Re: MY window tree!

[Juanma Barranquero]

On 1/15/07, Lennart Borgman (gmail) <lennart.borgman@gmail.com> wrote:

> I have actually changed that to just change the 'window property of the
> overlays. No overlays are normally copied any more.

Ah, good.

> If the window object
> that the 'window properties points to is not a valid window any more
> then I just replace that value with a pointer to the new window that
> have replaced the old one.

I think the right thing to do would be a bit more complicate:

1) search every displayed buffer and make a list of all overlays
associated to windows, and which windows are they associated to (one
list for window, I suppose).
2) do your mumbo-jumbo with windows
3) determine which window corresponds to every buffer now
4) process the lists of 1) above and modify only those overlays that
pointed to a non-alive windows W1 that corresponds now to W2.

All this because there may be other valid reasons why a buffer
contains overlays with 'window properties pointing to a dead window.
You don't want them suddenly being visible in the wrong window, do
you?

> I guess that for most cases this will be sufficient. But there can still
> be cases where a mode (or some other code) have a persisting pointer to
> a window object. I can not replace this pointers.

Of course.

> I would suspect that this situation is not very common, but I am not
> sure. I am not aware of any such case at all so please tell me so I can
> get a better picture of this.

I'm no aware either. I'm just pointing out that there's a reason this
hasn't been done earlier in elisp :)

                   /L/e/k/t/u