(Path is actually r=froydnj.)
Bug 1400459 devirtualized nsIAtom so that it is no longer a subclass of
nsISupports. This means that nsAtom is now a better name for it than nsIAtom.
MozReview-Commit-ID: 91U22X2NydP
Using SVG SMIL it is possible to animate the class attribute of an element using
markup such as the following:
<style>
.red {
fill: red;
}
</style>
<svg>
<circle cx="50" cy="50" r="30" fill="blue">
<set attributeName="class" to="red" begin="1s"/>
</circle>
</svg>
In Gecko, Element::GetClasses handles this case by looking for an animated class
string when the element in question is an SVG element.
This patch causes our Servo bindings to use GetClasses when querying attribute
values for selector matching.
Note that animating the class attribute is *not* expected to affect attribute
selectors such as `circle[class="red"]`. It does in Chrome, but that is due to
a Blink bug where animating attributes using SMIL affects the result of
getAttribute:
https://bugs.chromium.org/p/chromium/issues/detail?id=735820
This patch adjusts the behavior for both the GeckoElement case and the
ServoElementSnapshot case.
MozReview-Commit-ID: DAFWHSH1aYB
If the mathml.disabled preference is true, treat <math> and other MathML
elements as generic XML elements.
This patch disables the rendering code of MathML however preserves the
namespace so to reduce the breakage.
Original patch by: Kathy Brade <brade@pearlcrescent.com>
MozReview-Commit-ID: A2f2Q2b4eqR
