Re: [PATCH] Marker symbol draw on sublines

Hi Neil,

> On Jun 4, 2025, at 2:05 AM, Neil <[email protected]> wrote:
> 
> Mitchell:
> 
> I chose to use marker symbols instead of marker numbers because (1) it easily supports the existing SC_MARK_BAR and (2) enabling it for individual marker numbers seems tedious. If you disagree, I can resubmit with support for marker numbers instead.
> 
> I'm a bit uncertain for now.
> 
> It does seem more coherent to me for this to be an attribute of a marker number as that allows using a marker both for just head-lines or for both head-lines and body-lines.
> 
> Further extensions might want to follow more of the FoldPart technique used for MarkerSymbol::Bar with 4 bit flags to determine if the marker is drawn for head, body, tail, and headWithTail cases.
> 
> A simpler addition would be to have a continuing (or flowing?) variant of SC_MARK_FULLRECT: SC_MARK_FULLRECT_SUBLINES. There's likely only a small set of other marker symbols that are good candidates for this because they join up: SC_MARK_BACKGROUND and SC_MARK_LEFTRECT.

I am okay with defining a few new subline-enabled markers as you suggest.

With my proposed solution, I was also thinking of handling cases where clients define pixmap markers like error or warning icons that they might want to show on all wrapped lines, but I don’t personally have a use-case for that.

Cheers,
Mitchell

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