Michael Stahl wrote:
> On 12.04.2015 22:53, Piet van Oostrum wrote:
> > I am trying to program a Global DocumentEventListener in Python.
> > Then on a certain event (e.g. File Open), I want to analyse/print the
> > paragraph structure of the document.
> >
> > I am running LibreOffice on port 2002. I am using the internal Python from
> > LibreOffice, but I run the script externally, from a Terminal.
> >
> > This is on Mac OS X 10.10, and LO 4.4.2.2.
> >
> > The listener works and gives output until I start an Enumeration, for
> > example enumerating the paragraphs. After the first element LO hangs
> > completely, and the only way out is to kill it. I have tried also with
> > enumerationg the TextFields in the document and it also hangs.
> >
> > So I am wondering if I do something illegal or unsupported, or that I have
> > hit a bug.
>
> looks like a deadlock, quite easy to reproduce, hope Stephan has some
> time to look at it:
Yes, it seems to lock a mutex without releasing it. Therefore the first
paragraph succeeds, but the second blocks because then the mutex is already
locked (that's how I estimate the situation).
This also happens with other sets of objects, for example, enumerating the
textfields, or accessing the masterfields. The latter doesn't use an
enumeration, but it still blocks:
def showmasterfields(doc):
masters = doc.getTextFieldMasters()
names = masters.ElementNames
print("Masters: {}".format(names))
for name in names:
print("Get master {}".format(name))
master = masters.getByName(name)
print(master)
The strange thing is that it only happens in a listener. When I use it
stand-alone it runs without problems, for example:
doc = Desktop.CurrentComponent
showportions(doc)
showfields(doc)
showmasterfields(doc)
--
Piet van Oostrum <p...@vanoostrum.org>
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]
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