[Toybox] [PATCH] vi: added backspace

[enh]

i think there's a catch-22 there though --- the trouble is that until
an editor meets the "good enough that i'm using it to develop itself"
bar, it really struggles to make much forward progress.

On Wed, Feb 1, 2023 at 2:02 PM Jarno Mäkipää <jmakip87 at gmail.com> wrote:
>
> On Wed, Feb 1, 2023 at 11:19 PM enh <enh at google.com> wrote:
> >
> > heh, to be clear: i wasn't "dissing" drive-by patching. it accounts
> > for at least 80% of my entire career :-)
> >
> Yeah I understood that. Just made joke since this will probably be
> just one off patch unless I actually gather some motivation somewhere
> to actually work on this again :)
> I just happened to have file open and remembered that insert mode was
> very wonky for typical "arrow keys user" and already knew how to fix
> it. I was intending this as quality of life update with minimum
> effort.
>
> > i use the term just to acknowledge that for some things -- like this
> > -- there isn't anyone else who's actually working on the thing full
> > time, which is my personal rationale for wanting "the simplest thing
> > that could possibly work", and why my definition of "simple" is
> > something like "the most easily understood by an average programmer
> > who hasn't seen this particular code before".
>
> Implementing gap buffer wold simplify some aspects of program. Mainly
> by allowing some direct usage of familliar standard c library
> functions for string manipulation and searching.
>
> But I think best way to keep it simple is just to limit features.
>
> >
> > (and, yes, in addition to the open() error -- which at least led to a
> > small simplification of the code -- i've shot myself in the foot by
> > forgetting that there even are vi tests, not running them, and
> > breaking them with my recent commit, which i'll have to do something
> > about before i can sync to AOSP. i'll admit i'm very tempted to just
> > locally ignore those tests for now so i can get people kicking the
> > `tar --sort=name` tires asap, and coming back to worry about vi
> > later!)
> >
> > On Wed, Feb 1, 2023 at 12:52 PM Jarno Mäkipää <jmakip87 at gmail.com> wrote:
> > >
> > > Drive by patching :)
> > >
> > > Added better backspace support, now cuts in both insert and normal
> > > mode and also original text and not just what is in temporary buffer.
> > > Fix arrow key behavior on insert mode slightly by inserting what ever
> > > has been typed before moving.
> > >
> > > -Jarno
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