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82bd3d3891
Prevents observably calling Trusted Types, which can run arbitrary JS, cause crashes due to use of MUST and allow arbitrary JS to modify internal elements.
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2024, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2023-2025, Sam Atkins <sam@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/CSSStyleDeclarationPrototype.h>
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#include <LibWeb/Bindings/ExceptionOrUtils.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/CSS/CSSStyleDeclaration.h>
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#include <LibWeb/CSS/StyleComputer.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Element.h>
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namespace Web::CSS {
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GC_DEFINE_ALLOCATOR(CSSStyleDeclaration);
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CSSStyleDeclaration::CSSStyleDeclaration(JS::Realm& realm, Computed computed, Readonly readonly)
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: PlatformObject(realm)
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, m_computed(computed == Computed::Yes)
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, m_readonly(readonly == Readonly::Yes)
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{
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m_legacy_platform_object_flags = LegacyPlatformObjectFlags {
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.supports_indexed_properties = true,
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};
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}
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void CSSStyleDeclaration::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSStyleDeclaration);
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Base::initialize(realm);
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}
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// https://drafts.csswg.org/cssom/#update-style-attribute-for
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void CSSStyleDeclaration::update_style_attribute()
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{
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// 1. Assert: declaration block’s computed flag is unset.
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VERIFY(!is_computed());
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// 2. Let owner node be declaration block’s owner node.
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// 3. If owner node is null, then return.
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if (!owner_node().has_value())
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return;
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// 4. Set declaration block’s updating flag.
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set_is_updating(true);
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// 5. Set an attribute value for owner node using "style" and the result of serializing declaration block.
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owner_node()->element().set_attribute_value(HTML::AttributeNames::style, serialized());
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// 6. Unset declaration block’s updating flag.
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set_is_updating(false);
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}
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// https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-csstext
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String CSSStyleDeclaration::css_text() const
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{
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// 1. If the computed flag is set, then return the empty string.
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if (is_computed())
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return {};
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// 2. Return the result of serializing the declarations.
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return serialized();
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}
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Optional<JS::Value> CSSStyleDeclaration::item_value(size_t index) const
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{
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auto value = item(index);
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if (value.is_empty())
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return {};
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return JS::PrimitiveString::create(vm(), value);
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}
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void CSSStyleDeclaration::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_parent_rule);
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if (m_owner_node.has_value())
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m_owner_node->visit(visitor);
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}
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}
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