From: Greg Sexton <gsexton@amazon.co.uk>
To: emacs-orgmode@gnu.org
Subject: Base 64 inline images in html export
Date: Mon, 7 Dec 2015 12:15:54 +0000 [thread overview]
Message-ID: <cieptky4d6lait.fsf@amazon.co.uk> (raw)
Hi,
I did find a post about this from around 2009 but I'm not sure it went
anywhere. It's very useful for me to be able to export a single html
file that I can distribute around. Base 64 encoding images directly in
to the exported html makes this possible.
The feature seems fairly well supported by browsers these days.[1]
I've hacked up this ugly proof of concept. I guess it wouldn't take too
much to productionize this and make the behavior configurable. Any
thoughts?
--8<---------------cut here---------------start------------->8---
(defun gs/b64-img (file-uri)
(let ((file (s-replace "file://" "" file-uri)))
(if (f-exists? file)
;; src="data:image/png;base64,iVBORw0KGgoAAAANSUh..."
(s-concat "data:image/"
(f-ext file)
";base64,"
(base64-encode-string (f-read-bytes file)))
file-uri)))
(defun org-html--format-image (source attributes info)
"Return \"img\" tag with given SOURCE and ATTRIBUTES.
SOURCE is a string specifying the location of the image.
ATTRIBUTES is a plist, as returned by
`org-export-read-attribute'. INFO is a plist used as
a communication channel."
(org-html-close-tag
"img"
(org-html--make-attribute-string
(org-combine-plists
(list :src (gs/b64-img source) ; <-- interesting line is here
:alt (if (string-match-p "^ltxpng/" source)
(org-html-encode-plain-text
(org-find-text-property-in-string 'org-latex-src source))
(file-name-nondirectory source)))
attributes))
info))
--8<---------------cut here---------------end--------------->8---
[1]: http://stackoverflow.com/questions/1207190/embedding-base64-images
--
Greg
Amazon Development Centre (London) Ltd. Registered in England and Wales with registration number 04543232 and which has its registered office at Leadenhall Court, One Leadenhall Street, London EC3V 1PP, United Kingdom.
next reply other threads:[~2015-12-07 12:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-07 12:15 Greg Sexton [this message]
2015-12-08 18:47 ` Base 64 inline images in html export Rasmus
2015-12-23 1:48 ` Grant Rettke
2015-12-23 2:04 ` John Kitchin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cieptky4d6lait.fsf@amazon.co.uk \
--to=gsexton@amazon.co.uk \
--cc=emacs-orgmode@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.