From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Pohlack Subject: Re: Unhiding edited areas Date: Thu, 30 Jul 2009 20:50:34 +0200 Message-ID: <4A71EB7A.8060608@os.inf.tu-dresden.de> References: <4A71BF50.2050401@os.inf.tu-dresden.de> <20524da70907301110m208bc575jc1f18de4460cc56e@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MWahi-0001eA-6n for emacs-orgmode@gnu.org; Thu, 30 Jul 2009 14:50:14 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MWahd-0001cI-AW for emacs-orgmode@gnu.org; Thu, 30 Jul 2009 14:50:13 -0400 Received: from [199.232.76.173] (port=60750 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MWahd-0001cA-4f for emacs-orgmode@gnu.org; Thu, 30 Jul 2009 14:50:09 -0400 Received: from os.inf.tu-dresden.de ([141.76.48.99]:57328) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MWahc-0001fH-HT for emacs-orgmode@gnu.org; Thu, 30 Jul 2009 14:50:08 -0400 In-Reply-To: <20524da70907301110m208bc575jc1f18de4460cc56e@mail.gmail.com> List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org To: Samuel Wales Cc: emacs-orgmode@gnu.org Hi Samuel, Samuel Wales wrote: > Hi Martin, > > This is a huge issue.[1] > > Here is what I do to try to work around it. > > I use git, to limit the damage from confusion. Yes, this or a versioning filesystem is probably advisable. > I expand the entire buffer if I think I am about to be confused. > > ;;i like the idea of clustering undo but find it disconcerting > (setf org-self-insert-cluster-for-undo nil) > ;;somebody, I think Carsten, suggested this, and it might work for > you, but for some reason I commented it out. I don't remember what > the reason was. Maybe speed. > '(defadvice undo (after org-undo-reveal activate) > "Make point and context visible after an undo command in Org-mode." > (and (org-mode-p) (org-reveal))) > ;;(ad-unadvise 'undo) Awesome, this is exactly what I was looking for! > [1] It is even more important when combined with what is IMO Emacs's > greatest need for improvement, which is that you can undo, and undo an > undo, and this is considered to be sufficient since you can get > anywhere in the timeline in principle -- but many users, myself > included, prefer a true redo command, both because undoing an undo > does not let you do commands (such as copying) in the middle of an > undo sequence without going the other direction, and because it feels > more intuitive to tell emacs where in the timeline we want to go, and > go forward or backward if we overshoot, thus making it possible to > view the timeline the same way as we go backward and forward in any > linear sequence. (redo.el provides the functionality, but it corrupts > the buffer.) Of course, many are comfortable with the traditional > undo-the-undo mechanism, so that should stay possible, but there are > many who are not, and a redo mechanism would satisfy them. It is > possible to get more fancy with a tree. The current undo system is very powerful as it doesn't lose history (unless you hit a quota limit). With undo-redo systems you usually can lose history if you edit things in an old state. Suddenly redo is not available anymore. You can only access the most recent branch in the history tree. In emacs this will not happen as you can reach all nodes in the buffer history, but these states are not easily accessible, especially, if you went back and forth some times. I cannot track the list of states in my mind or imagine the current structure of the undo tree, I can only go step by step and look at the situation in the buffer and decide whether this is what I wanted or not. I recently stumbled upon an article which, I think, quiet nicely summarized what one wants: http://e-texteditor.com/blog/2006/making-undo-usable But it's not available for emacs ... Cheers, Martin