I'm using emacs-snapshot (24.2.50) on Xubuntu 12.10. For completion I am currently using auto-complete (v1.4).
I have a pretty nice setup of auto-complete with various sources, including the semantic source for code completion of my c++ programming. However, I'd like to switch to predictive-mode for completion of LaTeX documents (I'm using AUCTeX for all LaTeX related stuff).
My current auto-complete config (for LaTeX; I omitted all non-LaTeX config) looks like this:
(require 'auto-complete-latex)
(require 'ac-math)
(add-to-list 'ac-modes 'latex-mode) ; make auto-complete aware of {{{latex-mode}}}
(defun ac-latex-mode-setup () ; add ac-sources to default ac-sources
(setq ac-sources
(append '(ac-source-math-latex ac-source-latex-commands)
ac-sources))
)
(add-hook 'LaTeX-mode-hook 'ac-latex-mode-setup)
After adding predictive to the load-path and doing the auto-load stuff as described here I tried to disable auto-complete for LaTeX-mode and enable predictive-mode in turn by exchanging the above code by this:
(defun ele/latex-mode-completion-setup ()
(auto-complete-mode -1)
(predictive-mode 1)
)
(add-hook 'LaTeX-mode-hook 'ele/latex-mode-completion-setup)
Unfortunately this doesn't work as expected: auto-complete is actually disabled but predictive-mode is not enabled and instead of using AUCTeX the build-in tex-mode is used.
I have uploaded all LaTeX related config here. Note that this is loaded after the above completion setup, but this is the case for the old auto-complete based setup as well. Also note that exchanging that order does not make a difference as far as I can tell. Furthermore I found that simply commenting the auto-complete config (first snippet I posted) results in the same behaviour: tex-mode is used instead of AUCTeX.
I don't want to switch to predictive-mode for all modes but I really like many features it provides when doing LaTeX editing.
Any suggestions?
(remove-hook
might clear the hook, not to run unwanted stuff - just a suggestion indeed
Related
So when editing Django templates I have noticed that web-mode will auto-complete certain tags. This is awesome, except that this functionality seems to conflict with autopair-mode by placing an extra close bracket like so:
{% block title %}} <--- '%}' closing brace is added by web-mode, second '}' is added by autopair-mode
For simplicity's sake I decided to enable autopair-mode globally in my .emacs like so:
(require 'autopair)
(autopair-global-mode) ;; to enable in all buffers.
Realizing the conflict I added the following web-mode-hook to (in theory) disable autopair-mode when entering web-mode:
(add-hook 'web-mode-hook
#'(lamda () (autopair-mode -1)))
I am using emacs24 and this should work according to the simple documentation on autopair-mode's git repo...but I am noticing that autopair-mode is still being enabled by default when entering web-mode.
I am thinking there is some sort of inheritance in elisp that I don't know about...so I thought I would ask the question here.
For reference, the exact order/snippet from my .emacs is as follows:
(require 'autopair)
(autopair-global-mode) ;; to enable in all buffers.
(add-hook 'web-mode-hook
#'(lamda () (autopair-mode -1)))
I am configuring AUCTeX in emacs.
Most of the configurations are put in a LaTeX-mode-hook. When I open a main.tex file, I notice that the major mode is latex-mode and my hooked configurations are not activated. I have to M-x Tex-latex-mode to activate them. But the major-mode is still latex-mode.
(add-hook 'LaTeX-mode-hook
(lambda ()
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; auctex
(setq TeX-auto-save t)
(setq TeX-parse-self t)
))
So I would like to know what is the difference of these modes and how can I turn on AUCTeX automatically when I open a *.tex file.
The modes provided by AUCTeX are listed at https://www.gnu.org/software/auctex/manual/auctex.html#Modes-and-Hooks and they are
plain-TeX-mode
LaTeX-mode
ams-TeX-mode
ConTeXt-mode
Texinfo-mode
docTeX-mode
Instead,
tex-mode
plain-tex-mode
latex-mode
slitex-mode
doctex-mode
(note the different capitalization) are the major modes provided by the TeX mode package shipped with Emacs.
If you want to open all *.tex files with AUCTeX LaTeX mode add this to your .emacs:
(add-to-list 'auto-mode-alist '("\\.tex$" . LaTeX-mode))
Actually, this shouldn't be necessary, because AUCTeX defines the tex-mode.el mode names as alias of its own modes.
TLDR: Use latex-mode or LaTeX-mode (they mean the same thing), no need to change auto-mode-alist, and use LaTeX-mode-hook for hooking into AucTeX.
Setting up AucTeX can be quite confusing, because it uses advice to override Emacs' built-in support for TeX and friends.
So, after installing AucTeX from ELPA, you should see the following in C-h f latex-mode:
This function has :override advice: ‘TeX-latex-mode’.
Same for all the other tex modes, though the list of modes that AucTeX overrides depends on the value of the TeX-modes variable.
The function LaTeX-mode is not defined in AucTeX (any more?): it's defined in core Emacs, with a cryptic comment about compatibility:
;; The following three autoloaded aliases appear to conflict with
;; AUCTeX. However, even though AUCTeX uses the mixed case variants
;; for all mode relevant variables and hooks, the invocation function
;; and setting of `major-mode' themselves need to be lowercase for
;; AUCTeX to provide a fully functional user-level replacement. So
;; these aliases should remain as they are, in particular since AUCTeX
;; users are likely to use them.
;; Note from Stef: I don't understand the above explanation, the only
;; justification I can find to keep those confusing aliases is for those
;; users who may have files annotated with -*- LaTeX -*- (e.g. because they
;; received them from someone using AUCTeX).
;;;###autoload
(defalias 'TeX-mode #'tex-mode)
;;;###autoload
(defalias 'plain-TeX-mode #'plain-tex-mode)
;;;###autoload
(defalias 'LaTeX-mode #'latex-mode)
What this all means is that, at least in 2021, you do not need to change auto-mode-alist to use AucTeX; just installing it is enough for it to override Emacs' builtin functionality.
Unfortunately, there's one last source of confusion. Even though LaTeX-mode is now mostly just a useless alias for latex-mode, it turns out that code in AucTeX that overrides latex-mode does not call latex-mode-hook (it calls LaTeX-mode-hook, which is different. So the LaTeX- variables, which are the AucTeX ones (as opposed to the lowercase ones that are builtin with Emacs), are still useful.
I am using vala-mode to edit Vala code in Emacs. However, I want to change two things in vala-mode:
I want to indent with 4 spaces instead of 2 spaces (which is my Emacs default).
I want to enable auto-completion inside vala-mode.
Auto-completion works in all modes except for vala-mode, and I want the 4 spaces indentation only for vala-mode, not all modes. However, I don't know how to make these changes only for vala-mode.
Thank you.
Something like this should work:
(add-hook 'vala-mode-hook (lambda () (setq c-basic-offset 4)))
I have never used vala-mode, but it looks like it is based on cc-mode so that setting c-basic-offset might work. For info on how to set c-basic-offset in a style, see the documentation at
(info "(ccmode)Customizing Indentation")
I saw that the indentation issue was fixed but not the auto complete feature. If you are using the auto complete package, then in your init.el or .emacs you can simply put:
(require 'auto-complete-config)
(add-to-list 'ac-modes 'vala-mode)
You will then have auto complete locally. Thats one way of doing it. Also there is a Yasnippet package for vala that is available in MELPA (https://github.com/gopar/vala-snippets)
I load auto-complete mode like this:
(let ((ac-path "path/to/auto-complete"))
(add-to-list 'load-path ac-path)
(require 'auto-complete-config)
(add-to-list 'ac-dictionary-directories (concat ac-path "ac-dict"))
(ac-config-default))
It works fine with C major mode, but doesn't turn on automatically when I open ObjC files. I can still turn it on manually and it will work fine along with the ObjC major mode.
Here's a snippet from the docs regarding ObjC major mode:
The hook `c-mode-common-hook' is run with no args
at mode initialization, then `objc-mode-hook'.
If I understand correctly, auto-complete adds a hook to the c-mode-common-hook, but objc-mode-hook somehow overrides it. Is there a way to fix this?
Thanks.
While looking through the source code of auto-complete.el, I've stumbled upon this definition
(defcustom ac-modes
'(emacs-lisp-mode
lisp-interaction-mode
c-mode cc-mode c++-mode
java-mode clojure-mode scala-mode
scheme-mode
ocaml-mode tuareg-mode
perl-mode cperl-mode python-mode ruby-mode
ecmascript-mode javascript-mode js-mode js2-mode php-mode css-mode
makefile-mode sh-mode fortran-mode f90-mode ada-mode
xml-mode sgml-mode)
"Major modes `auto-complete-mode' can run on."
:type '(repeat symbol)
:group 'auto-complete)
It turns out that auto-complete doesn't have a true global mode. It is enabled only with those major modes that are included in the ac-modes variable.
So, adding the following line to the .emacs file has solved the issue for me.
; add this line after the auto-complete mode has been loaded
(add-to-list 'ac-modes 'objc-mode)
Use the following:
(defun my-objc-mode-hook ()
(auto-complete-mode 1))
(add-hook 'objc-mode-hook 'my-objc-mode-hook)
Note 1: The function auto-complete-mode is a toggle function, when called with no arguments.
Note 2: It's possible to add an anonymous function using lambda, but this have several drawbacks. The most important ones are: modifying the function and reevaluating the expression will add the modified function in addition to the earlier version and C-h v xxx will print the full unformatted lambda function, which typically is hopeless to read and understand.
(add-hook 'objc-mode-hook 'auto-complete-mode)
That should do it if you're using auto-complete-mode. You can add more complex things to mode hooks by doing:
(add-hook 'objc-mode-hook '(lambda ()
(something-with arguments)))
Note that both arguments to add-hook are quoted, this is necessary and if you add unquoted functions they will probably not work.
I'm an Emacs user with no skills with regards to configuring the editor. After I upgraded from haskell-mode 2.4 to 2.7, I've noticed two changes:
Indentation is different somehow, in a way I don't quite like. I can't quite put my finger on what it is.
More importantly: If I have cua-mode enabled and highlight a block of text, backspace/delete does not delete the entire block, just the previous/next character from my marker.
I see that haskell-mode 2.7 uses the minor mode haskell-indentation-mode by default, while 2.4's behaviour has been preserved in the form of haskell-indent-mode. If I first turn off the former, and then on the latter, the behaviour I want is restored (i.e. indentation feels like before, and backspace/delete deletes highlighted blocks).
I can't, however, get this to happen automatically whenever I open a file with a .hs suffix. I've tried various things resembling
(remove-hook 'haskell-mode-hook 'turn-on-haskell-indentation-mode)
(add-hook 'haskell-mode-hook 'turn-on-haskell-indent-mode)
and the likes of it, but I either end up with the standard mode or with plain haskell-mode without indent and doc.
Any ideas?
Solution (thanks to nominolo):
(remove-hook 'haskell-mode-hook 'turn-on-haskell-indent)
(remove-hook 'haskell-mode-hook 'turn-on-haskell-indentation)
(add-hook 'haskell-mode-hook 'my-haskell-mode-hook)
(defun my-haskell-mode-hook ()
(haskell-indentation-mode -1) ;; turn off, just to be sure
(haskell-indent-mode 1) ;; turn on indent-mode
)
The best way to configure such things is by writing a custom hook:
(add-hook 'haskell-mode-hook 'my-haskell-mode-hook)
(defun my-haskell-mode-hook ()
(haskell-indentation-mode -1) ;; turn off, just to be sure
(haskell-indent-mode 1) ;; turn on indent-mode
;; further customisations go here. For example:
(setq locale-coding-system 'utf-8 )
(flyspell-prog-mode) ;; spell-checking in comments and strings
;; etc.
)
You could also stick an anonymous function in there, but having a named function is easier if you want to experiment with some settings. Just redefining the function (and re-opening a Haskell file) will give you the new behaviour.