GSoC applicant + EasyHack

Hello,

My name is Johnny and I'm a fourth year computer science student at
University of Waterloo from Canada. I am really interested in joining the
GSoC 2013 for LibreOffice and thus I have begin to work on a easy hack. The
one I have chosen was also listed as a bug at

https://bugs.freedesktop.org/show_bug.cgi?id=47302

As this is my first time developing with LibreOffice, I find it to be a fun
but challenging adventure. I am using opengrok to browse around the source
code and trying to implement "Inserting slide names" as another feature
under insert-> fields for Impress. However, as my learning process, one
problem that I can't figure out is how the field data for a page number for
a slide is retrieved. In particular, I am unsure of how the SvxPageField()
call at
http://opengrok.libreoffice.org/xref/core/sd/source/ui/view/drviewsb.cxx#518
actually
gets the current page number. The constructor SvxPageField as well as its
parent class constructor SvxFieldData (
http://opengrok.libreoffice.org/xref/core/editeng/source/items/flditem.cxx#228)
are
empty. I was hoping that someone could point me to the parts of the source
code that explains this behaviour and how the field data (e.g page number)
is retrieved.

Thank you and I look forward to hearing from you.

Sincerely,
Johnny