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https://issues.apache.org/jira/browse/WICKET-2192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772070#action_12772070
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Esko Suomi commented on WICKET-2192:
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While all the DTD:s of HTML4 and XHTML 1.0 specify width and height as implied
(W3C's term for optional) and you are right in a sense, the actual issue
specifies a very common behavior within the most popular browsers. This
enhancement is purely chrome, but sometimes chrome means a lot, especially to
the customers and that's why this is a would-be-nice-to-have feature.
I guess I should point out that at my work we do have a custom Image (and a
non-caching variant) component nowadays which does this very thing, however
since it uses our internal classes for the image width/height extraction I
can't share the code with the Wicket project. So it's doable and I can
quarantee it'll be fast as long as you stay away from ImageIO and use
BufferedInputStreams wisely.
> Image should automatically set width and height attributes in markup
> --------------------------------------------------------------------
>
> Key: WICKET-2192
> URL: https://issues.apache.org/jira/browse/WICKET-2192
> Project: Wicket
> Issue Type: Improvement
> Affects Versions: 1.4-RC2
> Reporter: Esko Suomi
> Priority: Trivial
> Attachments: ImageDocumentProcessor.java
>
>
> org.apache.wicket.markup.html.image.Image component (and all possible
> derivates) should add width and height attributes of the image it represents
> automatically to markup to allow for faster correct rendering of the actual
> page. For example when rendering a table with images in table cells the table
> cell width may vary a lot during loading of the page and its contents which
> causes the table to jitter around while loading if image dimension attributes
> aren't set.
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