Re: How to call WebKit.DOMDocument.evaluate function in python

[Simon Feltman <s feltman gmail com>]

On Tue, Jul 2, 2013 at 10:35 AM, Niranjan Rao <nhrdls gmail com> wrote:
> And yes, I had tried creating empty WebKit.DOMXPathResult object and
> passing it. Did not work.

It would be helpful to know the details of what didn't work. Code examples
of what you have tried, or steps to reproduce the problems you are seeing
can be invaluable for getting help. A simple example on my system shows
using an empty DOMXPathResult is actually working:

In [1]: from gi.repository import WebKit
In [2]: view = WebKit.WebView()
In [3]: dom = view.get_dom_document()
In [4]: dom.evaluate('/', dom, WebKit.DOMXPathNSResolver(), 0,
WebKit.DOMXPathResult())
Out[4]: <DOMXPathResult object at 0x7fc670b08eb0 (WebKitDOMXPathResult at
0x2ea90f0)>

This is with PyGObject/GTK+ version 3.8.2 (not sure about WebKit version).
If this does not work with older versions, supporting a fallback with
ctypes hacks sounds reasonable. This would allow support for older versions
while ensuring use of proper API on newer versions. If the __gpointer__
attribute is not available or not useful, you can still find the pointer to
the GObject by using offsets of the pointer field on the PyGObject wrapper.
But code examples of what you have already tried will be needed to further
aid you with this.

-Simon