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https://github.com/LadybirdBrowser/ladybird.git
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5fdcf207f8
Extract the box size computation into a new compute_box_size() that returns a plain struct with two doubles, and use it in is_active() instead of calculate_box_size() which allocates a GC-managed ResizeObserverSize object. Since is_active() only needs to compare sizes and immediately discards the result, there's no reason to involve the GC. The GC-allocating calculate_box_size() now delegates to compute_box_size() internally. This was 2.6% of CPU time while playing a YouTube video.
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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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/Bindings/PlatformObject.h>
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#include <LibWeb/Bindings/ResizeObserverPrototype.h>
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namespace Web::ResizeObserver {
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// https://drafts.csswg.org/resize-observer-1/#resizeobserversize
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class ResizeObserverSize : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(ResizeObserverSize, Bindings::PlatformObject);
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GC_DECLARE_ALLOCATOR(ResizeObserverSize);
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public:
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struct RawSize {
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double inline_size { 0 };
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double block_size { 0 };
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};
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static RawSize compute_box_size(DOM::Element& target, Bindings::ResizeObserverBoxOptions observed_box);
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static GC::Ref<ResizeObserverSize> calculate_box_size(JS::Realm& realm, DOM::Element& target, Bindings::ResizeObserverBoxOptions observed_box);
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double inline_size() const { return m_inline_size; }
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void set_inline_size(double inline_size) { m_inline_size = inline_size; }
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double block_size() const { return m_block_size; }
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void set_block_size(double block_size) { m_block_size = block_size; }
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bool equals(RawSize const& other) const;
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bool equals(ResizeObserverSize const& other) const;
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private:
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explicit ResizeObserverSize(JS::Realm& realm)
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: PlatformObject(realm)
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{
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}
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virtual void initialize(JS::Realm&) override;
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double m_inline_size { 0 };
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double m_block_size { 0 };
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};
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}
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