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https://github.com/LadybirdBrowser/ladybird.git
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873680a504
Previously, `<link rel=stylesheet>` would delay the load event until its style sheet loaded, but not care about its subresources. `<style>` would not delay the load event at all. Instead, each `@import` would delay the load event. Now, both `<style>` and `<link>` delay the load event until their style sheet and its critical subresources have loaded or failed. This means that CSSImportRules no longer need to delay the load event themselves, because they do so implicitly as a critical subresource of their parent style sheet. This doesn't directly affect behavior, but means that any other critical style resources we add will automatically delay the load event. One wrinkle here is that the spec for the `<link>` element requires that we wait for the style sheet's critical subresources *before* we create a CSSStyleSheet, which means we don't yet know what those are. https://html.spec.whatwg.org/multipage/semantics.html#fetching-and-processing-a-resource-from-a-link-element:critical-subresources For now we simply ignore this, as we did before. That means we continue to not delay the `<link>`'s load event.
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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* Copyright (c) 2021-2026, Sam Atkins <sam@ladybird.org>
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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 <LibWeb/CSS/CSSRule.h>
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#include <LibWeb/CSS/CSSStyleSheet.h>
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#include <LibWeb/CSS/URL.h>
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#include <LibWeb/Export.h>
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#include <LibWeb/Forward.h>
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namespace Web::CSS {
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class WEB_API CSSImportRule final
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: public CSSRule
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, public CSSStyleSheet::Subresource {
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WEB_PLATFORM_OBJECT(CSSImportRule, CSSRule);
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GC_DECLARE_ALLOCATOR(CSSImportRule);
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public:
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[[nodiscard]] static GC::Ref<CSSImportRule> create(JS::Realm&, URL, GC::Ptr<DOM::Document>, Optional<FlyString> layer, RefPtr<Supports>, GC::Ref<MediaList>);
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virtual ~CSSImportRule() override;
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URL const& url() const { return m_url; }
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String href() const { return m_url.url(); }
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CSSStyleSheet* loaded_style_sheet() { return m_style_sheet; }
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CSSStyleSheet const* loaded_style_sheet() const { return m_style_sheet; }
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GC::Ref<MediaList> media() const;
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CSSStyleSheet* style_sheet_for_bindings() { return m_style_sheet; }
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Optional<FlyString> layer_name() const;
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Optional<String> supports_text() const;
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bool matches() const;
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Optional<FlyString> internal_layer_name() const { return m_layer_internal; }
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Optional<FlyString> internal_qualified_layer_name(Badge<StyleScope>) const;
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private:
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CSSImportRule(JS::Realm&, URL, GC::Ptr<DOM::Document>, Optional<FlyString>, RefPtr<Supports>, GC::Ref<MediaList>);
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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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virtual void dump(StringBuilder&, int indent_levels) const override;
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virtual void set_parent_style_sheet(CSSStyleSheet*) override;
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virtual GC::Ptr<CSSStyleSheet> parent_style_sheet_for_subresource() override { return m_parent_style_sheet; }
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virtual String serialized() const override;
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void fetch();
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void set_style_sheet(GC::Ref<CSSStyleSheet>);
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URL m_url;
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GC::Ptr<DOM::Document> m_document;
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Optional<FlyString> m_layer;
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Optional<FlyString> m_layer_internal;
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RefPtr<Supports> m_supports;
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GC::Ref<MediaList> m_media;
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GC::Ptr<CSSStyleSheet> m_style_sheet;
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};
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template<>
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inline bool CSSRule::fast_is<CSSImportRule>() const { return type() == CSSRule::Type::Import; }
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}
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