8b27bc078c
getComputedStyle(element) now returns a ComputedCSSStyleDeclaration object, which is a live view of the computed style of a given element. This works by ComputedCSSStyleDeclaration being a wrapper around an element pointer. When you ask it for a CSS property, it gets the latest computed style values from the element and returns them as a CSS::StyleProperty object. This first cut adds support for computed 'color' and 'display'. In case the element doesn't have a corresponding node in the layout tree, we fall back to using specified style instead. This is achieved by performing an on-the-fly style resolution for the individual element and then grabbing the requested property from that resolved style.
33 lines
853 B
C++
33 lines
853 B
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@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 <LibWeb/CSS/CSSStyleDeclaration.h>
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namespace Web::CSS {
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class ComputedCSSStyleDeclaration final : public CSSStyleDeclaration {
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public:
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static NonnullRefPtr<ComputedCSSStyleDeclaration> create(DOM::Element& element)
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{
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return adopt_ref(*new ComputedCSSStyleDeclaration(element));
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}
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virtual ~ComputedCSSStyleDeclaration() override;
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virtual size_t length() const override;
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virtual String item(size_t index) const override;
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virtual Optional<StyleProperty> property(PropertyID) const override;
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virtual bool set_property(PropertyID, StringView css_text) override;
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private:
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explicit ComputedCSSStyleDeclaration(DOM::Element&);
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NonnullRefPtr<DOM::Element> m_element;
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};
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}
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