emacs组织模式文件本地键绑定

Question

I'm using org-mode in emacs together with ox-reveal. The latter defines the command org-reveal-export-to-html, which I would like to bind to a key for buffers with org files, which are presentations (so not for all org files).

So the question is: how can I define file local key bindings in org-mode?

What I currently have is this:

#+BEGIN_COMMENT
Local Variables:
eval: (local-set-key [f5] 'org-reveal-export-to-html)
End:
#+END_COMMENT

But imho this is not very elegant.

Answer 1

You can define a key only for org-mode by using org-defkey, basically add the following to your init file

(org-defkey org-mode-map [f5] 'org-reveal-export-to-html)

UPDATE

You can use file local variables.

(defvar export-with-reveal nil)

(defun export-with-reveal-or-html ()
  (interactive)
  (if (or export-with-reveal (file-exists-p "reveal.js"))
      (call-interactively 'org-reveal-export-to-html)
    (call-interactively 'org-export-as-html)))

(org-defkey org-mode-map [f5] 'export-with-reveal-or-html)

The function export-with-reveal-or-html if the variable export-with-reveal has value t or there is a file 'reveal.js' relative to org file , if so it exports with reveal or it falls back to default html export. You can specify a file to exported as reveal by adding the following to top of your org file

# -*- export-with-reveal: t -*-

UPDATE 2

You can also define arbitrary export function by doing using, file-local variables

(defvar my-export-fn nil)

(defun my-export ()
  (interactive)
  (if my-export-fn
      (call-interactively my-export-fn)
    (call-interactively 'org-export-as-html)))

(org-defkey org-mode-map [f5] 'my-export)

Then at top of the file you can set the export function you want to use eg

# -*- export-fn: org-reveal-export-to-html -*-

Answer 2

I came up with following solution, which exploits local variables hook hack and defines buffer lokal hook:

(add-hook 'org-mode-hook 'my-org-mode-hook)
(defun my-org-mode-hook ()
  (add-hook 'hack-local-variables-hook
            (lambda ()
              (local-set-key [f5] (if (boundp 'my-org-export)
                                      my-org-export
                                    'org-html-export-to-html)))))

Then in org mode I add this:

#+BEGIN_COMMENT
Local Variables:
my-org-export: org-reveal-export-to-html
End:
#+END_COMMENT

Still I would love to see something like this, without any hook hacking:

#+EXPORT: org-reveal-export-to-html