The way the copy-on-write stuff works, and the way that we have to apply
properties from most specific to less specific guarantees that always that we're
going to inherit an inherited property, or reset a reset property, we have
already the right value on the style.
Revert relies on that, so there doesn't seem to be a reason to not use that fact
more often and skip useless work earlier.
Font-size is still special of course... I think I have a way to move the
specialness outside of the style, but piece by piece.
Differential Revision: https://phabricator.services.mozilla.com/D21882
The only fishy bit is the animation stuff. In particular, there are two places
where we just mint the revert behavior:
* When serializing web-animations keyframes (the custom properties stuff in
declaration_block.rs). That codepath is already not sound and I wanted to
get rid of it in bug 1501530, but what do I know.
* When getting an animation value from a property declaration. At that point
we no longer have the CSS rules that apply to the element to compute the
right revert value handy. It'd also use the wrong style anyway, I think,
given the way StyleBuilder::for_animation works.
We _could_ probably get them out of somewhere, but it seems like a whole lot
of code reinventing the wheel which is probably not useful, and that Blink
and WebKit just cannot implement either since they don't have a rule tree,
so it just doesn't seem worth the churn.
The custom properties code looks a bit different in order to minimize hash
lookups in the common case. FWIW, `revert` for custom properties doesn't seem
very useful either, but oh well.
Differential Revision: https://phabricator.services.mozilla.com/D21877
We can get back the fancy flag syntax as soon as we get C++17 inline variables,
which I sent an email to dev-platform@ about, with no reply.
Differential Revision: https://phabricator.services.mozilla.com/D22382
I feel a bit weird for using LenghtPercentageOrAuto to implement LengthOrAuto,
but I don't think much other code will use it so it seemed a bit better to me.
Differential Revision: https://phabricator.services.mozilla.com/D21863
We really only have two sets of prefs, one for chrome-like documents
(stuff in chrome docshells + chrome-origin images), and one for the rest.
Differential Revision: https://phabricator.services.mozilla.com/D20946
This also adopts the resolution from [1] while at it, making letter-spacing
compute to a length, serializing 0 to normal rather than keeping normal in the
computed value, which matches every other engine.
This removes the SMIL tests for percentages from letter-spacing since
letter-spacing does in fact not support percentages, so they were passing just
by chance.
[1]: https://github.com/w3c/csswg-drafts/issues/1484
Differential Revision: https://phabricator.services.mozilla.com/D21850
This may or may not be part of the plan to get rid of nsCSSValue ;)
Option is not usable via FFI, and they should not be needed (we should be
following the shortest serialization principle instead). These patches also do
that, which matches the other transform properties. I think that slight change
is fine, if we can make it work, and consistent with other properties.
Alternative is adding more TransformOperation variants or such, which I rather
not do.
Differential Revision: https://phabricator.services.mozilla.com/D21862
Otherwise, deriving ToComputedValue and ToAnimatedValue in structs or enums with
other where clauses just doesn't work.
Differential Revision: https://phabricator.services.mozilla.com/D21859
As it turns out we need this to avoid losing precision both during painting and
during serialization.
This patch also changes to serialize `context-value` if it's the computed value.
I could keep the previous behavior, but it makes no sense to serialize the
initial value. We're the only ones to support this value anyway, and I couldn't
find a definition or spec for this.
Also update tests and expectations for:
* New unexpected passes.
* Always serializing the unit in getComputedStyle.
* Calc and interpolation support.
Chrome also always serializes the unit in getComputedStyle, so I'm pretty sure
this is compatible with them. Chrome is inconsistent and keeps numbers in
specified style, but that's inconsistent with itself and with other quirky
lengths, so I updated the tests instead.
Differential Revision: https://phabricator.services.mozilla.com/D21819
Instead of storing them as LengthPercentage | Number, always store as
LengthPercentage, and use the unitless length quirk to parse numbers instead.
Further cleanups to use the rust representation can happen as a followup, which
will also get rid of the boolean argument (since we can poke at the rust length
itself). That's why I didn't bother to convert it to an enum class yet.
Differential Revision: https://phabricator.services.mozilla.com/D21804
Otherwise the Trait for clamping negative animation value isn't generated thus
negative animating results are exposed in computed values.
Differential Revision: https://phabricator.services.mozilla.com/D21153
The euclid size is not really used for anything. Also rename it to Size2D to
avoid cbindgen conflicts with values::length::Size.
Differential Revision: https://phabricator.services.mozilla.com/D20959
Remove pipeline visibility checks
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- Remove ```is_visible``` field from ```Pipeline``` struct
- Remove ```SetVisible``` script message, and related message sending/handling.
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Implement WebDriver FindElementFromElement command
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In BC event-loop, only run tasks related to fully-active documents
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Simplify VideoTrackList::set_selected
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Make blank target imply noopener, implement "opener" link type
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Remove an unnecessary synchronous full reflow.
We already reflow any nodes that are dirtied during any turn of the event loop. There is no reason to synchronously reflow the entire document, especially when we don't even modify it in this method.
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Make webgl behave better with session history
This prevents the compositor from animating pages that are not actually visible, so pages using webgl do not needlessly impact the performance of the rest of the browser. Additionally, this fixes a problem that was alluded to in [this code](b5228c098b/src/draw_buffer.rs (L282-L285)), causing Servo to delete arbitrary resources when a GC occurred in content that used three.js.
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Fix replacement logic when navigating nested browsing contexts
These changes also fix a bug where traversing the session history in a nested browsing context did not update the iframe's contentWindow appropriately.
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