[reportlab-users] Bug in invariant?

[Roberto Alsina]

Hello, when trying to generate PDFs with invariant=1 in local_rl_config.py so 
that tests don't fail because of timestamps in rst2pdf we found that files 
still were different when generated by two persons.

And the difference was this:

$ ls -l 65* 
-rw-r--r-- 1 ralsina users 16703 2009-10-31 16:34 65_patrick.pdf 
-rw-r--r-- 1 ralsina users 16703 2009-10-31 16:35 65_roberto.pdf 

The only difference between them is... 

 /CreationDate (D:20000101000000+06'00') 

 /CreationDate (D:20000101000000+03'00')

As you can see, the date is being fixed, but the timezone is not. I suspect 
when the support for gmt offset was added, this slipped.

The fix is to change PDFDate like this (or something similar):

class PDFDate:
    __PDFObject__ = True
    # gmt offset now suppported
    def __init__(self, invariant=rl_config.invariant, dateFormatter=None):
        if invariant:
            now = (2000,01,01,00,00,00,0)
            self.dhh = 0; self.dmm = 0
        else:
            import time
            now = tuple(time.localtime(_getTimeStamp())[:6])
            from time import timezone
            self.dhh, self.dmm = timezone // 3600, (timezone % 3600) % 60
        self.date = now[:6]
        self.dateFormatter = dateFormatter

    def format(self, doc):
        dfmt = self.dateFormatter or (
                lambda yyyy,mm,dd,hh,m,s:
                    "D:%04d%02d%02d%02d%02d%02d%+03d'%02d'" % 
(yyyy,mm,dd,hh,m,s,self.dhh,self.dmm))
        return format(PDFString(dfmt(*self.date)), doc)


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 ("\''/").__..-''"`-. .         Roberto Alsina
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