June 2009 - implementations-list - lists.ourproject.org

Re: [implementations-list] On the software design of a vi/vim core
by Marius Andersen 29 Jun '09

29 Jun '09

Jon, thanks for taking the time to share with us. Your scheme is very elegant; I particularly like how "motions" and "text objects" are seen as instances of a more general notion. I think the hardest part is keypress parsing. Simply binding keys like below won't do, as the second key binding will overwrite the first because it's more specific. That is, `daw' will work, but `dw' won't. (global-set-key "d" 'delete) ; reads motion (global-set-key "da" 'delete-an-object) ; reads text object Of course, we can solve this particular problem by modifying `delete' -- "if the next character is `a', then call `delete-an-object'", or some such. But this is a tedious approach. What we really want is an easy way to express the fact that it's possible to type d <motion> as well as d a <text object> so that when our next bright idea suggests itself, we can merrily break all vi conventions by adding d a æ <custom function> without having to rewrite `delete-an-object'. That is, we need some general representation (array, list) of what can follow what -- a "key grammar", if you will -- in place of the default approach of YAIE (Yet Another If Expression). (Viper has some scheme at its core, but it seems limited and the functions are littered with "special clauses" for things like macros etc. When I compare the comments with the actual code, I get the impression that Viper started off really beautiful and simple, but veered into complexity as the not-so-obvious complications of certain vi keys revealed themselves.) Any comments on this? Marius Andersen _________________________________________________________ Alt i ett. Få Yahoo! Mail med adressekartotek, kalender og notisblokk. http://no.mail.yahoo.com

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Re: [implementations-list] Vimpulse update
by Marius Andersen 29 Jun '09

29 Jun '09

> Fra: Alessandro Piras <laynor(a)gmail.com> > Emne: Re: [implementations-list] Vimpulse update > Til: "Vi/Vim implementations list" <implementations-list(a)lists.ourproject.org> > Dato: Mandag 22. juni 2009 13.34 > > it's easy stuff actually :) It works like this: > I modified the viper-prefix-arg-com function to introduce 4 > new commands: da di ca ci. These commands will read-char to get motion > command. Yes, this is a very good way to do it. It means more objects can be easily added without any more mucking around in `viper-prefix-arg-com'. Anyway, I mailed Michael Kifer and asked if there was a way to avoid redefining `viper-prefix-arg-com', and he replied he couldn't think of one. So until the original function is redesigned, which will probably not happen any soon, I think we can hold on to the present approach. :) What now remains is copying commands, `yiw', `yas', etc., and visual commands like `viw' and `vas'. The former requires updating `viper-prefix-arg-com' with entries for `vimpulse-yi' and `vimpulse-ya', while the latter is just a matter of writing commands for moving the cursor. For example, `vas' moves the cursor one sentence forward if it's at the end of the selection, and one sentence backward if it's at the beginning. I think this illustrates another point, incidentally: the power of vi comes from the multitude of ways of combining very basic commands, but implementing those combinations requires lots and lots of code. Therefore I think building vimpulse.el on top on Viper, rather than implementing Vim emulation from scratch, is the better approach. Marius Andersen _________________________________________________________ Alt i ett. Få Yahoo! Mail med adressekartotek, kalender og notisblokk. http://no.mail.yahoo.com

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[implementations-list] Where to report bugs (was: Vimpulse breaks inferior shells)
by Jason Spiro 24 Jun '09

24 Jun '09

On Wed, Jun 24, 2009 at 10:43 AM, Alessandro Piras<laynor(a)gmail.com> wrote: > Also, please report the bugs on the mailing list, not directly to me, thanks Not at http://my-trac.assembla.com/vimpulse/report/1 ? :-)

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[implementations-list] When and how to check code into SVN (was: text objects)
by Jason Spiro 24 Jun '09

24 Jun '09

On Wed, Jun 24, 2009 at 2:56 PM, Alessandro Piras <laynor(a)gmail.com> wrote: > I will switch to version 0.3.0 when I'll get repeatable visual commands XD > I'm also thinking about improving visual block mode, and refactor the code a > little ^^ > Actually, I'm already working on a multiple file version, I split the code > into several files hat should contain more or less separate functionalities, > as navigating thru a big file usually bothers me quite a lot, especially > when there are huge functions like the redefinition of viper-prefix-arg-com. > Anyway, it's still possible to redistribute vimpulse as one big file, and > there's a ready Makefile that does the job. > What do you think? better to upload the split file version now or when I'm > done with the visual command repetition stuff? It doesn't matter when you check the split file version into SVN. But it's best if the splitting checkin doesn't involve any code changes; make all code changes in a separate checkin. By the way, have you been bumping the version number and making a new release on EmacsWiki every time you checked in code? You don't have to. You can make a release just every few weeks or so. Also, it's possible to set things up so that a mail goes to the mailing list every time you make an SVN checkin. BTW I like that the version vimpulse.el on EmacsWiki is one big file I can simply download and install :) Cheers, -Jason

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[implementations-list] There are dozens of other Vi/Vim implementations (was: Maciej's from-scratch Vim emulation project)
by Jason Spiro 24 Jun '09

24 Jun '09

On Mon, Jun 22, 2009 at 4:37 PM, Jason Spiro <jasonspiro3(a)gmail.com> wrote: ... > Hi Maciej, > > I was discussing other vi clones for Emacs with Alessandro over Gtalk > today. I mentioned John J. Foerch's http://jjfoerch.com/modal-mode/ > and your project. Dear list: Note that there are dozens of other Vi and Vim clones and implementations. There's a list of them at http://texteditors.org/cgi-bin/wiki.pl?ViFamily ; six different ones on the list work inside Emacs. (Look next to where the page mentions Vimpulse.)

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[implementations-list] text objects
by Alessandro Piras 24 Jun '09

24 Jun '09

I noticed the code for text objects in the current version is bug-ridden. I've corrected it and it will be in svn in a short time. Also, you could have noticed text object related commands (namely, da, di, ca, ci) can't be repeated with a dot, and count is not taken into account (2daw only deletes one word, for example). This will be over by tomorrow, and you will have well integrated text object commands :) Stay tuned. Alessandro

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[implementations-list] Avoiding getting bug reports by email (was: Vimpulse breaks inferior shells)
by Jason Spiro 24 Jun '09

24 Jun '09

On Wed, Jun 24, 2009 at 9:43 AM, Alessandro Piras <laynor(a)gmail.com> wrote: > Also, please report the bugs on the mailing list, not directly to me, thanks > ! > Alessandro If you want to avoid getting bug reports by private mail, one thing to try is to make sure your email address doesn't appear anywhere in the first fifty lines or so of vimpulse.el, and to put in the list email address (best obfuscated like implementations-list at lists.ourproject.org) and website instead :-) Cheers, Jason

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[implementations-list] Re: Vimpulse breaks inferior shells
by Alessandro Piras 24 Jun '09

24 Jun '09

Also, please report the bugs on the mailing list, not directly to me, thanks ! Alessandro 2009/6/24 Alessandro Piras <laynor(a)gmail.com> > Hi menno, and thanks for your report. > The problem resides in the RET binding, I didn't know it could cause > problems. > Search for the line > (define-key viper-insert-global-user-map (kbd "RET") > 'vimpulse-enter-indents) > and comment it, your problem will be gone, but you will lose automatic > indenting when pressing enter. > I will try to find a solution :) > Cheers, > Alessandro > > > 2009/6/24 Menno <menno(a)freshfoo.com> > > Hi, >> >> Firstly, thanks for maintaining Vimpulse. It is part of the reason I made >> the switch from Vim to Emacs. >> >> I've been using Vimpulse 0.2.6.3 for a while and yesterday tried out >> 0.2.6.8 (and 0.2.6.9 today). With the new versions, inferior shells (eg. >> shell or sql-postgres) have stopped working. I get a prompt, can enter a >> command but I never see output. >> >> The problem is definitely related to Vimpulse. If I revert to the older >> version the problem goes away. >> >> Any ideas? >> >> Thanks, >> Menno >> > >

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[implementations-list] Making sure undo works properly (was: About bugs)
by Jason Spiro 23 Jun '09

23 Jun '09

On Tue, Jun 23, 2009 at 1:52 AM, Alessandro Piras <laynor(a)gmail.com> wrote: > Dear users and contributors, > I had the feeling these days that undos don't work properly. I was almost > sure it sucked big time on certain occasions, but in this last hour I was > trying to reproduce the bad behavior and everything worked properly. > If you find undo behaving in a non-natural way, please report it here on the > mailing list, with proper instructions to reproduce the bad behavior. > Thank you, > Alessandro. Will do. By the way, know that you can M-x view-lossage to print the last 100 keystrokes. Or, if you want to record all your input into a file, M-x open-dribble-file. Both keep track all types of keystrokes, including special keys and key combinations.

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[implementations-list] About bugs
by Alessandro Piras 23 Jun '09

23 Jun '09

Dear users and contributors, I had the feeling these days that undos don't work properly. I was almost sure it sucked big time on certain occasions, but in this last hour I was trying to reproduce the bad behavior and everything worked properly. If you find undo behaving in a non-natural way, please report it here on the mailing list, with proper instructions to reproduce the bad behavior. Thank you, Alessandro.

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