Re: [dwm] zooming a client by name

Actually I already pushed a patch which adds NET_ACTIVE_WINDOW
support to dwm...

Regards,
        Anselm

On Tue, Aug 08, 2006 at 04:52:10PM +0200, Anselm R. Garbe wrote:
> Hi David,
>
> On Tue, Aug 08, 2006 at 02:55:38PM +0100, David Tweed wrote:
> > dwm is small enough that I will probably have a go at
> > implementing this (very scarce spare time permitting
> > :-) ). What I'm just hoping to initiate in this e-mail
> > is a enough discussion to know if (a) such a feature
> > would be accepted into the main distribution and (b)
> > what architecture would be viewed as suitable.
> >
> > As far as I can see, there are two core requirements:
> >
> > (1) A way to ask dwm to output the names of the titles
> > of all the windows with the currently active tag.
>
> I'm not sure if the currently active tag would be sufficient,
> I'd prefer access to the global list. This can be queried
> without asking dwm, simply querying the window tree of X
> directly similiar to scan() of dwm:
>
> static void
> scan()
> {
> unsigned int i, num;
> Window *wins, d1, d2;
> XWindowAttributes wa;
>
> if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
> for(i = 0; i < num; i++) {
> if(!XGetWindowAttributes(dpy, wins[i], &wa))
> continue;
> if(wa.override_redirect)
> continue;
> /* TODO: ask for window's title */
> }
> }
> if(wins)
> XFree(wins);
> }
>
> > (2) A way to ask dwm to focus a window whose title is
> > the same as a given one.
>
> This is the only part, where dwm might provide a way to assist.
> EWMH defines the _NET_ACTIVE_WINDOW root window property, which
> can be set by clients to ask the window manager to focus a
> different window. The changes to achieve this look marginal to
> me (you need to set this hint when initializing the
> netwm[NetSupported] atom, beside setting the correct
> window id whenever focus() is performed (or unmanage())
> to this property.
>
> To enable dwm handling such activation requests you need to
> extend propertynotify() which might call view() and focus().
>
> Then only a utility is necessary which can be used as follows:
>
> wtool focus "`wtool list | wmiimenu`"
>
> Whereas wtool focus sets _NET_ACTIVE_WINDOW to the id of the
> window title supplied (if that can be queried), and wtool list
> outputs newline-separated list of all window titles currently
> run by the X server.
>
> > >From my philosophy, providing it fails gracefully,
> > there's no need to get corner cases "perfect". Off the
> > top of my head, these corner cases include the race
> > between getting the list of names and submitting the
> > focus request where a client exits, or changes its
> > title between times, or gets retagged. Likewise if
> > there's multiple clients with the same title.
>
> In such a case, first match will win. I won't bother for further
> cases, because it is indecidable anyways (and XQueryTree will
> find the bottom-most window first)...
>
> Regards,
> --
> Anselm R. Garbe ><>< www.ebrag.de ><>< GPG key: 0D73F361
>
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-- 
 Anselm R. Garbe  ><><  www.ebrag.de  ><><  GPG key: 0D73F361