ComputeRebuildRegion sets ForceDescendIntoIfVisible on all modified frames and their ancestors,
so we can use this to detect if a display list might have modified children by looking for this
flag on the container item.
We still need to run PreProcessDisplayList on the list, so that we can remove items that belong
to a deleted frame, and build the old items array (including placeholders for the deleted items)
so that it matches our DAG.
If we wanted to skip serialization to the old items array, then we'd need to remove the deleted
item entries from the DAG too, including connecting predecessors of the deleted entry to entries
that have that deleted entry as their predecessor. That's hard to do in-place, so we leave
the empty entries in the old items list to act as placeholders until we next merge this list
properly.
Differential Revision: https://phabricator.services.mozilla.com/D27822
--HG--
extra : moz-landing-system : lando
If the frame supports it (stacking context + containing block for fixed), and a descendant was
modified, we would have created an override dirty region with just the area of that descendant.
In the case where no descendants are modified, we should use an empty rect, rather than
the area inherited from our parent.
This fixes the case where we forcibly build position:fixed frames (since they might async
scroll differently to the rest of the page), but we only need to build the container item,
not the whole frame subtree within it.
Added a test that shows us building the non-intersecting position:fixed, but not items within it.
Differential Revision: https://phabricator.services.mozilla.com/D23610
--HG--
extra : moz-landing-system : lando
If the frame supports it (stacking context + containing block for fixed), and a descendant was
modified, we would have created an override dirty region with just the area of that descendant.
In the case where no descendants are modified, we should use an empty rect, rather than
the area inherited from our parent.
This fixes the case where we forcibly build position:fixed frames (since they might async
scroll differently to the rest of the page), but we only need to build the container item,
not the whole frame subtree within it.
Added a test that shows us building the non-intersecting position:fixed, but not items within it.
Differential Revision: https://phabricator.services.mozilla.com/D23610
--HG--
extra : moz-landing-system : lando
If the frame supports it (stacking context + containing block for fixed), and a descendant was
modified, we would have created an override dirty region with just the area of that descendant.
In the case where no descendants are modified, we should use an empty rect, rather than
the area inherited from our parent.
This fixes the case where we forcibly build position:fixed frames (since they might async
scroll differently to the rest of the page), but we only need to build the container item,
not the whole frame subtree within it.
Added a test that shows us building the non-intersecting position:fixed, but not items within it.
Differential Revision: https://phabricator.services.mozilla.com/D23610
--HG--
extra : moz-landing-system : lando
The calculation of aOverflow rect for a placeholder contained in a transformed
stacking context didn't take the transform into account, leading to an incorrect
rect which artificially inflated the calculated rebuild region.
Differential Revision: https://phabricator.services.mozilla.com/D21168
--HG--
extra : moz-landing-system : lando
This patch was written entirely by the following script:
#!/bin/bash
if [ ! -d "./.hg" ]
then
echo "Not in a source tree." 1>&2
exit 1
fi
find . -regex '.*\(ref\|crash\)test.*\.list' | while read FILENAME
do
echo "Processing ${FILENAME}."
# The following has four substitutions:
# * The first one replaces the *first* argument to fuzzy() when it doesn't
# have a - in it, by replacing it with an explicit 0-N range.
# * The second one does the same for the *second* argument to fuzzy().
# * The third does the same for the *second* argument to fuzzy-if().
# * The fourth does the same for the *third* argument to fuzzy-if().
#
# Note that this is using perl rather than sed because perl doesn't
# support non-greedy matching, which is needed for the first argument to
# fuzzy-if.
perl -pi -e 's/(fuzzy\()([^ ,()-]*)(,[^ ,()]*\))/${1}0-${2}${3}/g;s/(fuzzy\([^ ,()]*,)([^ ,()-]*)(\))/${1}0-${2}${3}/g;s/(fuzzy-if\([^ ]*?,)([^ ,()-]*)(,[^ ,()]*\))/${1}0-${2}${3}/g;s/(fuzzy-if\([^ ]*?,[^ ,()]*,)([^ ,()-]*)(\))/${1}0-${2}${3}/g' "${FILENAME}"
done
Differential Revision: https://phabricator.services.mozilla.com/D2974
--HG--
extra : moz-landing-system : lando
We can unconditionally delete the item though, and just put a placeholder entry into the DAG.
MozReview-Commit-ID: 7a2UnaByIZu
--HG--
extra : rebase_source : f9cf83f09c1a6b9b23f469f7d3ab3a67f99f4018
This reftest fails without the fix in this series.
MozReview-Commit-ID: 3C8TEuCoTS3
--HG--
extra : rebase_source : 13278ee2f8f8facd38d050711330164bf9a174dd
The test invalidates the z-index element, so that we do a partial build with just that and the DAG no longer knows the relative ordering between it and the other blue elements.
We then expand the size of the 'first' elements stacking context, and ensure that we provide enough intersecting items to know that we're on top of the z-index element.
MozReview-Commit-ID: KP7c3bnwfBd
* * *
[mq]: fix
MozReview-Commit-ID: EuraqvaUS35
--HG--
extra : rebase_source : 9e2e4f2dc661cc552891499a614d489625ea895d
This makes the optimization rarer, but is significantly simpler, since we should now be guaranteed that all placeholder frames have their out of flow frames in the same stacking context.
MozReview-Commit-ID: 1Nf8Sx1dca7
--HG--
extra : rebase_source : 74856420fdf6108fe749c94418a20bc9faa6fc5e
The test invalidates the z-index element, so that we do a partial build with just that and the DAG no longer knows the relative ordering between it and the other blue elements.
We then expand the size of the 'first' elements stacking context, and ensure that we provide enough intersecting items to know that we're on top of the z-index element.
MozReview-Commit-ID: 13aRGm1eucp
--HG--
extra : amend_source : 11d530fbec816b3dbcfa7228625e0ba0e73064d0
