Re: GtkSourceView: code folding

On 08/12/2014 05:02 PM, Paolo Borelli wrote:
> Well, while it is true that we are not particularly interested in 
> getting this in gedit, but I still would very much welcome code 
> folding as a feature in gtksourceview.
>
> Note that there is a bug open in bugzilla that contains an 
> implementation of a folding API for gtksourceview, and the drawing 
> part was working quite nicely last time it was tested (but I am pretty 
> sure things have bitrotten in the mean time).
> Things were stuck because we wanted to implement the folding logic 
> itself based on the highlighter, but I think that is not a requirement 
> and we could merge an API that allows to fold part of the text, 
> leaving to the caller the logic of where to fold.
>
> I think I understood what you want to do with the text anchor: you 
> want a small clickable target within the buffer, something like [...] 
> to show that there is folded text. The code in the bug/branch I 
> mentioned had this feature, but I think it was done by simply drawing 
> on top of the text instead of inserting a widget.
>
Well, since I'm completely stuck with fixing the undo/redo 
functionality, maybe trying to add a child window overlay could be a 
good alternative to me (no spurious character inserted in the buffer = 
no undo stack corruption).
However I guess that synchronizing it with the scrolled buffer would be 
difficult too...

> If you would like to pick up that bug, compare the proposed 
> api/implementation with yours, and try to push things forward in 
> gtksourceview itself, it would be very welcome.  Beside, also 
> preliminary patches to undomanager or other parts to make your 
> implementation work would surely be considered.
Well, actually I'm not good at programming in plain C. My purpose is 
just to make a working compact C++ implementation. Of course if (and 
when) I'll manage to make it work, I'd be happy to share it.
>
> Ciao
>
>     Paolo
>
Ciao.