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ox-html: Use <img> tags for svgs, not <object>

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* 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).
This commit is contained in:
TEC 2021-04-07 19:07:53 +08:00 committed by Bastien Guerry
parent 38842b2ffa
commit d96e897579
1 changed files with 12 additions and 37 deletions
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49
lisp/ox-html.el
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@ -1693,43 +1693,18 @@ 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."
(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.