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bug#17537: x-window-property doesn't work for most properties


From: Jeremy Maitin-Shepard
Subject: bug#17537: x-window-property doesn't work for most properties
Date: Wed, 21 May 2014 00:57:28 -0700

Okay.  What about making it work when specifying a frame, and building with a toolkit?  It seems there is an outer-window-id (which is the top-level window as far as the window manager and other X programs like xprop are concerned), and then there is window-id. 

While I see now that this can be worked around in elisp, shouldn't x-window-property use outer-window-id when a frame is specified, since that is almost certainly what is desired?


On Wed, May 21, 2014 at 12:27 AM, Andreas Schwab <address@hidden> wrote:
Jeremy Maitin-Shepard <address@hidden> writes:

> x-window-property seems to return nil for most properties.
>
> (x-window-property "WM_HINTS")  -> returns non-nil
>
> (x-window-property "WM_NAME") -> returns nil even though the property is
> set (and displayed by xprop)
>
> (x-window-property "_NET_WM_STATE") -> returns nil even though property is
> set
>
> In fact I haven't found any property I can read other than WM_HINTS.

You can, if you use the same window id for the target window as xprop
(or build emacs without toolkit).

Andreas.

--
Andreas Schwab, SUSE Labs, address@hidden
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