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https://github.com/RGBCube/serenity
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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`.
69 lines
2 KiB
C++
69 lines
2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
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* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
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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/URL.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/Heap/Handle.h>
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#include <LibWeb/CSS/Enums.h>
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#include <LibWeb/CSS/StyleValues/AbstractImageStyleValue.h>
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#include <LibWeb/HTML/SharedImageRequest.h>
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namespace Web::CSS {
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class ImageStyleValue final
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: public AbstractImageStyleValue
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, public Weakable<ImageStyleValue> {
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public:
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static ValueComparingNonnullRefPtr<ImageStyleValue> create(AK::URL const& url)
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{
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return adopt_ref(*new (nothrow) ImageStyleValue(url));
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}
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virtual ~ImageStyleValue() override = default;
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void visit_edges(JS::Cell::Visitor& visitor) const
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{
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// FIXME: visit_edges in non-GC allocated classes is confusing pattern.
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// Consider making StyleValue to be GC allocated instead.
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visitor.visit(m_image_request);
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}
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virtual String to_string() const override;
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virtual bool equals(StyleValue const& other) const override;
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virtual void load_any_resources(DOM::Document&) override;
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Optional<CSSPixels> natural_width() const override;
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Optional<CSSPixels> natural_height() const override;
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virtual bool is_paintable() const override;
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void paint(PaintContext& context, DevicePixelRect const& dest_rect, CSS::ImageRendering image_rendering) const override;
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Function<void()> on_animate;
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RefPtr<HTML::DecodedImageData const> image_data() const;
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private:
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ImageStyleValue(AK::URL const&);
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JS::GCPtr<HTML::SharedImageRequest> m_image_request;
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void animate();
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Gfx::Bitmap const* bitmap(size_t frame_index, Gfx::IntSize = {}) const;
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AK::URL m_url;
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WeakPtr<DOM::Document> m_document;
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size_t m_current_frame_index { 0 };
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size_t m_loops_completed { 0 };
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RefPtr<Platform::Timer> m_timer;
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};
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}
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