Bug 179681 – Cleanup code for RenderMathMLUnderOver::layoutBlock

• Component: MathML
• Status: RESOLVED FIXED

[Minsheng Liu]

See the discussion of https://bugs.webkit.org/show_bug.cgi?id=170272.

> Checking the code, it seems that RenderMathMLUnderOver::computeOperatorsHorizontalStretch is actually only called in RenderMathMLUnderOver::layoutBlock, just before some calls to layoutIfNeeded() on the munderover children... but I believe these layoutIfNeeded calls are useless as we already do the layout in computeOperatorsHorizontalStretch. Also, computeOperatorsHorizontalStretch really does operator stretching and child layout, so the name is not good (I guess this was inherited from old implementation). So I propose you open a preliminary cleanup bug to rename "computeOperatorsHorizontalStretch" to "stretchHorizontalOperatorsAndLayoutChildren" and remove the useless layoutIfNeeded calls, so that things are a bit clearer. That won't require new tests and you would be able to experience the contribution process.

[Frédéric Wang (:fredw)]

So more precisely, I was proposing:

1. Rename "computeOperatorsHorizontalStretch" to "stretchHorizontalOperatorsAndLayoutChildren".
2. Replace layoutIfNeeded() calls in RenderMathMLUnderOver::layoutBlock() with:
   ASSERT(!base().needsLayout());
   ASSERT(m_scriptType == Over || !under().needsLayout());
   ASSERT(m_scriptType == Under || !over().needsLayout());

[Minsheng Liu]

Created attachment 327588 [details]
Patch

[EWS Watchlist]

Attachment 327588 [details] did not pass style-queue:


ERROR: Source/WebCore/ChangeLog:8:  You should remove the 'No new tests' and either add and list tests, or explain why no new tests were possible.  [changelog/nonewtests] [5]
Total errors found: 1 in 3 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Minsheng Liu]

Created attachment 327589 [details]
Patch

[Frédéric Wang (:fredw)]

Comment on attachment 327589 [details]
Patch

Thanks!

[WebKit Commit Bot]

Comment on attachment 327589 [details]
Patch

Clearing flags on attachment: 327589

Committed r225148: <https://trac.webkit.org/changeset/225148>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/35690291>