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Re: [TIP] Export to LaTeX and HTML with a watermark


From: Thomas S. Dye
Subject: Re: [TIP] Export to LaTeX and HTML with a watermark
Date: Tue, 22 Dec 2020 16:38:06 -1000
User-agent: mu4e 1.2.0; emacs 26.3

Nice!

This is the kind of thing I like to find here: https://orgmode.org/worg/org-hacks.html

Please consider adding it to Worg!

All the best,
Tom

Juan Manuel Macías writes:

Hi,

Recently, I needed to export a document to both LaTeX and HTML with a watermark background. I came to write this little function (for LaTeX, the 'draftwatermark' package is used; for html, a bit of CSS. The optional arg `text' is the text of the watermark; by default what is
printed is "DRAFT"):

#+begin_src org
  ,#+begin_src emacs-lisp :exports results :results none
    (defun my-watermark (&optional text)
(cond ((org-export-derived-backend-p org-export-current-backend 'latex)
             (concat "#+LaTeX_Header:\\usepackage"
                     (if text
(format "[text=%s]" (replace-regexp-in-string " " "~" text))
                       "")
                     "{draftwatermark}"))
((org-export-derived-backend-p org-export-current-backend 'html)
             (concat "@@html:<p id=\"watermark\">"
                     (if text
                         (format "%s" text)
                       "DRAFT")
                     "</p>@@"))))

  ,#+end_src
#+end_src

The CSS could be (source:
https://stackoverflow.com/questions/68569/text-watermark-on-website-how-to-do-it):

#+begin_src org
,#+html_HEAD: <style>#watermark {color: #d0d0d0; font-size: 200pt; -webkit-transform: rotate(-45deg); -moz-transform: rotate(-45deg); position: absolute; width: 100%; height: 100%; margin: 0; z-index: -1; left:-100px; top:-200px;}</style>
#+end_src

And then, this replacement macro:

#+begin_src org
,#+MACRO: wmark (eval (if (org-string-nw-p $1)(my-watermark $1)(my-watermark)))
#+end_src

And finally, an example:

#+begin_src org
  {{{wmark(Top secret!)}}}

  Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
  accumsan nisl.

  (...)
#+end_src

Regards,

Juan Manuel


--
Thomas S. Dye
https://tsdye.online/tsdye



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