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c5c1a8fcc7
This removes some ambiguity about what the return value should be if the index is out of range. Previously, we would sometimes return a JS null, and other times a JS undefined. It will also let us fold together the checks for whether an index is a supported property index, followed by getting the value just afterwards.
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/Iterator.h>
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#include <AK/RefPtr.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/CSS/CSSRule.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::CSS {
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// https://www.w3.org/TR/cssom/#the-cssrulelist-interface
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class CSSRuleList : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(CSSRuleList, Bindings::PlatformObject);
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JS_DECLARE_ALLOCATOR(CSSRuleList);
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public:
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[[nodiscard]] static JS::NonnullGCPtr<CSSRuleList> create(JS::Realm&, JS::MarkedVector<CSSRule*> const&);
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[[nodiscard]] static JS::NonnullGCPtr<CSSRuleList> create_empty(JS::Realm&);
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~CSSRuleList() = default;
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CSSRule const* item(size_t index) const
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{
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if (index >= length())
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return nullptr;
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return m_rules[index];
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}
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CSSRule* item(size_t index)
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{
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if (index >= length())
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return nullptr;
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return m_rules[index];
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}
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size_t length() const { return m_rules.size(); }
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auto begin() const { return m_rules.begin(); }
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auto begin() { return m_rules.begin(); }
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auto end() const { return m_rules.end(); }
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auto end() { return m_rules.end(); }
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virtual bool is_supported_property_index(u32 index) const override;
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virtual Optional<JS::Value> item_value(size_t index) const override;
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WebIDL::ExceptionOr<void> remove_a_css_rule(u32 index);
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WebIDL::ExceptionOr<unsigned> insert_a_css_rule(Variant<StringView, CSSRule*>, u32 index);
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void for_each_effective_style_rule(Function<void(CSSStyleRule const&)> const& callback) const;
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// Returns whether the match state of any media queries changed after evaluation.
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bool evaluate_media_queries(HTML::Window const&);
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void for_each_effective_keyframes_at_rule(Function<void(CSSKeyframesRule const&)> const& callback) const;
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void set_rules(Badge<CSSStyleSheet>, Vector<JS::NonnullGCPtr<CSSRule>> rules) { m_rules = move(rules); }
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Function<void()> on_change;
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private:
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explicit CSSRuleList(JS::Realm&);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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Vector<JS::NonnullGCPtr<CSSRule>> m_rules;
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};
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}
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