[QScintilla] Merit of proposed signals markerLineDeleted() and markerLineUndelete()

[Daniel J Sebald]

Hi Folks,

I was working with QScintilla the other day and found it reasonably easy 
to work with, thanks.

I did find one behavior to be problematic.  It is when a line is deleted 
which contains a marker.  When non-marker lines are added or deleted, 
lines having markers adjust appropriately, and one is able to access 
that line number via marker handle.  All good.

However, when a line is delete that has a marker, that marker becomes 
associated with a line that still remains in the edit window.  I realize 
there is some question as what to do in that case.  However, if 
QScintilla had two signals

markerLineDeleted (int mhandle, int linenr)
markerLineUndeleted (int mhandle, int linenr)

or something similar then the programmer could act accordingly to, for 
example, remove that marker or maybe change the marker to some other 
marker indicating questionable location.

I've also noticed if the line in which there is a marker is deleted (and 
the marker goes to another line), when the "undo" button is pressed and 
the deleted line restored, the marker doesn't go back to the original 
line but stays at the line post delete.  Could that be fixed to have the 
marker go back to the original line?

If there were a markerLineDeleted (mhandle, linenr), the programmer 
could record the linenr at the time it was deleted.  Then if there is a 
markerLineUndeleted (mhandle, linenr) signal, the programmer could move 
the marker back to its position at the time it was deleted.

What are you thoughts?

Thanks,

Dan Sebald