[reportlab-users] Font re-registration annoyance

[Dinu Gherman]

Hi!

I have some code which might try to register a TrueType font
multiple times. It's more convenient like this, although my code
could be smarter an avoid registering the font more than once.

Without that smarts I get the traceback below for the attached
code snippet, which does surprises me a bit. While I can change
my own code to handle this, I might not be able to change code
from others that uses fonts inside external Platypus flowables.

Therefore, I think that detecting the re-registration of a font
might be something to be moved / developed into the RL code base
itself.

Regards,

Dinu

PS: Tested on Python 2.4, RL 2.0, with the TTF "Code2000"
     and the TTF "Rina" (included in RL 2.0).


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localhost:~/dev/test dinu$ /opt/bin/python2.4 test_register_fonts.py
Traceback (most recent call last):
   File "test_register_fonts.py", line 47, in ?
     main()
   File "test_register_fonts.py", line 43, in main
     canv.save()
   File "/opt/lib/python2.4/site-packages/reportlab/pdfgen/canvas.py", 
line 843, in save
     self._doc.SaveToFile(self._filename, self)
   File "/opt/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 
line 218, in SaveToFile
     f.write(self.GetPDFData(canvas))
   File "/opt/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 
line 230, in GetPDFData
     fnt.addObjects(self)
   File "/opt/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", 
line 1099, in addObjects
     pdfFont.ToUnicode = doc.Reference(cmapStream, 'toUnicodeCMap:' + 
baseFontName)
   File "/opt/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 
line 459, in Reference
     raise ValueError, "redefining named object: "+repr(name)
ValueError: redefining named object: 'toUnicodeCMap:AAAAAA+Code2000'