gecko-dev/layout/generic/crashtests/1304441.html
Ting-Yu Lin 570d1f0e83 Bug 1304441 Part 3 - Insert main summary's frame construction item at front of the list. r=bz
Change the logic that moves the main summary to the front from operating
on generated frames in DetailsFrame::SetInitialChildList() to operating
on frame construction item list in AddFrameConstructionItemsInternal()
so that it will be correct when cooperating with ::first-line.

The root cause of the bug reported is because when specifying
::first-line on details element, the first frame of summary element,
which is generated due to ib-split, will be wrapped in nsFirstLineFrame.
The original code fails to find the summary frame in the wrapper frame
and triggers assertion because of the second ib-split summary frame. To
fix that, we need to descend into the child list of wrapper frames when
checking the main summary.

Add original test case as a crashtest as well as reftests to clearly
reproduce the issue.

Note that in the reftest, the blue color in ::first-line is applied
incorrectly to the second line in the summary due to bug 520605.

MozReview-Commit-ID: Bv4Vcvxp6pY
2016-10-05 14:43:32 +08:00

10 lines
84 B
HTML

<details>
<summary>
<li>
<style>
summary{
all:initial
}
:first-child::first-line
{}