We don't extend svg elements, except in a lone test, that isn't really impacted
by this.
I agree this should look at the frame btw, though that looks a bit out of scope
for this bug.
MozReview-Commit-ID: MbvIE5TszB
The new StaticPrefs machinery means that StylePrefs can be removed.
Note that this approach mirrors all static prefs into Rust, but I have only
updated structs.rs for the prefs that Stylo uses.
On a CLOSED TREE, since a sheriff closed the tree while I was about to land this
via autoland.
MozReview-Commit-ID: G1SY0987WJ7
Each nsStaticAtomSetup contains a pointer to a static atom, and also a pointer
to the canonical pointer to that static atom. Which is pretty weird! The
notable thing thing about it is that these structs are in an array, and that
gives us the only way to iterate over all static atoms in a single class, for
registration and lookups.
But thanks to various other recent changes to the implementation of static
atoms, we can now put the static atoms themselves into an array, which can be
iterated over. So this patch does that. With that done, nsStaticAtomSetup is no
longer necessary.
According to the `size` utility, on Linux64 this reduces the size of libxul.so
by the following amounts:
> text: 62008 bytes
> data: 20992 bytes
> bss: 21040 bytes
> total: 104040 bytes
- The bss reduction is one word per atom, because the canonical static atom
pointers (e.g. nsGkAtoms::foo) have moved from .bss to .data, because they're
now initialized at compile time instead of runtime.
- The data reduction is one word per atom, because we remove two words per atom
for the nsStaticAtomSetup removal, but gain one word per atom from the
previous bullet point.
- I'm not sure about the text reduction. It's three words per atom. Maybe
because there is one less relocation per atom?
Other notable things in the patch:
- nsICSSAnonBoxPseudo and nsICSSPseudoElement now inherit from nsStaticAtom,
not nsAtom, because that's more precise.
- Each static atoms array now has an enum associated with it, which is used in
various ways.
- In the big comment about the macros at the top of nsStaticAtom.h, the pre-
and post-expansion forms are now shown interleaved. The interleaving reduces
duplication and makes the comment much easier to read and maintain. The
comment also has an introduction that explains the constraints and goals of
the implementation.
- The SUBCLASS macro variations are gone. There are few enough users of these
macros now that always passing the atom type has become simpler.
MozReview-Commit-ID: 1GmfKidLjaU
--HG--
extra : rebase_source : 2352590101fc6693ba388f885ca4714a42963943
For nsCSSAnonBoxes.cpp, nsCSSPseudoElements.cpp, nsDirectoryService.cpp, the
corresponding .h file includes nsStaticAtom.h. For the other files in this
patch, nsStaticAtom.h is not needed at all.
MozReview-Commit-ID: IpMmbXwZHhu
--HG--
extra : rebase_source : 46d0a6b40a41ee233adad7c205cf907fa27de34a
This patch adds three test cases;
1) Animation on position:absolute element in a zero-height iframe
This animation should be throttled.
2) Animation on a non-zero width and hight position:absolute element but whose
parent has a zero height
This animation should NOT be throttled since the animation is visible
3) Animation on a zero-height position:absolute element whose parent also has
zero height.
This animation should be throttled since the animation is invisible
The first test fails without this fix and passes with the fix.
The second one passes regardless of the fix
The third one is marked as 'todo' since it doesn't pass with this fix.
MozReview-Commit-ID: 8pNUFQ71ivj
--HG--
extra : rebase_source : d1d37e5324247efc20a39d86a0f8849450cc7533
BACKGROUND:
Early in flex layout, we have to resolve the 'flex-basis' value to produce the
"flex base size" (basically, the flex-basis resolved to an absolute length).
This resolution happens in two "phases" (which both happen within
nsFlexContainer::GenerateFlexItemForChild()):
First phase: we try to resolve the flex-basis by creating a ReflowInput for the
flex item (which gets us some other things as well). Under the hood, we use
the flex-basis when resolving this ReflowInput's main-axis size. The code for
this lives in nsFrame::ComputeSize (and in
nsFrame::ComputeSizeWithIntrinsicDimensions, via some frame classes' overrides of
ComputeSize).
Second phase: If the first phase didn't get us a definite size, then that means
we have to do reflow to measure the content size & produce a resolved flex base
size, which we do via ResolveAutoFlexBasisAndMinSize().
NOTES ON THIS PATCH:
To add 'flex-basis:content' support to layout, this patch only needs to modify
the first phase discussed above. If it turns out we also have some second-phase
work to do (i.e. if we need to do reflow to resolve 'flex-basis:content'), this
patch causes that reflow to happen by simply making us use eStyleUnit_Auto in
the main axis's nsStyleCoord in the first phase. (And then, if that 'auto'
nsStyleCoord really does require reflow, then that first phase will end up
producing an unconstrained main-size in the flex item's ReflowInput, which will
automatically trigger the second phase.)
MozReview-Commit-ID: 2nH4Fh78C81
AccessibleCaretManager uses scroll and reflow observers to detect when
to update the position of carets. However, it currently only registers
the observers on the leaf docshell, so only changes in the innermost
iframe are detected; that is, it fails to update caret position when an
ancestor iframe is scrolled. This patch makes it register observers on
all ancestor docshells so that changes in ancestor iframes are detected
as well.
MozReview-Commit-ID: bwiSjj8936
--HG--
extra : rebase_source : d567f1d8df67f79769c6532b061e2df1e5ab878f
When we finish decoding an image frame, we need to trigger reflow for the
frame containing a float with shape-outside: <image>, and delay the firing
of the document's onload event until that reflow is complete.
When we finish decoding an image frame, we need to trigger reflow for the
frame containing a float with shape-outside: <image>, and delay the firing
of the document's onload event until that reflow is complete.
