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Add support for -moz-top-layer

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This commit is contained in:
Xidorn Quan 2017-01-05 22:03:25 +11:00
parent 143dfc879e
commit aa33dfff05
1 changed files with 47 additions and 7 deletions
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54
components/style/properties/longhand/box.mako.rs
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@ -94,9 +94,52 @@
</%helpers:longhand>
${helpers.single_keyword("position", "static absolute relative fixed",
need_clone=True, extra_gecko_values="sticky", animatable=False,
spec="https://drafts.csswg.org/css-position/#position-property")}
${helpers.single_keyword("-moz-top-layer", "none top",
gecko_constant_prefix="NS_STYLE_TOP_LAYER",
gecko_ffi_name="mTopLayer", need_clone=True,
products="gecko", animatable=False, internal=True,
spec="Internal (not web-exposed)")}
<%helpers:single_keyword_computed name="position"
values="static absolute relative fixed"
need_clone="True"
extra_gecko_values="sticky"
animatable="False"
spec="https://drafts.csswg.org/css-position/#position-property">
impl SpecifiedValue {
pub fn is_absolutely_positioned_style(&self) -> bool {
matches!(*self, SpecifiedValue::absolute | SpecifiedValue::fixed)
}
}
use values::NoViewportPercentage;
impl NoViewportPercentage for SpecifiedValue {}
impl ToComputedValue for SpecifiedValue {
type ComputedValue = computed_value::T;
#[inline]
fn to_computed_value(&self, _context: &Context) -> computed_value::T {
% if product == "gecko":
// https://fullscreen.spec.whatwg.org/#new-stacking-layer
// Any position value other than 'absolute' and 'fixed' are
// computed to 'absolute' if the element is in a top layer.
if !self.is_absolutely_positioned_style() &&
matches!(_context.style().get_box().clone__moz_top_layer(),
longhands::_moz_top_layer::SpecifiedValue::top) {
SpecifiedValue::absolute
} else {
*self
}
% else:
*self
% endif
}
#[inline]
fn from_computed_value(computed: &computed_value::T) -> SpecifiedValue {
*computed
}
}
</%helpers:single_keyword_computed>
<%helpers:single_keyword_computed name="float"
values="none left right"
@ -115,10 +158,7 @@ ${helpers.single_keyword("position", "static absolute relative fixed",
#[inline]
fn to_computed_value(&self, context: &Context) -> computed_value::T {
let positioned = matches!(context.style().get_box().clone_position(),
longhands::position::SpecifiedValue::absolute |
longhands::position::SpecifiedValue::fixed);
if positioned {
if context.style().get_box().clone_position().is_absolutely_positioned_style() {
computed_value::T::none
} else {
let ltr = context.style().writing_mode.is_bidi_ltr();