[pygtk] Search for paragraph separators in a TextBuffer

[Francesco Marchetti-Stasi]

Hello,

I wrote a small editor targeted at handhelds, which I used to use on an 
ipaq and which is now running on a Zaurus. For a bettere use of the 
higher screen resolution, I need a new simple feature: paragraph 
justification, where a paragraph is a block of text delimited by empty 
lines (I am using this editor mainly on TeX files). Therefore, I start 
by jumping at the beginning of the paragraph, as follows:

         buffer = self.get_buffer()
         curr = buffer.get_iter_at_mark(buffer.get_insert())
         res = curr.backward_search('\n\n', 0)
         if res:
             par_start = res[1]
         else:
             par_start = buffer.get_start_iter()
         buffer.place_cursor(par_start)


Apparently, this works if I am in the middle of the paragraph; but if I 
am at the very beginning, it finds a match somewhere FORWARD in the 
middle of the paragraph; and in some cases from the new position the 
cursor also jumps back to the second character in the paragraph, and 
there it stays if I keep on searching. I am really confused; am I doing 
something inherently wrong, did I miss something, or is this a bug?

I have pygtk 2.6.2 and python 2.4.2. Upgrading is not really feasible 
because I don't have enough RAM on my PC to run OpenEmbedded and 
recompile everything, so I am using precompiled packages.

Any hint is welcome... thanks!
Francesco.