Re: change faces interactively

[Andreas Röhler]

Am 21.01.2012 03:07, schrieb Drew Adams:
> > Sorry for my poor explanation.
> > What I want is an interactive function that turns on/off
> > face changes by command.
> >
> > Say, a buffer is in "my-mode".  The above
> > (define-generic-mode ... ) will AUTOMATICALLY apply the face
> > definitions to all characters as soon as the buffer is
> > opened (assuming the mode definition recognizes its file extension).
> > I would rather develop a function that applies the faces
> > AT WILL even after the buffer is opened IN THAT MODE.
> > For example, a buffer is in "my-mode" but none of the words
> > in that buffer is applied with any faces.
> > Now I will implement a function, (defun my-mode-face-1 ()
> > (interactive)...), then a certain set of words in that
> > buffer is bold-faced.  After that, I will implement another
> > function, (defun my-mode-face-2 () (interactive) ...), then
> > another set of the words in that buffer is italic-faced. And so on...
> >
> > If it does not make sense, please ask me again.  I appreciate it.
>
> Sorry, I don't have much time right now - perhaps someone else can help.
>
> If you just want to highlight stuff then perhaps have a look here:
> http://www.emacswiki.org/emacs/FaceMenuPlus
> http://www.emacswiki.org/emacs/HighlightLibrary


here an example from python-mode.el which sets a `py-number-face' 
depending from a `boolean py-use-number-face-p'

(when py-use-number-face-p
  (add-to-list 'python-font-lock-keywords 
'("\\([0-9]+\\([eE][+-]?[0-9]*\\)?\\|0[xX][0-9a-fA-F]+\\)" 1 
py-number-face)))

You can put such into a command, calling font-lock-fontify-buffer afterwards

HTH,


Andreas

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