How do I control emacs from a terminal? - emacs

I'm trying to drive emacs on OSX using Dragon Naturally Speaking running inside a Windows VM. Rather than running emacs in the VM, I'd like to drive an emacs (built from the HEAD of the repository) already running on the mac side of things. So, after a hunt through the emacs lisp manual I came up with the following snippets of lisp (currently running from the scratch buffer while I work stuff out):
;; This part is run from an emacsclient -t session
(defvar slave-frame last-event-frame)
;; and this is run in a GUI frame
(defadvice handle-switch-frame (after update-slave-redirect-advice activate)
(unless (eq last-event-frame slave-frame)
(redirect-frame-focus slave-frame last-event-frame)))
And all is well. I type into the terminal window, displaying buffer A and my typing appears in the GUI frame busily dsplaying buffer B. Great. Until I do C-x C-f or any other command that needs the minibuffer, at which point I get the error Terminal 1 is locked, cannot read from it.
I'm I barking up the wrong tree here, or is there a way to make redirect-frame-focus work nicely with commands that use the minibuffer?

Piers,
What behavior do you want, redirection to a minibuffer on the (Windows) client or a minibuffer on the server? Also, what version/flavor of emacs are you using?

Related

How do I exit Emacs from the terminal?

I just installed Emacs 26.3 on Ubuntu 20.04. I opened a buffer in the terminal, and I cannot close it. C-x C-c does nothing. f10 to activate the menu does not activate the menu.
I'm using a .emacs file that maps cut/copy/paste commands to the normal C-x/C-c/C-v. I don't think that this can affect the issue, however, because I have the exact same setup (including the same .emacs file) on by Emacs 24.5/Ubuntu 16.04 laptop, and it has no problem exiting with C-x C-c. Also, I had the exact same problem before I installed the .emacs file on the new system.
How do I kill Emacs?
This question exists, but it has no useful answers.
ESC x save-buffers-kill-terminal
OFC binding C-x will affect C-x C-c. You don't need to know anything about Emacs to realize the problem. Just think twice.

How to configure simpleclip in emacs terminal mode to copy-paste interchangeably with OS?

I'm using emacs -nw (Emacs 24.5, Ubuntu 16.04). And I found that the default emacs M-w C-y keys don't work interchangeably with the operating system.
After some research, it seems that the most comprehensive solution is to use simpleclip. EmacsWiki says that
simpleclip
You can use https://github.com/rolandwalker/simpleclip which ALWAYS
works.
But looking into its usage guide above, simpleclip makes use of a set of keys that are completely different from the default M-w C-y or the OS Ctrl-Shift-c, Ctrl-Shift-v for copy-paste
;; Press super-c to copy without affecting the kill ring.
;; Press super-x or super-v to cut or paste.
I don't really want to use super key a lot with my PC keyboards, and don't want to remember (or persuade others to remember) yet another set of copy-paste keys.
For the GUI emacs, I can copy something in emacs and paste it into another terminal without any configuration. Mostly, I don't feel that Emacs is any different from gedit except that the emacs copy-paste keys M-w C-y can be used in addition.
In the terminal mode, most of it breaks down. If I use OS copy (Ctrl-Shift-c), one line in emacs can be copied into two or more lines in a target terminal because the line is too long. contents copied using M-w simply do not paste into other programs, even though I tried to set certain variables following other SO questions, e.g.:
(setq x-select-enable-clipboard t)
I'm not very familiar with elisp. My question:
How can I customize or configure simpleclip so that copy-paste in emacs -nw is exactly the same as copy-paste in the OS?
Other related SO questions:
How to copy text from Emacs to another application on Linux
emacs terminal mode: how to copy and paste efficiently
I recommend you use the xclip package, which you can install from GNU ELPA (i.e. via M-x package-list-packages). It requires installation of the xclip utility under X11 (e.g. via aptitude install xclip) and uses the pbcopy/pbpaste under macOS.

Emacs24 , org-mode, can't find `latex'(needed to convert LaTeX fragments fo images)

I want to use the command C-c C-x C-l to preview latex code in org-mode. Since the emacs-nox cannot do this, I tried apt-get install emacs24. However, after I have installed the emacs24 with GUI, I get an error like
can't find \`latex'(needed to convert LaTeX fragments to images)
I have installed texlive2016, and I can latex *.tex in shell command.
I added the /paht/to/latex to .emacs, but it don't work well.
Adding the following to my init.el makes it work:
;; Making emacs find latex (so that C-c C-x C-l works on orgmode)
(setenv "PATH" (concat ":/Library/TeX/texbin/" (getenv "PATH")))
(add-to-list 'exec-path "/Library/TeX/texbin/")
It is not a very pretty solution, but it does the job and is very easy to modify and understand.
This solution worked on a Mac running macOS Sierra and Emacs v25.1.
My crystal ball tells me that the problem is that you're not starting the GUI Emacs from a terminal, so it can't inherit your $PATH settings. See for example https://emacs.stackexchange.com/questions/10722/ (that question is within OSX, but the same problem appears in other systems).
Apparently you can set env-vars globally (so that they affect all applications, including those started directly from the GUI) in ~/.pam_environment (that's for GNU/Linux systems). Note that this is only consulted when you login, so you need to logout+login for changes to take effect.

REPL for Emacs Lisp

What are some REPLs for Emacs Lisp?
Is there only one that is within Emacs?
Are there some that run inside terminal outside Emacs?
Based on this question: REPL on console emacs, you can use M-x ielm (inferior emacs lisp mode).
There is a (work in progress) REPL for Emacs for use from the command line. It currently supports basic command line editing and history.
The code is hosted on Github.
There is this project on Gitlab. The REPL can run on a termninal or on Emacs' minibuffer. Even if you run it in "no-window-system" mode (with -nw).

How can i paste the selected region outside of emacs?

I am using Mac OS and emacs -nw (the terminal mode).
I don't know how can I paste things (having been implemented by M-w in emacs -nw) outside the emacs.
I know that the emacs -ns can do it.
Searching the internet and the command C-h b, i find out that method, but it didn't work out.
(setq x-select-enable-clipboard t)
(setq interprogram-cut-function 'x-select-text)
I don't know much about the argument of interprogram-cut-function.
Where does the x-select-text come from and what does it mean?
If you are using Ubuntu 12.04 or Fedora 21, there are a couple of options to make this work.
First you need to install xclip
sudo apt-get install xclip
First Option: For Emacs 24
If you are using emacs24 you can install from the list of packages
M-x package-list-packages
Select
xclip //mine was version 1.3
In your .emacs add:
(xclip-mode 1)
Second Option. For emacs before version 24
Install xclip.el:
Integrating Emacs with the X11 Clipboard in Linux
Third Option. Using #Nicholas Riley code shown in the answer
To use the code in the answer you need
pbcopy / pbpaste in Ubuntu (command line clipboard)
x-select-text is only used if you're running Emacs in a GUI. (Emacs maps the Mac/Windows pasteboard/clipboard APIs to the X11 model, hence the name). You can always use C-h f to find out more about a function like this one and view its definition if it's written in elisp.
On the Mac, there is no concept of CLIPBOARD versus PRIMARY selections, so there is no point in setting x-select-enable-clipboard.
The whole point of running emacs -nw is that it doesn't interact with the windowing system. Why use Emacs in a terminal when there are plenty of graphical Emacsen that work very nicely on the Mac?
That said, if you really wanted to hook up terminal Emacs to the Mac pasteboard, you could do something like this:
(setq interprogram-cut-function
(lambda (text &optional push)
(let* ((process-connection-type nil)
(pbproxy (start-process "pbcopy" "pbcopy" "/usr/bin/pbcopy")))
(process-send-string pbproxy text)
(process-send-eof pbproxy))))
If you want a way to place the contents of the emacs region onto the clipboard only sometimes, as opposed to every time you do an emacs yank (which causes the clipboard contents the be overwitten all the time), you should check this answer to a related question:
https://stackoverflow.com/a/19625063/3363328
I found that it solved my problem much better than setting xclip mode.