Re: ps-print-buffer-with-faces doesn't use selected frame's background

[Vinicius Jose Latorre]

Richard Stallman wrote:
>     4. start new Emacs session
>
>     5. type: C-h v ps-default-bg RET
>        ==>> "#ffffff" (white)
>
> That is quite strange, because when I do emacs -Q and 
> C-h v ps-default-bg RET it says that variable isn't defined.
>
> I wonder, have you done something to cause ps-print to be preloaded?
>   

Well, the ps-print commands have a comment:

;;;###autoload

just before the command definition.

When I start Emacs with -Q, typing  C-h v ps- TAB  appears some options 
to complete but ps-default-bg is not among them, only 
ps-multibyte-buffer, ps-page-dimensions-database, ps-paper-type and 
ps-print-color-p. And these options have the comment ";;;###autoload" 
just before the variable definition.


>     2. set in emacs/lisp/ps-print.el file:
>        (defcustom ps-default-bg (frame-parameter nil 'background-color))
>
> Please try this:
>
>        (defcustom ps-default-bg (progn (debug) (frame-parameter nil 
> 'background-color)))
>
> Then you will go into the debugger when that initialization gets run,
> and you can see when it gets done, and what code runs it.
>   

Humm, trying the initialization above, I can see that ps-print is loaded 
before .emacs file is loaded. So, the background is white when ps-print 
is loaded and, only during .emacs loading, the background is changed.


>     >     If the variables have a value (let's say, 'frame-parameter), the value 
>     >     of them is calculated when any ps-print command is activated. And it's 
>     >     used frame-parameter function to get the color value.
>     >
>
> With your explanation, I now understand that idea, and I think it is a
> good one.
>   

Ok, could I implement it now in Emacs 22 before the release?