Re: ps-print-color-p and the background colour of Emacs' frame

[Christian Schlauer]

Vinicius Jose Latorre <address@hidden> writes:

> Christian Schlauer wrote:

[...]

>> I'm still using Emacs 22.1 -- I'll test it "soon" ;-)
>>   
>
> Ok, please, let me know the results of your tests.

I updated my EMACS_22_BASE checkout and did

emacs -q --no-site-file

C-u M-x ps-print-buffer-with-faces RET C-g

M-x set-variable RET ps-default-bg RET frame-parameter RET

The last line is necessary in Emacs 22.1.50 as `ps-default-bg' is nil
now by default (as you wrote):

>>> PS: I fixed the problems below and also set ps-default-fg and
>>> ps-default-bg to nil, so the default colors are black for foreground
>>> and white for background.

Then I repeated the test sequences mentioned in my original posting.
Everything works as expected: the background of the PS files is white
_unless_ I set `ps-default-bg' to `frame-parameter' _and_
`ps-print-color-p' is t (the default). Thank you!

There is only an inaccurate doc string:

,----[ C-h v ps-default-bg RET ]
| It's used only when `ps-print-color-p' is non-nil.
`----

Correct is "It's used only when `ps-print-color-p' is not nil or
black-white." -- see below:

,----[ C-h v ps-print-color-p RET ]
| ps-print-color-p is a variable defined in `ps-print.el'.
| Its value is t
| 
| 
| Documentation:
| *Specify how buffer's text color is printed.
| 
| Valid values are:
| 
|    nil                Do not print colors.
| 
|    t          Print colors.
| 
|    black-white        Print colors on black/white printer.
|               See also `ps-black-white-faces'.
| 
| Any other value is treated as t.
| 
| You can customize this variable.
`----