Questions tagged [major-mode]

The mode that determines the editing behavior of Emacs while that buffer is current. The mode line normally shows the name of the current major mode, in parentheses.

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2answers
367 views

Enable mode if file content contains a matching string

I would like to enable rjsx-mode whenever a file I open contains a specific string, or a regex like import.*react for example. Is there a way to do something like this in emacs?
2
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0answers
85 views

Recommended use of non-file-visiting revert-buffer-function

Summary I am working on a major mode derived from special-mode, which populates its buffers with formatted lists of items retrieved from a web API. Reverting such a buffer involves refetching and ...
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0answers
585 views

Enabling Company CAPF backend with timer in Major Mode

I've be working on a new major mode for a DSL. I'm planning to use the CAPF backend for company mode and would like to provide the integration. The completion at point functions produce the correct ...
1
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0answers
87 views

Keyword as comment ender (and starter)

In my previous question I asked about complex comment-start sequence and I think I figured it out, but now I have another problem. Let say we have this mode: (defconst test-font-lock-keywords '(("\\...
1
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1answer
87 views

Complex comment-start (and end) sequence

As far as I understand there is syntax flags only for comment delimiters made up of two characters but if I have comment delimiters of length greater than two characters is it possible to change ...
0
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1answer
62 views

.emacs linked to emacs.link,open emacs.link in emacs-lisp mode

Say I have a symbolic link .emacs link to emacs.link,so when I open emacs.link,the associated buffer's major mode is Fundamental mode. I want emacs.link's major mode Emacs-Lisp. Another example is: ...
0
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1answer
167 views

Is it possible to auto select the mode depending on where the file is?

One can use auto-mode-alist to define modes based on the regex and the filename. However I want to use different modes for files depending on which folder they are in. So, for example, in a django ...
1
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2answers
256 views

Is it possible to lazy-load language mode packages?

Most of the packages I currently use are major modes for various languages that are only included in the off-chance I load a file of that type. Is there a way to postpone loading them at startup in ...
5
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0answers
361 views

How to read wikipedia in Emacs

Is there a simple mode for the reading of wikipedia through Emacs?
3
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0answers
160 views

SMIE default syntax : First level of indentation

When you only do that in your major mode : (require 'smie) (smie-setup nil #'ignore) That means SMIE but no grammar, and no rules. And it's great. It makes the point stay on col0 when you TAB and ...
2
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1answer
396 views

How do I activate my keymap in my mode?

Following the Mode Tutorial, I /almost/ finished my own mode (my-mode). Now I only have the problem, that my mode-map settings seem to be ignored: (defvar my-mode-map (let ((map (make-sparse-...
2
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2answers
213 views

Why is the . needed for adding suffixes to the 'auto-mode-alist?

In https://www.emacswiki.org/emacs/AutoModeAlist one needs to use this command in order to add .py for python-mode (add-to-list 'auto-mode-alist '("\\.py\\'" . python-mode)) Why do we need the . ...
1
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1answer
705 views

Setting the Default Major Mode?

I have a lot of files on my system without extensions (i.e., files like todo, list_of_stuff, etc). I would like these types of files to default to markdown-mode for their major mode. How to do this? ...
0
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1answer
59 views

How can a file be configured to recognized as a certain language only in that session?

I am editing a Drupal module file which doesn't use either a .php or .module extension. How can I configure emacs to recognize the file alone as a PHP file: regardless of the extension and only for ...
20
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4answers
9k views

How to edit jsx (react) files in emacs?

I've use js2-mode but it don't indent html in javascript properly. I've found this repo https://github.com/jsx/jsx-mode.el but it's not for react, it's for some other jsx. What do you use for editing ...
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0answers
29 views

wiki and twiki major modes

Is there an emacs mode for editing and typsetting wiki wiki modes? What I am looking for is something that could help me writing a properly formatted document for wikipedia.
0
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1answer
125 views

Json-Mode / Puppet-Mode unset common functions when installed with use-package

I'm facing a weird issue in my init.el. Installing packages such as json-mode or puppet-mode (from MELPA Stable) with use-package unsets common functions like forward-word or backward-kill-word. The ...
0
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1answer
109 views

How does one change a .el file to lisp-interaction mode?

I've looked at the documentation, but I can't seem to figure out how to do it.
0
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1answer
662 views

major mode with irony warning message

Below major mode is a dummy mode just derived from c-mode: ;; a simple major mode, mylang-mode (define-derived-mode mylang-mode c-mode "major mode for editing mylang language code." (message "...
1
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1answer
72 views

File mode name with -mode suffix or not?

I am not sure when I should name file x-mode.el and when x.el. Note that because of established practice mode writer should put (provide 'x) or (provide x-mode) to the end of file and end-users load ...
12
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1answer
4k views

How to disable the org-mode in a buffer

For a test purpose, I enabled the org-mode by M-x org-mode in a buffer (e.g., in scratch buffer). How to disable it? Doing again an M-x org-mode does not turn it off.
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0answers
32 views

Cperl font lock regions in here docs

I am having a problem in cperl-mode described in this question. Basically inserting a newline at the start of a line in here doc in cperl-mode is breaking the syntax highlighting. One of the answers ...
3
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1answer
119 views

Vector literal indentation

I want to write my emacs-lisp-mode modification which respects some of my preferences. In particular, I want to override indentation for vector literals. Emacs treats vector literal as quoted list ...
1
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2answers
112 views

Cperl-mode syntax highlighting breaks when inserting a newline into a here doc

in cperl-mode, here docs are colored with a font-lock-string-face. However if you used any function that inserts a newline on a blank line (e.g. M-: (insert "\n")) it will cause all code after the ...
2
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1answer
31 views

Adding XUL file syntax highlighting support?

I am new on Emacs and I am working on modifying firefox interface. XUL is implemented as an XML dialect. I just need basic syntax highlighting for XUL. I found that VIM and gedit are working out of ...
2
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1answer
500 views

Executing programs the efficient way with Spacemacs

I'm a Vim user trying to learn Spacemacs. In Vim, I execute a Scheme program by typing :mit-scheme < xxx.scm. After the program exits, I can continue editing simply by press Enter. However, doing ...
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1answer
320 views

How to disable warning in js2-mode: function does not always return a value?

Is it possible to disable warning for functions that not always return value in js2-mode?
3
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1answer
407 views

Derived mode without merging keymap

It seems that when using define-derived-mode, the new mode's keymap is merged with that of the parent mode. Is there a way to avoid this? That is, to inherit font-lock, etc. from the parent mode, but ...
4
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1answer
210 views

Package for inline editing in another major mode

I work a lot with Typescript files for Angular 2. The whole HTML structure is packaged in a quote. I would like to select that quote, and edit it in another mode (HTML/Web mode), then save it back to ...
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0answers
120 views

How to save a yasnippet placeholder's final value in an Elisp variable?

In its more recent versions, shell-script mode tailors its behavior in response to the sh-shell variable's value, which indicates the shell variant (zsh, bash, etc.) that the script is for. I've ...
13
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1answer
2k views

Disabling electric-indent-mode for one mode (latex mode) only

I don't like the way electric indent mode works in latex-mode. Everywhere else (at least everywhere I use), it's great. How can I permanently disable electric indent mode for latex mode only, but ...
0
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2answers
424 views

How replace auto-complete-mode with company-mode in all major mode using it?

How I can replace auto-complete-mode with company-mode in all major mode using it? i.e. make all modes which activating auto-complete-mode (e.g. c-mode or sh-mode etc), activate company-mode instead ...
1
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1answer
123 views

init.el config overwritten in certain modes? [duplicate]

I find when I am using emacs in certain modes that configurations made in my init.el files do not apply anymore. E.g. I have my keybinds set up so that tab is used for indentation, § for snippet ...
0
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1answer
170 views

Switching buffer to special mode or any mode?

I have written some code to create a new buffer, it starts up in fundamental mode, the buffer is to display output from commands. I am using this to create the buffer (get-buffer-create "*My Buffer*"...
0
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1answer
288 views

Create a sub-mode of an existing mode which overrides certain functions?

I want to make a few customizations to cmake-model.el. The big-picture view of this lisp file is as follows: ... ;; This function I want to modify (defun cmake-indent () ... ) ... ;; Mode ...
4
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2answers
517 views

sh-script alignment issues

I'm sure emacs used to do it my way, but things appear to have changed (probably years ago, I've just been living with the pain). I want this (to conform to corp. standards): MULTIFORM=$( curl -...
2
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1answer
66 views

Modify mode's font-locking without changing source code

Suppose I want to make additions to a major mode's syntax highlighting, how would I do this without modifying the major mode's source code? Some ideas: Redefine variable in .emacs Define a minor ...
0
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1answer
110 views

How to disable skeleton-pair-insert-maybe?

I recently got a new Chromebook and installed Ubuntu via crouton. I then installed Emacs 23 and transferred my .emacs file to the new machine. However, a few of my key rebindings have been ...
2
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3answers
944 views

How do I change the cursor face per buffer?

I have a custom emacs major-mode which I specified the background and foreground colors for. However, the default cursor color clashes with the background and you can't see it. 'set-cursor-color' ...
0
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1answer
67 views

different mode setting

I often use .c file and .txt file on the split emacs frame. I wrote a code such as the following to init.el. ;; change text-mode indent (add-hook 'text-mode-hook (lambda () (setq ...
1
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0answers
30 views

Specify fallback possibilities for file-local variables?

It is clear from the manual how to set file variables: -*- mode: modename; var: value; … -*- For example, at the top of my ~/.gitconfig file, I have # -*- mode: conf; -*- I recently discovered ...
4
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3answers
703 views

How can I create mode-local variables?

I'm looking to create a command which stores a kind of "history" for the current major-mode. I need the variable to be independent for each major mode, but consistent across all buffers in any ...
1
vote
1answer
573 views

Syntax highlighting: highlight text followed by a pattern, but not the pattern itself

I'm writing a major mode to handle syntax highlighting for a language that allows namespaces just like in C++ e.g. somewhere::out_there. I'd like to highlight the text somewhere, but leave the ...
0
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1answer
123 views

Stop automatic indentation and cursor movement while typing in major mode

I've put together a simple major mode for syntax highlighting and indentation of AQL. This is my first, and I'm open to any suggestions there, but my question is more specific: When I type two ...
2
votes
1answer
953 views

How do I force a mode on a specific file through special comments

I have a file called zshrc (not .zshrc). Emacs does not recognize that it must use sh-modeautomatically. I want to put some sort of hint for emacs to pick up and syntax highlight my file accordingly. ...
0
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0answers
224 views

font-lock problem of c++ mode

I recently notice that there's some strange behaviours of the font-lock of the c++-mode. Let's start emacs by emacs -Q in the terminal, edit a new file test.cpp and save the following contents Then ...
4
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2answers
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 ...
3
votes
1answer
324 views

Is it possible to achieve erlang formatting like this?

As I was going through learnyousomeerlang I came across code formatted like so: if X > Y -> a() ; true -> b() end Presently As close as I can get is: if X > Y -> a() ; -...
2
votes
1answer
511 views

How to prevent line wrapping in code, but allow it in help/info buffers?

I'm quite new to emacs (coming from vim), and I'm struggling to figure out how to configure sane line-wrapping/truncation behavior. For the most part, I'd like to prevent wrapping, so I put this in ...
9
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2answers
213 views

How to write a major mode that does not open the file but provides a view on it

I would like to write a major mode for inspecting netCDF files. These are binary files which can be multiple GB in size. So I don't want to open them in emacs. The interaction that I have in mind is ...