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LibWeb: Implement @supports selector(.foo)
This is defined in https://www.w3.org/TR/css-conditional-4/#at-supports-ext which just became a CR. :^)
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4 changed files with 93 additions and 9 deletions
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -50,10 +50,27 @@ bool Supports::InParens::evaluate() const
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});
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}
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bool Supports::Feature::evaluate() const
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bool Supports::Declaration::evaluate() const
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{
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auto style_property = Parser({}, declaration).parse_as_declaration();
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return style_property.has_value();
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}
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bool Supports::Selector::evaluate() const
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{
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auto style_property = Parser({}, selector).parse_as_selector();
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return style_property.has_value();
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}
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bool Supports::Feature::evaluate() const
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{
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return value.visit(
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[&](Declaration const& declaration) {
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return declaration.evaluate();
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},
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[&](Selector const& selector) {
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return selector.evaluate();
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});
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}
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}
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