d935a00413
Through the CSSOM, rules can be moved around, and so anything cached (for now just the qualified layer name) needs to be recalculated when that happens. This method is virtual so that other rules will be able to clear their cached data too.
80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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* Copyright (c) 2022, Andreas Kling <andreas@ladybird.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/String.h>
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#include <LibJS/Heap/GCPtr.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/CSS/CSSStyleDeclaration.h>
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#include <LibWeb/CSS/Selector.h>
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namespace Web::CSS {
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class CSSRule : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(CSSRule, Bindings::PlatformObject);
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public:
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virtual ~CSSRule() = default;
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// https://drafts.csswg.org/cssom/#dom-cssrule-type
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enum class Type : u16 {
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Style = 1,
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Import = 3,
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Media = 4,
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FontFace = 5,
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Keyframes = 7,
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Keyframe = 8,
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Namespace = 10,
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Supports = 12,
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// AD-HOC: These are not included in the spec, but we need them internally. So, their numbers are arbitrary.
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LayerBlock = 100,
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LayerStatement = 101,
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NestedDeclarations = 102,
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};
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virtual Type type() const = 0;
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String css_text() const;
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void set_css_text(StringView);
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CSSRule* parent_rule() { return m_parent_rule.ptr(); }
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CSSRule const* parent_rule() const { return m_parent_rule.ptr(); }
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void set_parent_rule(CSSRule*);
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CSSStyleSheet* parent_style_sheet() { return m_parent_style_sheet.ptr(); }
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virtual void set_parent_style_sheet(CSSStyleSheet*);
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template<typename T>
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bool fast_is() const = delete;
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// https://drafts.csswg.org/cssom-1/#serialize-a-css-rule
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virtual String serialized() const = 0;
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protected:
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explicit CSSRule(JS::Realm&);
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virtual void visit_edges(Cell::Visitor&) override;
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virtual void clear_caches();
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[[nodiscard]] FlyString const& parent_layer_internal_qualified_name() const
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{
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if (!m_cached_layer_name.has_value())
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return parent_layer_internal_qualified_name_slow_case();
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return m_cached_layer_name.value();
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}
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[[nodiscard]] FlyString const& parent_layer_internal_qualified_name_slow_case() const;
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JS::GCPtr<CSSRule> m_parent_rule;
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JS::GCPtr<CSSStyleSheet> m_parent_style_sheet;
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mutable Optional<FlyString> m_cached_layer_name;
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};
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}
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