GNU bug report logs - #11213
24.0.95; (Maybe/Wish): Should color-themes be buffer local?

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From: Jambunathan K <kjambunathan <at> gmail.com>
To: Chong Yidong <cyd <at> gnu.org>
Cc: 11213 <at> debbugs.gnu.org
Subject: bug#11213: 24.0.95; (Maybe/Wish): Should color-themes be buffer local?
Date: Thu, 26 Apr 2012 00:37:24 +0530

[Message part 1 (text/plain, inline)]

Chong Yidong <cyd <at> gnu.org> writes:

> Jambunathan K <kjambunathan <at> gmail.com> writes:
>
>>> Probably the best way to do that is to set up face remappings in the
>>> to-be-exported buffer.  See the Face Remapping node in the Lisp manual
>>> for details.
>>
>> Given a(ny) theme, let's say "adwaita-theme.el", can someone give me a
>> recipe which runs through all the face definitions defined in that theme
>> file and hand it off to `face-remapping-alist'.
>
> Do
>
>    (get 'adwaita 'theme-settings)
>
> and collect all the face settings in the resulting list.  Each list
> element should have the form
>
>    (theme-face FACE adwaita SPEC)
>
> where FACE is a face which is customized by the theme, and SPEC is the
> face spec specified.  Once you know FACE, you probably want to
>
>   (face-spec-choose (face-default-spec FACE)
>
> to get the face attributes for the face's default (uncustomized,
> unthemed) face spec, on the selected frame.  Then you can put that
> attribute in face-remapping-alist.

Based on your suggestion this is what I have cooked up.  I am recording
what I see as problems and invite your comments.


1. Copy the attached form to color-theme.el
2. emacs -q, C-x C-f color-theme.el
3. M-x load-theme-buffer-local RET tango-dark RET
4. Look at the attached png image for a screenshot of the image.
5. Place your cursor on `load-theme-buffer-local' and C-u C-x =.  Follow
   the link to `font-lock-function-name-face'.
6. You will see that foreground color is reported as "Blue1" while /in
   fact/ the face is yellowish.
7. Now M-x htmlfontify-buffer.  I am attaching the .html file created
   by this command.  You will see that the buffer is colorized based on
   uncustomized face settings.

I believe the problems in 5-7 are related.  

I think C-u C-x = and whatever the underlying APIs that htmlfontify uses
for retrieving face properties should act on effective value and not
global values.

[color-theme.el (application/emacs-lisp, inline)]

[load-theme-buffer-local.PNG (image/png, attachment)]

[color-theme.el.html (text/html, inline)]

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