From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nick Dokos <ndokos@gmail.com>
Subject: Re: [RFC] <img> vs <object> in HTML export
Date: Fri, 10 Jan 2014 14:12:06 -0500
Message-ID: <87r48f3b3t.fsf@alphaville.bos.redhat.com>
References: <87vbxsamjm.fsf@alphaville.bos.redhat.com>
	<cf32d8f09aa9412b50e9369e0471da9d@mail.rickster.com>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:48874)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1W1hVJ-0003TA-Jh
	for emacs-orgmode@gnu.org; Fri, 10 Jan 2014 14:12:31 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1W1hVE-0001RM-3Q
	for emacs-orgmode@gnu.org; Fri, 10 Jan 2014 14:12:25 -0500
Received: from plane.gmane.org ([80.91.229.3]:33795)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1W1hVD-0001RG-Rr
	for emacs-orgmode@gnu.org; Fri, 10 Jan 2014 14:12:20 -0500
Received: from list by plane.gmane.org with local (Exim 4.69)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1W1hVC-0001YF-5D
	for emacs-orgmode@gnu.org; Fri, 10 Jan 2014 20:12:18 +0100
Received: from nat-pool-bos-t.redhat.com ([66.187.233.206])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Fri, 10 Jan 2014 20:12:18 +0100
Received: from ndokos by nat-pool-bos-t.redhat.com with local (Gmexim 0.1
	(Debian)) id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Fri, 10 Jan 2014 20:12:18 +0100
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: emacs-orgmode@gnu.org

Rick Frankel <rick@rickster.com> writes:

>> BTW, I tried using
>
>> <object data="foo.png" type="image/png"/>
>
> This does not work because the close tag is required according to the
> spec (like a script tag).
>

Yes, I figured that that was probably the case, even though FF seemed to
accept it (although I'm no longer sure what I have and have not
tried...) The primary reason I considered it was because
org-html-close-tag currently produces that form and I was trying to be
as non-intrusive (a.k.a. lazy) as possible.

> From a quick read on the interwebs, yes, it seems that <object> is an
> html4 specification. One problem with your solution, is that <object>
> does not allow an 'alt' attribute
>

I don't know if it's part of the standard or yet another hack but I
found this:

      http://www.w3schools.com/tags/tag_object.asp

in particular the Note in "Tips and Notes", which seems to imply that I can do

  <object data="foo.png" type="image/png"><img src="foo.png" alt="foo.png"/></object>

to accommodate browsers which don't recognize the <object> tag, as well
as accommodating the absence of a foo.png file (or the disallowing of
images). In my limited testing, that seems to work if the file is abesnt.

> The problem w/ <img src='foo.svg"/> according to my reading, is that
> it is not officially supported, and is only incidentally supported by
> the browsers (but, as you can see, without svg interactivity).
>
> I thing the solution is to use an <object> tag for svg, but an <img>
> tag for the rest. It might also make sense to just inline the svg?
>

If the above form works with all browsers, I'd prefer to go with that.
If it's actually part of a standard, I think it would be the perfect
solution, but I'm not holding my breath about that.

I have a patch (much better than the original one) that implements this.
I'll post it this weekend for comments.

> see:
> http://www.w3.org/Graphics/SVG/IG/resources/svgprimer.html#SVG_in_HTML
> for an interesting writeup on the issues.
>

I found that one in my search but I was somewhat discouraged by the
number of pages (167) and its age (2010) and I did not really try to
read it carefully. But I've taken another look at the section you point
out and it is indeed a good reference - thanks for pushing me towards
it!

And thanks for the comments!

Nick