Re: change log file, navigate to the changes

Stephen> Have you looked at hyperbole? Mats> Unfortunately there is no such thing in hyperbole, yet. Mats> Triggered by this request I did some experiment, added an Mats> implicit change-log-mode button and tried to think about what Mats> could be done. Mats> * What comes first in mind is trying to come up with an implicit Mats> button. Mats> It all seems to get a bit complicated without really solving the Mats> requested functionality. Mats> * Creating an explicit button in the ChangeLog is not desirable I Mats> think!? (Excplicit means that an hyperbole button "<....>" Mats> is inserted. The link will be persistent but the ChangeLog Mats> will contain hyperbole buttons ...) Well I would not mind, if it where easy to create and to use. But of course as you said, I would like that when I run the modified add-change-log-entry, then the position of the change is stored and the link is set automatically. Mats> * What I think really is wanted is that a cross reference is created Mats> from the ChangeLog to from where add-change-log-entry was Mats> invoked. This should all take place behind the scene so Mats> that when clicking on that line in the ChangeLog you will Mats> be transfered back to where it all began. Mats> From a quick look at bm.el it doesn't seem to implement Mats> this but rather create a visible bookmark to which you can Mats> jump from the bookmarks associated with that file. Right Mats> Maybe that idea could be taken further and any line in a Mats> buffer could be the starting point for a cross reference to Mats> a position in another file. Then a modified Mats> add-change-log-entry could update that cross Mats> reference. However this transfers the problem into how to Mats> update the cross reference when the originating file is Mats> changed which doesn't seem to be trivial. Right, this a problem in bm and in bookmark.el. However bookmark has a clever idea (which was then implemented by bm as well): not only store the char position, where the change occurred, but store also some strings before and after the change (this is called front-context-string and rear-context-string) in order take into account a possible change of the file later. Example ^ indicates where the change occurs ,---- | This is a line | here I will change tis | ^ | another line. `---- Then the cursor position - ^ is stored together with the strings - "change" and - "another" Then when I make changes of the form ,---- | a new line | This is a line | here I will change tis | ^ | another line. `---- Then everything is fine and the ^ can be found. The question reminds were to store all that information. I see three possibilities: - In the change log file (but may be in the non visible part). However that might be complicated - In a global file in the home directory - In a file associated which every changelog file Uwe Brauer _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-beta