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On Apr 2, 2014, at 2:21 PM, Tom Davies <tomcecf@gmail.com> wrote:

Hi :)
I'm not clear why not jsut have everyone install Libreoffice alongside
whatever other programs they have and then encrypt the ODF files (odt
for text, ods for spreadsheets etc)
Regards from
Tom :)

Because:

1) There is not yet any LibreOffice for Android or iOs
2) It defeats the purpose of any encryption if a person can open the file, then save it in any 
format
3) It allows someone to open the file, make changes, and do what they want with it.

While this is intended to go out to my friends, there are cases where I (and others using it) might 
need to include someone they don’t know but so well.


Hal


On 2 April 2014 18:48, Hal Vaughan <lists@halblog.com> wrote:
I'm working on an e-reader for special purposes.  While I don't want to go into a discussion of 
the point of this program and why I'm doing another, a brief summary may help.  As a writer, I 
don't like sending my work over email or other insecure methods of internet transfer.  This 
e-reader would let me (and my writer friends) share our work easily with our friends while 
keeping it encrypted during transfer and even on the reader's computer.  The file is read in and 
decrypted when displayed for reading.  This would also let me make early drafts expire so they 
can be ditched when they're obsolete.

I still haven't decided what language to use for this.  Initially it'll work on OSX, Windows, 
and Linux.  I'd like to expand it to Android and iOS.  There's a good chance it'd be in C++ or 
Java, but it would be great if I could do it in Python.  (I know of Kivy and other efforts that 
would make it easy for me to transport Python to at least Android.)

The problem is I need some kind of portable document format.  I know that implies, immediately, 
PDF.  However, there seems to be only one library that handles PDF display, and that's Poppler.  
I'm not an expert programmer (at least not in C++), and when I've asked for help from the 
Poppler people, they've been abrupt and less than helpful.

I'd like to be able to write in LO, then save or export my file, and have it in a format I can 
easily display on the different operating systems.

I tried saving some files in HTML.  The plain text ones were no problem at all.  Margins and 
formatting was preserved just as I needed it.  But then I tried one that was part of a pitch, so 
it had a page of text, then a page of pictures, basically two columns of pictures with captions 
below each picture.  I loaded that in a browser and the formatting was okay on the first page, 
but was totally messed up on the 2nd page with the pictures.

As best I can tell, at this point, there is not a portable library out there that I can use from 
within a program to easily display ODT files, but that would be a great solution.

So what format can I use when exporting from LibreOffice, other than PDF, that can be easily 
displayed by any libraries in either Java, C++, or Python?


Thanks!



Hal
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