Note: non-inherited properties are stored in "reset" style structs.
Previous implementation treats it as an inherited property, which
doesn't match the spec.
This also fixes the incorrect behavior when using the `unset` value
for this property by specifying SETVAL_UNSET_INITIAL in the mask.
This removes the requirement for there to be a non-null PresShell to
dispatch `Click()` events on `<A>` elements (only), since the exception
to the rule has propagated to the spec.
With these changes it should now be possible do create an anchor and
`Click()` on it from JS without actually first attaching it to the DOM
of the presented document, as abused by scripted downloads in pages
(instead of using the A attribute to custom-name downloads).
Relying on the implicit conversion by `::FromContent` doesn't work for
us because we inherit that from `nsGenericHTMLElement` and isn't specific
to `HTMLAreaElement`, so it would accept other elements.
This also updates the Attribute changed event handler to exclude `<a>`
elements and cleans up an unused variable from the old code.
This was part of the HTML4 standard but only ever implemented by Mozilla
and removed again in HTML5 due to lack of adoption. Retaining this could
cause web compat issues and unspecified behavior in the layout engine.
A grid item spanning multiple grid rows/columns which include a flexible
track should not participate in the auto min-sizing calculation.
Resolves#2688
This removes a lot of the plumbing for having the platform embed itself
through IPC which was required for B2G running the browser as both
shell and browser application.
We null-initialize all of the other pointer members in NewPerSpanData; we should
do the same for these ones, for consistency & robustness.
(In practice, the callers end up initializing these members before reading them
anyway, so it's been benign that we weren't initializing them. But better for
safety & futureproofing to have them reliably initialized.)
Fullscreen stack isn't part of the spec anymore; it's been changed to a more
generic version called Top Layer stack, which is being used by both full-screen
APIs and dialog elements.
This patch refactors it to Top Layer stack so that it can be reused for dialog
elements.
Top Layer stack spec: https://fullscreen.spec.whatwg.org/#new-stacking-layer
Vim control lines were re-introduced or not entirely cleaned up.
This nukes them again.
Removing from embedding, extensions, gfx, hal, ipc, layout, mailnews,
media and memory. More to come.
It turns out part 10 was actually needed, but Bug 1449838 had a significantly
better version of what that code does that was easy enough to backport to what
we have. As far as I can tell, this passes the relevant reftests now.
My previous fix apparently only worked with GCC 7. Having that return at the
end doesn't seem to hurt anything on Windows, so I see no reason to ifdef it.
I don't remember where I heard this, but I vaguely remember hearing that
ending a function without a return statement may be undefined behavior that
differs between compilers and operating systems. If so, that would explain why
this has behaved so differently across platforms and compilers.
