Bug 93358 - inline-block span positioned "relative" inside foreignObject are not scaled correctly
Summary: inline-block span positioned "relative" inside foreignObject are not scaled c...
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Normal
Assignee: Nobody
Depends on:
Blocks: mathjax 126516
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Reported: 2012-08-07 05:33 PDT by Frédéric Wang (:fredw)
Modified: 2017-07-18 08:27 PDT (History)
6 users (show)

See Also:

testcase (473 bytes, text/html)
2012-08-07 05:33 PDT, Frédéric Wang (:fredw)
no flags Details
Another test case. (697 bytes, text/html)
2012-11-18 21:41 PST, Neil
no flags Details

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Description Frédéric Wang (:fredw) 2012-08-07 05:33:27 PDT
Created attachment 156918 [details]

A MathJax user reported that the HTML+CSS code generated by MathJax to display mathematical formulas is not rendered correctly in Webkit when scaled inside SVG:


The code generated by MathJax contains many <span>'s and it's hard to say what the problem is. However, I think I have isolated one issue with <span style="display: inline-block; position: relative;">, which are used everywhere in the generated code.

In the attached testcase, such a span is used to draw a 50x50 red rectangle. I use SVG to scale it by a factor of 2. In Firefox, it thus fits in the 100x100 black frame. However in Webkit this rectangle is still rendered with a size of 50x50. Note that if you use "position: static;", it is correctly scaled.
Comment 1 Frédéric Wang (:fredw) 2012-08-07 05:37:46 PDT
Of course, this affects both coordinates and size. You can try to use "left: 25px; top: 25px; width: 25px; height: 25px;" in the testcase.
Comment 2 Neil 2012-11-18 21:41:40 PST
Created attachment 174887 [details]
Another test case.

This bug prevents the use of Closure UI widgets in SVG.  Attached is an independently created testcase.  Works fine in Gecko.
Comment 3 Eric Seidel 2012-11-18 22:01:47 PST
SVG trees don't have RenderLayers.  It's a loooong standing bug. :(