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Serenity Operating System
1/*
2 * Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibWeb/Bindings/CSSSupportsRulePrototype.h>
8#include <LibWeb/Bindings/Intrinsics.h>
9#include <LibWeb/CSS/CSSSupportsRule.h>
10#include <LibWeb/CSS/Parser/Parser.h>
11
12namespace Web::CSS {
13
14WebIDL::ExceptionOr<JS::NonnullGCPtr<CSSSupportsRule>> CSSSupportsRule::create(JS::Realm& realm, NonnullRefPtr<Supports>&& supports, CSSRuleList& rules)
15{
16 return MUST_OR_THROW_OOM(realm.heap().allocate<CSSSupportsRule>(realm, realm, move(supports), rules));
17}
18
19CSSSupportsRule::CSSSupportsRule(JS::Realm& realm, NonnullRefPtr<Supports>&& supports, CSSRuleList& rules)
20 : CSSConditionRule(realm, rules)
21 , m_supports(move(supports))
22{
23}
24
25JS::ThrowCompletionOr<void> CSSSupportsRule::initialize(JS::Realm& realm)
26{
27 MUST_OR_THROW_OOM(Base::initialize(realm));
28 set_prototype(&Bindings::ensure_web_prototype<Bindings::CSSSupportsRulePrototype>(realm, "CSSSupportsRule"));
29
30 return {};
31}
32
33DeprecatedString CSSSupportsRule::condition_text() const
34{
35 return m_supports->to_string().release_value_but_fixme_should_propagate_errors().to_deprecated_string();
36}
37
38void CSSSupportsRule::set_condition_text(DeprecatedString text)
39{
40 if (auto new_supports = parse_css_supports(Parser::ParsingContext { realm() }, text))
41 m_supports = new_supports.release_nonnull();
42}
43
44// https://www.w3.org/TR/cssom-1/#serialize-a-css-rule
45DeprecatedString CSSSupportsRule::serialized() const
46{
47 // Note: The spec doesn't cover this yet, so I'm roughly following the spec for the @media rule.
48 // It should be pretty close!
49
50 StringBuilder builder;
51
52 builder.append("@supports "sv);
53 builder.append(condition_text());
54 builder.append(" {\n"sv);
55 for (size_t i = 0; i < css_rules().length(); i++) {
56 auto rule = css_rules().item(i);
57 if (i != 0)
58 builder.append("\n"sv);
59 builder.append(" "sv);
60 builder.append(rule->css_text());
61 }
62 builder.append("\n}"sv);
63
64 return builder.to_deprecated_string();
65}
66
67}