Re: region_highlight cancels styles set in zle_highlight

[Peter Stephenson <p.stephenson@samsung.com>]

On Mon, 7 Sep 2015 02:08:14 +0000
Daniel Shahaf <d.s@daniel.shahaf.name> wrote:
> Peter Stephenson wrote on Sun, Sep 06, 2015 at 18:22:30 +0100:
> > On Sat, 5 Sep 2015 10:44:49 +0000
> > Daniel Shahaf <d.s@daniel.shahaf.name> wrote:
> > > How do $zle_highlight and $region_highlight interact?  Which one takes
> > > precedence if a certain byte range is covered by both?
> > 
> > The special forms of highlight (the ones that apply to regions, so not,
> > for example, unprintable characters) are treated as the initial set of
> > entries in the array of highlights to apply, with any user-specified
> > ones in region_highlight following in order, with later values
> > overriding earlier ones.
> 
> Thanks.  Patch to doc this:

Thanks, that's useful.

By the way, the code for this is fairly localised in
Src/Zle/zle_refresh.c, with the decisions made in the chunk of code at
the top of character loop in singlerefresh() after the comment
"Calculate attributes based on region": the special and user-defined
attributes have been coalesced into the array region_highlights at this
point.  So if there's a good argument for alternative or variant
behaviour it shouldn't be too difficult, by ZLE standards.

pws

-- 
Peter Stephenson | Principal Engineer Samsung Cambridge Solution Centre
Email: p.stephenson@samsung.com | Phone: +44 1223 434724 |
www.samsung.com