On Mon, Dec 06 2010, Lars Magne Ingebrigtsen wrote:
> Let's see...  yup:
>
>     (when (and style
> 	       (string-match "color" style))
>       (setq shr-stylesheet (nconc (shr-parse-style style)
> 				  shr-stylesheet)))
>
> We add our stuff to what our parent(s) had...

I think you're cheating. :)

Yes you are inheriting, I did not change that code, but the parent did
not set the background-color in shr-styleshset. It does now that I
changed some code to things like:

 (defun shr-tag-font (cont)
-  (let ((start (point))
-        (color (cdr (assq :color cont))))
-    (shr-generic cont)
-    (shr-colorize-region start (point) color)))
+  (let* ((start (point))
+         (color (cdr (assq :color cont)))
+         (shr-stylesheet (if color
+                             `((color . ,fgcolor) ,@shr-stylesheet)
+                           shr-stylesheet)))
+    (shr-generic cont)))

OTOH, there was a subtle bug. You wrote:
        (shr-stylesheet (list (cons :color fgcolor)
                              (cons :background-color bgcolor))))

Initially, where as it should have been 'color and 'background-color
(: vs quote).
So maybe I fixed too much stuff because of that. ;)

>     (let ((color (cdr (assq 'color shr-stylesheet)))
> 	  (background (cdr (assq 'background-color
> 				 shr-stylesheet))))
>       (when (and shr-stylesheet
> 		 (or color background))
> 	(shr-colorize-region start (point) color background)))))
>
> ... and then use it.
>         
> Should work, I think.  Well, actually, it's rendering things too much --
> it should have a (and (string-match "color" style)) in there, too,
> probably.

shr-colorize-region does nothing if both colors are nil, so I don't
think there is too much to optimize here, unless assq is considered to
be slow (I don't know).

-- 
Julien Danjou
// ᐰ <julien@danjou.info>   http://julien.danjou.info