From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Kitchin Subject: Re: access a let* value whe ndefining a function? Date: Tue, 23 Oct 2018 16:34:45 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:39071) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gF3OK-0007DN-AO for emacs-orgmode@gnu.org; Tue, 23 Oct 2018 16:35:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gF3OG-0003ii-3a for emacs-orgmode@gnu.org; Tue, 23 Oct 2018 16:35:04 -0400 Received: from mail-ed1-x52e.google.com ([2a00:1450:4864:20::52e]:44930) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gF3O9-0003Yc-1h for emacs-orgmode@gnu.org; Tue, 23 Oct 2018 16:34:56 -0400 Received: by mail-ed1-x52e.google.com with SMTP id z21-v6so2910713edb.11 for ; Tue, 23 Oct 2018 13:34:50 -0700 (PDT) In-reply-to: List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Sender: "Emacs-orgmode" To: Matt Price Cc: Org Mode Matt Price writes: > On Tue, Oct 23, 2018 at 2:32 PM John Kitchin > wrote: > >> I think that what you really want to do here is modify org-mime-compose so >> that you can use the send-actions argument to message-mail. In >> scimax-email.el I use that to be able to turn an org-heading into an email, >> send it, and then jump back to the heading to insert some information about >> the email into the heading properties after it is sent. A lot of the >> information gets passed via global variables. Maybe there is a better way >> to do that, I wrote that code a long time ago. >> >> > I'm trying to use mu4e~compose-mail instead of message-compose, I guess > mostly because I want to be able to use the mu4e email address completion > features in the `To:` header. And it wouldalso be nice to save the email > to the appropriate mu folder. But I didn't seem to be able to make mu4e > bounce back to my buffer no matter what I do, and though mu4e~compose-mail > accepts a return-action argument it doesn't actually use it :-(. This is kind of tricky. Here is an approach that seems to work: (defun my-compose () (interactive) (mu4e~compose-mail) (advice-add 'mu4e~switch-back-to-mu4e-buffer :after `(lambda () (switch-to-buffer (get-buffer ,(buffer-name) )) (advice-remove 'mu4e~switch-back-to-mu4e-buffer "om-temp-advice")) '((name . "om-temp-advice")))) You just call M-x my-compose to get this behavior. I guess you could advise mu4e~compose too to add the advice. It seems necessary to use a temporary advice here. I wasn't aware of the name way of removing advice, that is pretty nice here, since we use a changing anonymous function. > > >> Otherwise, you need to figure out how to use something like a macro that >> captures the current-buffer and creates a lambda function with that >> information in it, and attaches it to the message-buffer hook somehow. For >> example this will display a message-box for me after the message is sent. >> >> (let ((f `(lambda () >> (message-box "Came from %s" ,(current-buffer))))) >> (message-mail) >> (add-hook 'kill-buffer-hook f nil t)) >> >> Some important notes is this hook is added in local mode, so it only >> affects that email buffer. >> >> > Can you explain to me what yo umean by "added in local mode" -- how is that > achieved? This is what the final t argument in the add-hood function does. I think it makes the hook local to the buffer it runs in, as opposed to in every buffer. > > Meanwhile, htis is what I've done and it seems to work: > > (eval (car (read-from-string > (concat > "(advice-add 'mu4e~switch-back-to-mu4e-buffer :after > (lambda () > (switch-to-buffer > (get-buffer \"" > (buffer-name) > "\" )) > (advice-remove > 'mu4e~switch-back-to-mu4e-buffer \"om-temp-advice\")) > '((name . \"om-temp-advice\")))")))) This is practically the same as my `, solution above, you just use strings to protect some parts of code from evaluation, regular function calls in places, and then you concat it all together and read it. The `, syntax is optional, but without it you have to use list and quotes to build up the code in a similar way: (let ((f (list 'lambda () (list 'message-box "Came from %s" (current-buffer))))) (message-mail) (add-hook 'kill-buffer-hook f nil t)) here the ' means treat something like a symbol, and don't evaluate it. We build up the lambda expression using runtime information, e.g. what is the current-buffer when the code is run. > > seems a little baroque. Maybe what you have there is way better. I don't > really undertand backquotes and leading ocmmas even now. It takes some practice. Suppose you have some variables defined, e.g. a=3, then here are two ways to make a list where you put the value of a into the first place, and a symbol b in the second place. (list a 'b) => '(3 'b) `(,a b) => '(3 'b) This lets you build up expressions, including functions that are defined at runtime. Lots of macros use this syntax to build up expressions that are later evaluated. > > > > >> John >> >> ----------------------------------- >> Professor John Kitchin >> Doherty Hall A207F >> Department of Chemical Engineering >> Carnegie Mellon University >> Pittsburgh, PA 15213 >> 412-268-7803 >> @johnkitchin >> http://kitchingroup.cheme.cmu.edu >> >> >> >> On Tue, Oct 23, 2018 at 1:40 PM Matt Price wrote: >> >>> Hey, I guess this is OT. >>> >>> I'm trying to advice org-mime-org-buffer-htmlize so that it returns to >>> the org buffer when its done. I want to do something like this: >>> >>> (let ((thisbuffer (current-buffer)) >>> (advice-add >>> 'mu4e-sent-handler >>> :after (lambda (docid props) >>> (switch-to-buffer thisbuffer) >>> (advice-remove 'mu4e-sent-handler 'om-sent-advice) >>> ) '((name . 'om-sent-advice))) >>> >>> but by the time the hook is run, the (let) has long since lapsed, and >>> thisbuffer is no longer defined. Can I force evaluation of the variable >>> during definition? >>> >>> Thanks, >>> m >>> >> -- Professor John Kitchin Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 @johnkitchin http://kitchingroup.cheme.cmu.edu