Re: Unwanted information in PDF files

From: Peter Rolf <indiego@gmx.net>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Unwanted information in PDF files
Date: Wed, 12 Dec 2007 14:18:58 +0100	[thread overview]
Message-ID: <475FDFC2.9050609@gmx.net> (raw)
In-Reply-To: <fjnl8j$ko9$1@ger.gmane.org>

Maurício schrieb:
> Hi,
> 
> After generating a PDF from a .tex file,
> I changed the name of the resulting PDF to
> something else. But when I open that file in
> 'evince', it still shows the old file name.
> 
> I opened that file in emacs in saw that I lot
> of info is stored in the PDF file: original file
> name, creation date, "generated by Context" etc.
>
Hit Ctrl-D in Acrobat (while viewing the document),
tabs "Description" and "Custom"...

> That can be a problem sometimes. For instance,
> someone wouldn't want to write a file like
> 'I_hate_my_job.tex' and then change the result
> to 'report_to_boss.pdf', just to see his manager
> opening the file and reading the first name. Or,
> in my situation, write a file with special
> Unicode characters and see evince show the file
> name as bogus characters.
>
Not the best example, but in general I agree. In my special case I don't
want the overhead for smaler standalone metapost graphics (for inclusion
only).

> How can I instruct Context not to write anything
> inside the PDF file that I have not asked for?
>
There is currently no interface for this. But you are free (with the
risk of breaking things now or in the future) to change the code for
your needs.

Add this to a standalone file (reporttoboss.tex?) for inclusion and
comment the info you don't want:

\unprotect
% code taken from spec-fdf.tex

\def\doPDFsetupidentity#1#2#3#4#5#6%
  {\bgroup
   \enablePDFdocencoding
   \edef\!!stringa{#5}%
   \ifx\!!stringa\empty \ifx\pdfdate\undefined\else
     \edef\!!stringa{D:\pdfdate}%
   \fi \fi
   \expanded{\doPDFaddtoinfo
     {/Title (#1)
      /Subject (#2)
      /Author (#3)
      /Creator (#4)
      /ModDate (\!!stringa)
%%      /ID (\jobname.\!!stringa) % needed for pdf/x
      /Keywords (#6)}}%
   \egroup}

\def\addPDFdocumentinfo
  {\doPDFaddtocatalog{\currentPDFpagemode\currentPDFviewerprefs}%
   \doPDFaddtocatalog{/Version \ifdim\PDFversion00\points>100\points
1.\fi\PDFversion}%
   \doPDFaddtoinfo{/Trapped /False}% !leave unchanged!
   \doPDFaddtoinfo{/ConTeXt.Version (\contextversion)}%
   \doPDFaddtoinfo{/ConTeXt.Time
(\number\normalyear.\twodigits\normalmonth.\twodigits\normalday\space
\twodigits\currenthour:\twodigits\currentminute)}%
%%   \doPDFaddtoinfo{/ConTeXt.Jobname (\jobname)}%
   \doPDFaddtoinfo{/ConTeXt.Url     (www.pragma-ade.com)}}

\protect
\endinput

See the pdf reference manual for more details. And better check from
time to time if things have changed. This is ConTeXt ;)

Regards, Peter

> Thanks,
> Maurício
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
> 

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________