Questions tagged [buffer-local]

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setq versus setq-local for tab-always-indent

Have found the tab-always-indent setting and wonder the appropriateness of (setq tab-always-indent 'complete) versus (setq-local tab-always-indent 'complete)
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  • 357
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37 views

How can I change buffer local key binding C-h, C-x, M-x in term raw mode?

I'm running a specific console application in a term window (char/raw mode). This application has no need for C-h, C-x, and M-x, so they should just do what they always do in Emacs. However, I don't ...
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  • 21
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1 answer
29 views

How to provide my own ediff-make-wide-display-function for ediff

For Ediff's wide display feature I like to use my own ediff-make-wide-display function. Ediff has a variable for this: ediff-make-wide-display-function. However when I write: (defun my-ediff-make-wide-...
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  • 1,081
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1 answer
66 views

How to know (in Elisp) what buffer was current when a command is invoked?

I want to give an arbitrary command some buffer-local behavior without advising it. (I can do it by advising, but I want to also be able to do it without advising.) E.g., just looking at some ...
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2 votes
1 answer
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Cannot get a symbol's value for the first time when using `setq-default`

I can use setq-default to set a symbol's default value, as follows: (with-temp-buffer (make-local-variable 'bar) (setq-default bar "xyz") (symbol-value 'bar)) When I first executed ...
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  • 439
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2 answers
200 views

Defining minor-mode buffer-local variables

I want to do something VERY simple. I want to create a minor mode, which when enabled sets a buffer-local variable (say left-margin-width, for instance) with a specific value. I can do this: (define-...
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  • 93
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Why won't emacs permanently save my buffer-local var?

For many files I have file-local variables which asked me once if they were safe and I could add them permanently to my "trusted" list, never to be asked again. However, I get asked every ...
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1 vote
1 answer
204 views

setq in init file not overriding the default for indent-tabs-mode

It works when using setq-default in place of setq or when customizing through C-h v. C-h v reports that it is set in 'C source code'. I was thinking it might be affected by my c-default-style, but my ...
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60 views

Highlight matching parenthesis, only in Lisp mode (and maybe a few similar modes)

is there a way to have the global minor mode show-paren-mode functionality as a buffer-local minor mode? I love its behavior but only for Lisp. Searching for a package I can see a number of close ...
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2 votes
1 answer
261 views

How can I get the effect of buffer-local symbol plist property values?

Does Emacs have a way to set buffer-local properties on symbols? It's well-known that there are buffer-local variables. But a property belongs to a symbol, not to a variable. Hence, if I have ...
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  • 357
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2 answers
64 views

Make/unmake a variable globally buffer-local depending on another variable

I have a package with the variable my-package--my-var that needs to be buffer-local when my-package-buffer-only is t but global if my-package-buffer-only is nil. This is what I have so far: (...
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  • 105
1 vote
1 answer
246 views

org-mode in-buffer todo setting not working as expected

I am using org-mode TODO tracking change (in-buffer settings) and I'm having some issues. All the info is taken from the official docs (https://orgmode.org/manual/Tracking-TODO-state-changes.html) I ...
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1 vote
3 answers
310 views

Buffer-local input history for read-from-minibuffer

I've been trying to create a command that, when run, calls another function (my-function) which reads from the minibuffer and does some processing on the input. I want the command history for this ...
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  • 157
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1 answer
118 views

Is it possible to make a function local to the buffer?

I want to override the function helm-swoop-pre-input-optimize in man mode using its hook, but not anywhere else. Is there something similar to make-local-variable for functions?
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  • 620
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1 answer
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How do I clear a global variable that also is buffer-local?

I called add-hook multiple times because I had a few typos in the hook function, and now there are a bunch of broken copies of it in the hook. I want to do (setq after-save-hook nil), but after doing ...
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1 vote
3 answers
2k views

How can I change external program to open org URLs for one org file only

In my Emacs config, I have set Firefox to be the browser to open URLs with, (setq browse-url-browser-function 'browse-url-firefox) Now, I have one org-mode file, in which I would like to open URLs ...
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1 vote
0 answers
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Buffer-local exec-path?

Is there a way to make buffer-local overrides to exec-path (whose value is normally initialized with the PATH environment variable)? I tried (make-variable-buffer-local 'exec-path) and local ...
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  • 357
1 vote
1 answer
283 views

Have shell inherit buffer local process-environment

I have made buffer local changes to `process-environment' using the technique described in How can I get buffer-local environment variables via .dir-locals. I then call shell from that buffer. If I ...
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  • 159
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2 answers
2k views

Buffer-local after-save-hook?

I'd like to register an after-save-hook that is only active in certain buffers that I specify. For example, assume there are 3 functions currently registered in my after-save-hook: hook-01, hook-02, ...
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  • 522
3 votes
1 answer
674 views

buffer-local advice

I am trying to create a buffer local advice to run some code when a minor mode is disabled. I looked through the documentation for add-function and saw this If PLACE is a symbol, its `default-value' ...
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6 votes
1 answer
1k views

How can I get buffer-local environment variables via .dir-locals?

I'm using emacs for many different projects. For some of them, I need, for example, different entries in $PATH, or different $MAKEFLAGS, whatever, you name it... I thought this would be possible ...
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  • 461
5 votes
2 answers
821 views

Set buffer-local variable in buffer other than the current one?

I'm in buffer A and I want to set a buffer-local variable in buffer B. I'm currently doing: (with-current-buffer B (setq-local some-var 'some-val)) but is there a way to do this without changing ...
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7 votes
2 answers
827 views

The default value of buffer-local variable not set until first `setq`

Say I define a buffer-local variable foo, and its default value is "a": (defvar foo "a") (make-variable-buffer-local 'foo) (default-value 'foo) ;; => "a" Immediately after this I run the ...
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1 answer
174 views

Adding to kill-buffer-hook results in "setq: Wrong type argument"

Subtract a buffer's (the file's) size from a variable before killing it. Emacs 26. (defvar cumulative-open-bytes '0 ) (defun buffer-settings-calc-bytes () (interactive) (let ((current-open-file-...
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  • 3
2 votes
1 answer
508 views

Making a variable window-local

I am developing a feature to adapt a mode-line to the width of the window. I have developped it so far using buffer-local variables to store the state of the mode-line, however, when I open the same ...
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  • 203
2 votes
0 answers
25 views

How to preserve buffer local variables through `recompile`?

In a compilation buffer, when I set buffer local variable like so: (setq-local foo 'bar) Doing a (recompile) will unset this variable. Is there a way to keep the buffer local value permanent ...
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  • 143
2 votes
1 answer
183 views

Why isn't face-remapping-alist permanent-local by default?

text-scale-mode uses a buffer-local face-remapping-alist to scale the buffer's text, adding values like (:height 1.2). It stores a "cookie" with the scaling it has applied in another local variable, ...
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  • 1,828
-1 votes
1 answer
276 views

Set a buffer/file local variable in elisp like a file local variable

I'm looking for a way to set a variable that isn't buffer local in such a way that it will act like one. It's possible to do it with file local variables, but I haven't found a way to set a variable ...
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0 votes
1 answer
194 views

Setting hl-line-mode for programming modes

In my init file I have this: (add-hook 'prog-mode-hook (lambda () (linum-mode 1))) So it shows line numbers only for programming modes. I tried to do the same with hl-line-mode, but it does not work:...
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4 votes
2 answers
2k views

How to customize major mode initialization with local variables?

Seems like most major modes clear all local variables before initializing. It also seems like many major modes read variables while initializing to customize their behavior. If I want to set a file ...
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  • 141
1 vote
2 answers
520 views

How to get an insert-text-button 'action property accessing a dynamically-bound buffer-local variable

In realgud I have a text button that needs access to a dynamically-bound buffer-local variable. The situation occurs like this. Inside one buffer that has the buffer local variable, there is a ...
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  • 858
1 vote
0 answers
486 views

Can I override global-hl-line-mode in a buffer/window?

I have the following line turning hl-line-mode on globally in my init file: (global-hl-line-mode) Most of the time, that's how I like it. But sometimes I want to turn it off. I'd hoped that I could ...
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21 votes
1 answer
5k views

What does `setq-local` do, and when should I use it?

I'm not quite clear on all the variations of buffer-local variables, even after reading all the doc and a bunch of postings here on SX. Here's a summary of my understandings: (defvar foo ..) ...
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  • 1,218
15 votes
1 answer
2k views

Mark a local variable safe for any value

The variable safe-local-variable-values can store name/value pairs that are safe as file-local or directory-local. However sometimes I want to say any value is valid for a given variable. The manual ...
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  • 303
1 vote
1 answer
87 views

Is it possible to associate minor modes with windows rather than buffers?

Does Emacs have some notion of associating minor modes with windows rather than setting them as "global" or "buffer-local"? For example, in a certain window layout I may wish to have a minor mode ...
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  • 6,864
2 votes
1 answer
194 views

Buffer-local hook shadowing default value for subsequently loaded libraries

After having a problem with debugging a package I write, I finally tracked down the problem to the following: auto-revert-mode is making kill-buffer-hook buffer-local (which is fine by me). The ...
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3 votes
1 answer
2k views

Use `.dir-locals.el' to append to `before-save-hook' as a buffer local variable

I want to use .dir-locals.el to append to the before-save-hook in a project for c++ files. Currently I'm using: (add-hook 'c++-mode-hook (lambda () (add-hook 'before-save-hook '...
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  • 785
1 vote
1 answer
71 views

How do buffer local bindings go into effect?

I'm learning to program with buffer local variables. The emacs documentation describes buffer local variables as: A buffer-local variable has a buffer-local binding associated with a particular ...
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  • 903
6 votes
2 answers
2k views

How do you disable the buffer end/beginning warnings in the minibuffer?

I see that I can do something like this: (defun limit-warnings () (set (make-local-variable 'warning-minimum-level) 'fatal)) (add-hook 'minibuffer-setup-hook 'disable-warnings) (Sorry for syntax ...
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4 votes
1 answer
628 views

How to find out if variable is buffer-local?

I'm trying to get rid of tabs, following this guide: (setq-default indent-tabs-mode nil) So: why setq-default and not setq? I know I would need to use setq-default for a buffer-local variable, but I ...
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  • 903
11 votes
2 answers
1k views

How to Persist Evil Markers?

I want to be able to save my buffer local evil markers (m to mark a location and then ' or ` to jump to it) across emacs sessions/instances. I'm not really sure how to do this. I tried installing/...
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  • 409
4 votes
1 answer
534 views

org-mode: have flycheck resolve relative config while editing code blocks

Desired behaviour While editing code blocks with org-mode by pressing C-c ' I'd like Flycheck to resolve relevant configuration the same way it does for normal files. I'm using JavaScript, and these ...
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3 votes
1 answer
605 views

whitespace-mode ignores whitespace-line-column

In ~/.emacs I've globally enabled whitespace-mode: (require 'whitespace) (setq whitespace-style '(face empty tabs lines-tail trailing)) (global-whitespace-mode t) Example buffer content: -*- fill-...
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  • 989
5 votes
1 answer
1k views

How to get an value from a buffer local variable

I have the following code in the file1.el: (with-current-buffer (get-buffer-create "TestBuffer") (read-only-mode -1) (erase-buffer) (make-local-variable 'source) (setq source (get-source-...
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6 votes
2 answers
3k views

How to modify-face for a specific buffer?

I work with a lot of tabular data files and use stripe-buffer.el make them easier to read. But I also work with more than one, so I'd like to make it easier to distinguish among them as well and want ...
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  • 3,475
5 votes
1 answer
1k views

What is the difference between setq-mode-local and setq-local

I don't understand how setq-mode-local works (mode-local is a package from cedet). The macro's documentation says: setq-mode-local is a Lisp macro in `mode-local.el'. (setq-mode-local MODE &...
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14 votes
1 answer
945 views

Make a buffer-local variable become global again

I was experimenting with local variables and set: (defvar-local foo nil "Buffer local foo") I later redesigned my program to use a global variable instead using: (defvar foo nil "Not buffer local ...
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