I have following setting in ~/.emacs
(defun my-fillcol-hook ()
(longlines-mode t)
(setq-default fill-column 80))
(add-hook 'c-mode-hook 'my-fillcol-hook)
(add-hook 'c++-mode-hook 'my-fillcol-hook)
(add-hook 'tuareg-mode-hook 'my-fillcol-hook)
The fill-column is set as expected in C-mode and C++-mode but not in tuareg-mode. I am not able to find out why fill-column is not getting set in tuareg-mode. Thanks in advance for the help.
setq-default changes the global value, whereas tuareg-mode apparently sets a buffer-local value which takes precedence. IOW you want to use setq-local or just setq.
Related
I have several abbrev defined that I was accessible everywhere except in latex mode. I defined
(setq-default abbrev-mode t)
(add-hook 'latex-mode-hook (lambda () (abbrev-mode -1)))
But whenever I open a latex file it still has abbrev mode enabled. What's going on?
Never worked with latex before, but for me the following works fine:
(setq auto-mode-alist (cons '("\\.lat\\'" . latex-mode) auto-mode-alist))
(setq-default abbrev-mode t)
(add-hook 'latex-mode-hook (lambda () (abbrev-mode -1)))
M-x abbrev-mode
%Abbrev mode enabled in current buffer
Please make sure the emacs recognized your file as a latex file, the first line I wrote should do the trick.
The reason was that AUCTex uses LaTeX-mode-hook. Thanks to stefan in the comment for pointing that out
Looking to set a variable under latex mode. The idea is that the value set under latex mode will override the value of the same variable set in the customise section. I am very new to emacs so these are my attempts:
(add-hook 'LaTeX-mode-hook '(setq line-move-visual t))
(add-hook 'latex-mode-hook (lambda () (setq line-move-visual t)))
Why do these not work? What should I do instead?
Clarification: looking to set the variable (setq line-move-visual t) as I have it as (setq line-move-visual nil) for all other files
If you just setq the variable in your LaTeX-mode-hook it will also have an effect on any other open buffer. It is possible to make the change only effect the current buffer:
(add-hook 'LaTeX-mode-hook
(lambda ()
(make-local-variable 'line-move-visual)
(setq line-move-visual nil)))
Also, please note that the hook for the default mode for LaTeX in Emacs is called latex-mode-hook but the hook when you are using the (far superior) AUCTeX is called LaTeX-mode-hook
EDIT: Changed make-variable-buffer-local to make-local-variable. See comments to this answer.
I've got the following in my .emacs since for most source code I use spaces only:
(add-hook 'prog-mode-hook
(lambda ()
(setq indent-tabs-mode nil)))
This messes up my makefiles though since they require tabs. How do I work around this so that I get spaces by default for all source code, but makefiles retain tabs?
You can always add an add-hook for makefile-mode to change it back.
(add-hook 'makefile-mode-hook
(lambda ()
(setq indent-tabs-mode t)))
Let me start by saying I'm very new to emacs.
I'm attempting to create customizations for major-modes. While my settings are functioning correctly, I'm observing that when I open a new buffer, that buffers major-mode customization is being applied to other buffers of a different type.
For instance, if I open a file named 'Makefile', makefile-mode is used and my customizations are applied. If I then open another file such as 'test.c', c-mode is used but customizations from makefile-mode are merged with customizations from c-mode.
The relevant portions of my .emacs file can be seen below:
(defun c-mode-settings ()
(c-set-style "bsd")
(set-buffer-file-coding-system 'utf-8-unix)
(show-paren-mode 1)
(setq c-basic-offset 4)
(setq tab-width 4)
(setq indent-tabs-mode nil)
(setq c-tab-always-indent t)
(setq require-final-newline t)
)
(defun makefile-mode-settings ()
(setq whitespace-style '(tabs spaces space-mark tab-mark face lines-tail))
(whitespace-mode t)
(show-paren-mode 1)
(setq tab-width 4)
(setq require-final-newline t)
)
(add-hook 'c-mode-hook 'c-mode-settings)
(add-hook 'makefile-mode-hook 'makefile-mode-settings)
How can I keep these mode hooks from affecting other buffers in different modes?
Thanks!
Andrew
You need to take into account, that some variables are becoming local to buffer when set, while some are global. Usually they have corresponding comment in their description (use C-h v var-name to get this description.
In some cases, you can force that any variable become local to buffer, using the
(set (make-local-variable 'var-name) var-value)
but you need to be careful with this.
I've got an emacs configuration file whatever.el :
(abbrev-mode +1)
(provide 'whatever)
and in my init.el :
(require 'whatever)
but when i start emacs, abbrev-mode isn't enabled. why ?
thank you
Quoting from http://emacswiki.org/emacs/AbbrevMode:
You can also put the following in your ~/.emacs file if you want it
always on:
(setq default-abbrev-mode t)
If you only want it on in text and derived modes, you could do
something like this:
(add-hook 'text-mode-hook (lambda () (abbrev-mode 1)))
For multiple modes, use something like the following:
(dolist (hook '(erc-mode-hook
emacs-lisp-mode-hook
text-mode-hook))
(add-hook hook (lambda () (abbrev-mode 1))))
Abbrev-mode is enabled per-buffer.
One way is to create a hook function that you could add to the major mode hooks you will want to use it in.
For example:
(defun my-enable-abbrev-mode ()
(abbrev-mode 1))
(add-hook 'c-mode-hook 'my-enable-abbrev-hook)
(add-hook 'java-mode-hook 'my-enable-abbrev-hook)
Another approach is to use change-major-mode-hook.
While others explained how to get what you presumably want, I'll just point out that w.r.t to your actual question ("Why?"), the reason is simple: abbrev-mode is a buffer-local minor-mode, so when you run (abbrev-mode +1) at startup it will just enable abbrev-mode in the buffer that happens to be current during evaluation of the ~/.emacs (typically scratch) but not in subsequent buffers.