Make ooxml-handles work in odp

[Regina Henschel]

Hi Miklos,

Miklos Vajna schrieb am 05-Aug-19 um 09:26:
> Hi Regina,
> 
> On Sun, Aug 04, 2019 at 02:19:49PM +0200, Regina Henschel <rb.henschel at t-online.de> wrote:
>> Is there a way to tell at this point whether the current file has an 'ooxml'
>> format?
> 
> The custom shape type is a string, always in the format of ooxml-"preset
> name" for custom shapes coming from OOXML. Would that help your
> situation?

No. If you open a file which was originally produced by PowerPoint, the 
shape gets a "ooxml-foo" shape type. When you then save the file to .odp 
format, the shape type is stil "ooxml-foo". So when you then open the 
.odp file, you have "ooxml-foo" too. Since you cannot use the prefix 
"ooxml-" to distinguish the file formats.

Kind regards
Regina