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https://github.com/LadybirdBrowser/ladybird
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500ca417ce
This requires us to front load computation of writing-mode and direction
before we encounter any logical aliases or their physical counterparts
so that we can create a mapping context.
Doing this at compute rather than cascade time achieves a few things:
1) Brings us into line with the spec
2) Avoids the double cascade that was previously required to compute
mapping contexts
3) We now compute values of logical aliases, while
`style_value_for_computed_property` maps logical aliases to their
physical counterparts, this didn't account for all cases (i.e. if
there was no layout node, Typed OM, etc).
4) Removes a hurdle to moving other upstream processes (i.e. arbitrary
substitution function resolution, custom property computation) to
compute time as the spec requires.
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
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* Copyright (c) 2024, 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/FixedBitmap.h>
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#include <LibGC/CellAllocator.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibWeb/CSS/CascadeOrigin.h>
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#include <LibWeb/CSS/PropertyID.h>
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#include <LibWeb/CSS/Selector.h>
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#include <LibWeb/CSS/StyleProperty.h>
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#include <LibWeb/CSS/StyleValues/StyleValue.h>
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namespace Web::CSS {
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class CascadedProperties final : public JS::Cell {
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GC_CELL(CascadedProperties, JS::Cell);
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GC_DECLARE_ALLOCATOR(CascadedProperties);
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public:
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virtual ~CascadedProperties() override;
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[[nodiscard]] RefPtr<StyleValue const> property(PropertyID) const;
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[[nodiscard]] PropertyID property_with_higher_priority(PropertyID, PropertyID) const;
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[[nodiscard]] GC::Ptr<CSSStyleDeclaration const> property_source(PropertyID) const;
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[[nodiscard]] Optional<StyleProperty> style_property(PropertyID) const;
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void set_property(PropertyID, NonnullRefPtr<StyleValue const>, Important, CascadeOrigin, Optional<FlyString> layer_name, GC::Ptr<CSS::CSSStyleDeclaration const> source);
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void set_property_from_presentational_hint(PropertyID, NonnullRefPtr<StyleValue const>);
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void revert_property(PropertyID, Important, CascadeOrigin);
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void revert_layer_property(PropertyID, Important, Optional<FlyString> layer_name);
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void resolve_unresolved_properties(DOM::AbstractElement);
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private:
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CascadedProperties();
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virtual void visit_edges(Visitor&) override;
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struct Entry {
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StyleProperty property;
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size_t cascade_index { 0 };
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CascadeOrigin origin;
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Optional<FlyString> layer_name;
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GC::Ptr<CSS::CSSStyleDeclaration const> source;
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};
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HashMap<PropertyID, Vector<Entry>> m_properties;
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size_t m_next_cascade_index { 0 };
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AK::FixedBitmap<to_underlying(last_longhand_property_id) + 1> m_contained_properties_cache { false };
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};
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}
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