707ca984bd
Before this change, whenever ImageStyleValue had a non-null `m_image_request`, it was always leaked along with everything related to the document to which this value belongs. The issue arises due to the use of `JS::Handle` for the image request, as it introduces a cyclic dependency where `ImageRequest` prevents the `CSSStyleSheet`, that owns `ImageStyleValue`, from being deallocated: - ImageRequest - FetchController - FetchParams - Window - HTMLDocument - HTMLHtmlElement - HTMLBodyElement - Text - HTMLHeadElement - Text - HTMLMetaElement - Text - HTMLTitleElement - Text - HTMLStyleElement - CSSStyleSheet This change solves this by visiting `m_image_request` from `visit_edges` instead of introducing new heap root by using `JS::Handle`.
122 lines
4.8 KiB
C++
122 lines
4.8 KiB
C++
/*
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* Copyright (c) 2018-2023, 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 <AK/DeprecatedString.h>
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#include <AK/Vector.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/CSS/StyleProperty.h>
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#include <LibWeb/CSS/StyleValue.h>
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namespace Web::CSS {
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class CSSStyleDeclaration : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(CSSStyleDeclaration, Bindings::PlatformObject);
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public:
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virtual ~CSSStyleDeclaration() = default;
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virtual void initialize(JS::Realm&) override;
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virtual size_t length() const = 0;
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virtual String item(size_t index) const = 0;
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virtual Optional<StyleProperty> property(PropertyID) const = 0;
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virtual WebIDL::ExceptionOr<void> set_property(PropertyID, StringView css_text, StringView priority = ""sv) = 0;
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virtual WebIDL::ExceptionOr<String> remove_property(PropertyID) = 0;
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WebIDL::ExceptionOr<void> set_property(StringView property_name, StringView css_text, StringView priority);
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WebIDL::ExceptionOr<String> remove_property(StringView property_name);
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String get_property_value(StringView property) const;
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StringView get_property_priority(StringView property) const;
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DeprecatedString css_text() const;
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virtual WebIDL::ExceptionOr<void> set_css_text(StringView) = 0;
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virtual DeprecatedString serialized() const = 0;
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virtual JS::ThrowCompletionOr<bool> internal_has_property(JS::PropertyKey const& name) const override;
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virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*) const override;
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virtual JS::ThrowCompletionOr<bool> internal_set(JS::PropertyKey const&, JS::Value value, JS::Value receiver) override;
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protected:
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explicit CSSStyleDeclaration(JS::Realm&);
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};
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class PropertyOwningCSSStyleDeclaration : public CSSStyleDeclaration {
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WEB_PLATFORM_OBJECT(PropertyOwningCSSStyleDeclaration, CSSStyleDeclaration);
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friend class ElementInlineCSSStyleDeclaration;
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public:
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[[nodiscard]] static JS::NonnullGCPtr<PropertyOwningCSSStyleDeclaration>
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create(JS::Realm&, Vector<StyleProperty>, HashMap<DeprecatedString, StyleProperty> custom_properties);
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virtual ~PropertyOwningCSSStyleDeclaration() override = default;
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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 WebIDL::ExceptionOr<void> set_property(PropertyID, StringView css_text, StringView priority) override;
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virtual WebIDL::ExceptionOr<String> remove_property(PropertyID) override;
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Vector<StyleProperty> const& properties() const { return m_properties; }
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HashMap<DeprecatedString, StyleProperty> const& custom_properties() const { return m_custom_properties; }
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Optional<StyleProperty> custom_property(DeprecatedString const& custom_property_name) const { return m_custom_properties.get(custom_property_name); }
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size_t custom_property_count() const { return m_custom_properties.size(); }
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virtual DeprecatedString serialized() const final override;
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virtual WebIDL::ExceptionOr<void> set_css_text(StringView) override;
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protected:
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PropertyOwningCSSStyleDeclaration(JS::Realm&, Vector<StyleProperty>, HashMap<DeprecatedString, StyleProperty>);
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virtual void update_style_attribute() { }
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void empty_the_declarations();
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void set_the_declarations(Vector<StyleProperty> properties, HashMap<DeprecatedString, StyleProperty> custom_properties);
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private:
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bool set_a_css_declaration(PropertyID, NonnullRefPtr<StyleValue const>, Important);
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virtual void visit_edges(Cell::Visitor&) override;
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Vector<StyleProperty> m_properties;
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HashMap<DeprecatedString, StyleProperty> m_custom_properties;
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};
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class ElementInlineCSSStyleDeclaration final : public PropertyOwningCSSStyleDeclaration {
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WEB_PLATFORM_OBJECT(ElementInlineCSSStyleDeclaration, PropertyOwningCSSStyleDeclaration);
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public:
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[[nodiscard]] static JS::NonnullGCPtr<ElementInlineCSSStyleDeclaration> create(DOM::Element&, Vector<StyleProperty>, HashMap<DeprecatedString, StyleProperty> custom_properties);
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virtual ~ElementInlineCSSStyleDeclaration() override = default;
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DOM::Element* element() { return m_element.ptr(); }
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const DOM::Element* element() const { return m_element.ptr(); }
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bool is_updating() const { return m_updating; }
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virtual WebIDL::ExceptionOr<void> set_css_text(StringView) override;
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private:
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ElementInlineCSSStyleDeclaration(DOM::Element&, Vector<StyleProperty> properties, HashMap<DeprecatedString, StyleProperty> custom_properties);
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virtual void visit_edges(Cell::Visitor&) override;
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virtual void update_style_attribute() override;
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JS::GCPtr<DOM::Element> m_element;
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// https://drafts.csswg.org/cssom/#cssstyledeclaration-updating-flag
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bool m_updating { false };
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};
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}
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