CSS-ALIGN-3 tells us that `normal` behavior inside flex containers is
simply to behave as `stretch` so this patch makes them behave the same
inside FFC.
Furthermore, we change the `align-items` initial value to `normal`,
matching other engines.
This saves us from having to manually write these every time we add a
new type of StyleValue:
- bool is_foo() const;
- FooStyleValue const& as_foo() const;
- FooStyleValue& as_foo();
Avoid unintentionally converting between float and double multiple times
by just using double everywhere. Also, remove the unused `int` versions
of their constructors.
This interface is used in the interface for HTMLFormControlsCollection
as a live view over its matching elements.
Currently the "value" attribute for this interface is left
unimplemented.
Eventually we should not need the layout tree for anything when painting
and this code will only look at the paint tree. For now, this is just
another step in that direction.
I'm about to make StackingContext traverse the paintable tree instead of
actually traversing the layout tree, and it turns out we were not
creating paintables for these SVG elements.
Also switch them to Layout::Box instead of the default InlineNode to
make the trees look a bit less weird. Ultimately, we should do something
specialized for these subtrees, but for now this'll do.
This patch just adds the new root paintable and updates the tests
expectations. The next patch will move painting logic from the layout
viewport to the paint viewport.
Until now, paint trees have been piggybacking on the layout tree for
traversal, and paintables didn't actually have their own parent/child
pointers.
This patch changes that by making Paintable inherit from TreeNode, and
adding a new pass to LayoutState::commit() where we recursively build
the new paint tree.
Using `Core::Timer` that doesn't implicitly convert callback to
`JS::SafeFunction` fixes the bug when `BrowsingContext` is never
destroyed because of cyclic dependency between callback and
`BrowsingContext`.
Callbacks registered within the SharedImageRequest can be removed after
the request has been completed. This resolves the GC memory leak issue
that occurs due to a cyclic dependency, where the callback captures the
image request while being owned by the image request at the same time.
In FetchAlgorithms, it is common for callbacks to capture realms. This
can indirectly keep objects alive that hold FetchController with these
callbacks. This creates a cyclic dependency. However, when
JS::HeapFunction is used, this is not a problem, as captured by
callbacks values do not create new roots.
This allows to partially solve the problem of cyclic dependency between
HTMLImageElement and SharedImageRequest that prevents all image
elements from being deallocated.
