5faca4f027
This is an ad-hoc implementation that resolves the ready() promise once the document and all fonts collected by the style computer are done loading. A spec-compliant implementation would include creating a proxy CSS::FontFace for each @font-face and correctly implementing the specification steps for font fetching, but we are far from there yet. This hackish implementation should yield good WPT progress because it will actually start waiting for the Ahem font to load before capturing layout measurements. For example, it makes https://wpt.live/css/css-grid/abspos/positioned-grid-descendants-001.html go from 0/100 to 36/100 passing subtests.
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*
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* Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
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* Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.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 <LibJS/Runtime/Set.h>
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#include <LibJS/Runtime/SetIterator.h>
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#include <LibWeb/Bindings/FontFaceSetPrototype.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/CSS/FontFace.h>
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#include <LibWeb/DOM/EventTarget.h>
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namespace Web::CSS {
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class FontFaceSet final : public DOM::EventTarget {
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WEB_PLATFORM_OBJECT(FontFaceSet, DOM::EventTarget);
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JS_DECLARE_ALLOCATOR(FontFaceSet);
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public:
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[[nodiscard]] static JS::NonnullGCPtr<FontFaceSet> construct_impl(JS::Realm&, Vector<JS::Handle<FontFace>> const& initial_faces);
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[[nodiscard]] static JS::NonnullGCPtr<FontFaceSet> create(JS::Realm&);
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virtual ~FontFaceSet() override = default;
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JS::NonnullGCPtr<JS::Set> set_entries() const { return m_set_entries; }
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WebIDL::ExceptionOr<JS::NonnullGCPtr<FontFaceSet>> add(JS::Handle<FontFace>);
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bool delete_(JS::Handle<FontFace>);
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void clear();
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void set_onloading(WebIDL::CallbackType*);
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WebIDL::CallbackType* onloading();
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void set_onloadingdone(WebIDL::CallbackType*);
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WebIDL::CallbackType* onloadingdone();
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void set_onloadingerror(WebIDL::CallbackType*);
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WebIDL::CallbackType* onloadingerror();
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JS::ThrowCompletionOr<JS::NonnullGCPtr<JS::Promise>> load(String const& font, String const& text);
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JS::NonnullGCPtr<JS::Promise> ready() const;
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Bindings::FontFaceSetLoadStatus status() const { return m_status; }
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void resolve_ready_promise();
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private:
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FontFaceSet(JS::Realm&, JS::NonnullGCPtr<WebIDL::Promise> ready_promise, JS::NonnullGCPtr<JS::Set> set_entries);
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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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JS::NonnullGCPtr<JS::Set> m_set_entries;
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JS::GCPtr<WebIDL::Promise> m_ready_promise; // [[ReadyPromise]]
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Vector<JS::NonnullGCPtr<FontFace>> m_loading_fonts {}; // [[LoadingFonts]]
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Vector<JS::NonnullGCPtr<FontFace>> m_loaded_fonts {}; // [[LoadedFonts]]
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Vector<JS::NonnullGCPtr<FontFace>> m_failed_fonts {}; // [[FailedFonts]]
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Bindings::FontFaceSetLoadStatus m_status { Bindings::FontFaceSetLoadStatus::Loading };
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};
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}
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