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Re: session management with desktop and window configuration

From: Richard Riley
Subject: Re: session management with desktop and window configuration
Date: Thu, 31 Dec 2009 17:16:44 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Lennart Borgman <address@hidden> writes:

> On Thu, Dec 31, 2009 at 2:21 PM, Kiwon Um <address@hidden> wrote:
>> martin rudalics <address@hidden> writes:
>>>> I'm now using desktop.el for managing sessions. When I do desktop-
>>>> read, it restore all files opened before well. Then, I'm wondering if
>>>> there is any way to restore window configuration as well in easy way.
>>>> Firstly, I tried to add some functions to the desktop hooks as
>>>> follows:
>>>>   (add-hook 'desktop-save-hook '(window-configuration-to-register ?0))
>>>>   (add-hook 'desktop-after-read-hook '(jump-to-register ?0))
>>>> However, it didn't work at all.
>>>> The register-base window configuration save/restore are perfect to
>>>> what I want. But I don't know how to integrate it with desktop. Please
>>>> give me help.
>>> You can't do this with desktop at the moment.  The basic problem is that
>>> we currently cannot read window configurations from a file - a window
>>> configuration can only be saved in memory and retrieved from there.
>>> This obviously means that when you exit Emacs your saved window
>>> configurations are lost forever.  In this context note also that you
>>> can't cleanly restore a window configuration in one and the same session
>>> if you have deleted its frame in the meantime.
>>> Basically you should be able to write a configuration to a file as a
>>> sequence of `split-window' functions (and some interspersed window
>>> resizings) and execute these commands when you restart Emacs.  But you
>>> might end up getting only an approximation of the earlier configuration
>>> partly due to the quite unpredictable behavior of the current window
>>> resizing code which can, for example, deliberately delete windows when
>>> they become too small.
>>> I'm currently contemplating functions that write window configurations
>>> to a file and read them from there.  This way I can circumvent the
>>> window splitting mechanism and directly construct a window-tree from the
>>> information on the file.  This should solve the problem for you.
>>> Meanwhile you could try out ECB which does something similar to what you
>>> want.
>>> martin
>> Thanks for your reply. So, I wrote some functions using revive.el:
>> (require 'revive)
>> (defun kiwon/save-window-configuration ()
>>  (write-region (concat "(restore-window-configuration '"
>>                        (prin1-to-string 
>> (current-window-configuration-printable))
>>                        ")")
>>                nil ".emacs.restore-window.el"))
>> (defun kiwon/restore-window-configuration ()
>>  (when (file-exists-p ".emacs.restore-window.el")
>>    (load-file ".emacs.restore-window.el")))
>> (add-hook 'desktop-save-hook 'kiwon/save-window-configuration)
>> (add-hook 'desktop-after-read-hook 'kiwon/restore-window-configuration)
>> It seems to be enough to what I wanted. :)
> Nice. I have seen revive but have not looked into it. There is also
> winsav.el in nXhtml that can save and restore frames and windows.
> (Martin, I am a bit surprised that you do not know about it. Didn't I
> tell about this before?)

windows.el does for me.


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