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layout_2020: Use ArcRefCell to track hoisted fragments

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This avoids the use of lookup tables for containing blocks when
constructing the stacking context tree.

This seems to catch some laid-out hoisted fragments that were otherwise
dropped in the previous design. The changes cause one new test to pass
and one to fail. Visual examination of the failing tests reveals that
it's a progression (list markers are appearing when they were previously
not rendered).
This commit is contained in:
Martin Robinson 2020-03-25 16:32:33 +01:00
parent ebaa73ddcd
commit 19f4b708b3
8 changed files with 105 additions and 157 deletions
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2
tests/wpt/mozilla/meta-layout-2020/css/absolute_hypothetical_with_intervening_inline_block_a.html.ini
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@ -1,2 +0,0 @@
[absolute_hypothetical_with_intervening_inline_block_a.html]
expected: FAIL

2
tests/wpt/mozilla/meta-layout-2020/css/list_item_marker_around_float.html.ini Normal file
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@ -0,0 +1,2 @@
[list_item_marker_around_float.html]
expected: FAIL