Re: [PATCH] Marker symbol draw on sublines

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.

Neil

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