Bug 118737 (displaystyle) - Add support for displaystyle
Summary: Add support for displaystyle
Alias: displaystyle
Product: WebKit
Classification: Unclassified
Component: MathML (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Normal
Assignee: Nobody
URL: http://www.w3.org/TR/2010/REC-MathML3...
Depends on: 99620 133845 155542 155638 155639 155714
Blocks: 3251 mathml-in-mathjax 124907
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Reported: 2013-07-16 09:49 PDT by Frédéric Wang (:fredw)
Modified: 2016-07-11 11:57 PDT (History)
3 users (show)

See Also:

testcase (1.00 KB, text/html)
2013-07-16 09:49 PDT, Frédéric Wang (:fredw)
no flags Details

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Description Frédéric Wang (:fredw) 2013-07-16 09:49:06 PDT
Created attachment 206790 [details]

<math display="block"> and <math display="inline"> currently display the formula as a block or inline box. However, they should also set the initial value of displaystyle to true and false respectively. The displaystyle value can also be set via an explicit displaystyle attribute and is reset to false by some elements (like mfrac, scripts, roots etc). When displaystyle=true, the operators marked largeop (either via an explicit attribute or as computed from the operator dictionary) should be drawn larger. When displaystyle=false, the operators marked movablelimits (either via an explicit attribute or as computed from the operator dictionary) should have its under/over limits drawn as sub/sup. See the testcase, where a sum symbol is used (largeop and movablelimits per the operator dictionary).

See also bucket 3 of the MathML Acid3 tests:

See chapter 3 of the MathML spec for details:
Comment 1 Frédéric Wang (:fredw) 2016-07-11 11:57:21 PDT
Displaystyle maybe be involved in other cases (e.g. in scriptlevel incrementation, see bug 49309) but I think we now support the most important cases (largeop, movablelimits and some choice of MATH constants). So I guess we can close this bug.