Latex preview foreground color problem

Latex preview foreground color problem

[Jarmo Hurri]

Greetings.

Previewing Latex fragments is one cool feature. However, I have one
problem tailoring it to my use.

In my emacs config file I now have:

(plist-put org-format-latex-options :foreground "white")
(plist-put org-format-latex-options :scale 2)

These seem to set the correct properties, because my value of
org-format-latex-options is

(:foreground "white" :background default :scale 2 :html-foreground "Black" :html-background "Transparent" :html-scale 1.0 :matchers
             ("begin" "$1" "$" "$$" "\\(" "\\["))

The scale factor property works just fine: I get a larger
preview. Unfortunately changing foreground has no effect. The default
black foreground - which I still get - is pretty useless for me, because
my default background in buffers is dark blue.

Any tips?

Jarmo

Re: Latex preview foreground color problem

[Eric S Fraga]

On Monday, 30 Jul 2018 at 12:43, Jarmo Hurri wrote:
> In my emacs config file I now have:
>
> (plist-put org-format-latex-options :foreground "white")
> (plist-put org-format-latex-options :scale 2)

This works for me but in the context that I also change the background
to black (which does not necessarily match my Emacs background...).  Try
that just to see?  It may be a LaTeX issue.

-- 
Eric S Fraga via Emacs 27.0.50, Org release_9.1.13-894-gf79545

Re: Latex preview foreground color problem

[Jeremie Juste]

Hello,

Here is mine. But I live with a black background. You might have trouble
with the table environment though. For some mysterious reason, although
the background changes,the foreground in the table environment remains black.

(setq org-format-latex-options '(:foreground  "White"  :background "Black" :scale 1.8
				 :html-foreground "Black"
				 :html-background "Transparent" :html-scale 1.1 ))

HTH,
Jeremie

Re: Latex preview foreground color problem

[Jarmo Hurri]

Eric S Fraga <esflists@gmail.com> writes:

> On Monday, 30 Jul 2018 at 12:43, Jarmo Hurri wrote:
>> In my emacs config file I now have:
>>
>> (plist-put org-format-latex-options :foreground "white")
>> (plist-put org-format-latex-options :scale 2)
>
> This works for me but in the context that I also change the background
> to black (which does not necessarily match my Emacs background...).  Try
> that just to see?  It may be a LaTeX issue.

This seems to be a compatibility issue with the forest package in
Latex. The problem is demonstrated and explained in the org file
below. I don't know yet what the solution is.

Jarmo

# ---------------------------------------------------------------------

#+LATEX_HEADER: \usepackage{forest}

* \LaTeX{} fragments: package ~forest~ confuses foreground color setting 
  Interestingly enough, the foreground color set by
  #+BEGIN_SRC elisp
  (plist-put org-format-latex-options :foreground "White")
  #+END_SRC
  does /not/ change the foreground color in this simple invariant
  equation \[ ab^n = ab\cdot b^{n-1} \] if ~usepackage{forest}~ is
  included in \LaTeX{} header. When package ~forest~ is not used,
  setting the color works just fine.

  To make things a bit more complicated, after commenting or
  uncommenting the ~LATEX_HEADER~ line, you need to remove the
  contents of directory ~ltximg~ in the working directory to see the
  difference, because the system caches the generated images of the
  equations there.