From: Timothy <tecosaur@gmail.com>
To: org-mode-email <emacs-orgmode@gnu.org>
Subject: [PATCH] Use <img> tags for SVGs
Date: Wed, 07 Apr 2021 19:24:26 +0800 [thread overview]
Message-ID: <87k0pemj6d.fsf@gmail.com> (raw)
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Hey everyone,
This is the first patch addressing an item raised in
https://orgmode.org/list/87sga4914t.fsf@gmail.com/ [subject: W3C
violations in Org's HTML export].
For more information see the email mentioned above and/or the commit
message.
It's worth nothing that the current approach isn't just "not great", but
actually causes some issues. For instance, in the ox-html export of my
Emacs config, here's an SVG generated by Gnuplot with org-plot:
[-- Attachment #2: svg-object.png --]
[-- Type: image/png, Size: 45527 bytes --]
[-- Attachment #3: Type: text/plain, Size: 66 bytes --]
If I just change <object> to <img> this is much better behaved:
[-- Attachment #4: svg-img.png --]
[-- Type: image/png, Size: 47244 bytes --]
[-- Attachment #5: Type: text/plain, Size: 69 bytes --]
Anyway, that's enough preamble --- here's the patch :)
--
Timothy
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[-- Attachment #6: 0001-ox-html-Use-img-tags-for-svgs-not-object.patch --]
[-- Type: text/x-patch, Size: 3210 bytes --]
From 9c041f16a947309d47c5a162146946268788d459 Mon Sep 17 00:00:00 2001
From: TEC <tec@tecosaur.com>
Date: Wed, 7 Apr 2021 19:07:53 +0800
Subject: [PATCH] ox-html: Use <img> tags for svgs, not <object>
* lisp/ox-html.el (org-html--format-image, org-html--svg-image): Remove
special treatment of SVGs with <object>, and just use <img>. This used
to be poorly supported, but since Firefox 4 / Chrome 28 / Safari 9 this
is no longer a concern (https://caniuse.com/svg-img) and the last
browser release that didn't support SVG images was in 2010 (SVG data
URIs took until 2015 to be fully supported, but this is a lesser
concern).
---
lisp/ox-html.el | 49 ++++++++++++-------------------------------------
1 file changed, 12 insertions(+), 37 deletions(-)
diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index 89da823e8..adda7365e 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -1693,43 +1693,18 @@ (defun org-html--format-image (source attributes info)
ATTRIBUTES is a plist, as returned by
`org-export-read-attribute'. INFO is a plist used as
a communication channel."
- (if (string= "svg" (file-name-extension source))
- (org-html--svg-image source attributes info)
- (org-html-close-tag
- "img"
- (org-html--make-attribute-string
- (org-combine-plists
- (list :src source
- :alt (if (string-match-p
- (concat "^" org-preview-latex-image-directory) source)
- (org-html-encode-plain-text
- (org-find-text-property-in-string 'org-latex-src source))
- (file-name-nondirectory source)))
- attributes))
- info)))
-
-(defun org-html--svg-image (source attributes info)
- "Return \"object\" embedding svg file SOURCE with given ATTRIBUTES.
-INFO is a plist used as a communication channel.
-
-The special attribute \"fallback\" can be used to specify a
-fallback image file to use if the object embedding is not
-supported. CSS class \"org-svg\" is assigned as the class of the
-object unless a different class is specified with an attribute."
- (let ((fallback (plist-get attributes :fallback))
- (attrs (org-html--make-attribute-string
- (org-combine-plists
- ;; Remove fallback attribute, which is not meant to
- ;; appear directly in the attributes string, and
- ;; provide a default class if none is set.
- '(:class "org-svg") attributes '(:fallback nil)))))
- (format "<object type=\"image/svg+xml\" data=\"%s\" %s>\n%s</object>"
- source
- attrs
- (if fallback
- (org-html-close-tag
- "img" (format "src=\"%s\" %s" fallback attrs) info)
- "Sorry, your browser does not support SVG."))))
+ (org-html-close-tag
+ "img"
+ (org-html--make-attribute-string
+ (org-combine-plists
+ (list :src source
+ :alt (if (string-match-p
+ (concat "^" org-preview-latex-image-directory) source)
+ (org-html-encode-plain-text
+ (org-find-text-property-in-string 'org-latex-src source))
+ (file-name-nondirectory source)))
+ attributes))
+ info))
(defun org-html--textarea-block (element)
"Transcode ELEMENT into a textarea block.
--
2.30.1
next reply other threads:[~2021-04-07 11:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-07 11:24 Timothy [this message]
2021-04-07 11:29 ` Timothy
2021-04-26 7:54 ` Bastien
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