column>)? ('+' <offset>)?
     normal_range = <pos> '-' <pos>
     column_range = <pos> 'x' <pos>
     line         = [1-9][0-9]*
     column       = [1-9][0-9]*
     offset       = [1-9][0-9]*
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