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* [TIP] Export to LaTeX and HTML with a watermark
@ 2020-12-23  2:11 Juan Manuel Macías
  2020-12-23  2:38 ` Thomas S. Dye
  0 siblings, 1 reply; 2+ messages in thread
From: Juan Manuel Macías @ 2020-12-23  2:11 UTC (permalink / raw)
  To: orgmode

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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))
	    ((org-export-derived-backend-p org-export-current-backend 'html)
	     (concat "@@html:<p id=\"watermark\">"
		     (if text
			 (format "%s" text)


The CSS could be (source:

#+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>

And then, this replacement macro:

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

And finally, an example:

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

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



Juan Manuel

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2020-12-23  2:11 [TIP] Export to LaTeX and HTML with a watermark Juan Manuel Macías
2020-12-23  2:38 ` Thomas S. Dye

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