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fa9c463ffd
Instead of indiscriminately clearing the cache for all anonymous boxes, we now only clear it for those that were generated by a non-anonymous box in need of layout update. This increases the cache hit rate and allows us to avoid more work.
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.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/DOM/Document.h>
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#include <LibWeb/HTML/HTMLHtmlElement.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/FormattingContext.h>
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#include <LibWeb/Layout/TableWrapper.h>
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#include <LibWeb/Painting/PaintableBox.h>
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namespace Web::Layout {
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Box::Box(DOM::Document& document, DOM::Node* node, GC::Ref<CSS::ComputedProperties> style)
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: NodeWithStyleAndBoxModelMetrics(document, node, move(style))
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{
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}
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Box::Box(DOM::Document& document, DOM::Node* node, NonnullOwnPtr<CSS::ComputedValues> computed_values)
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: NodeWithStyleAndBoxModelMetrics(document, node, move(computed_values))
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{
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}
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Box::~Box()
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{
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}
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Optional<CSSPixels> Box::natural_width() const
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{
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// https://drafts.csswg.org/css-contain-2/#containment-size
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// Replaced elements must be treated as having a natural width and height of 0 and no natural aspect
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// ratio.
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if (m_has_size_containment)
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return 0;
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return m_natural_width;
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}
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Optional<CSSPixels> Box::natural_height() const
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{
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// https://drafts.csswg.org/css-contain-2/#containment-size
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// Replaced elements must be treated as having a natural width and height of 0 and no natural aspect
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// ratio.
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if (m_has_size_containment)
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return 0;
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return m_natural_height;
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}
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Optional<CSSPixelFraction> Box::natural_aspect_ratio() const
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{
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// https://drafts.csswg.org/css-contain-2/#containment-size
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// Replaced elements must be treated as having a natural width and height of 0 and no natural aspect
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// ratio.
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if (m_has_size_containment)
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return {};
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return m_natural_aspect_ratio;
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}
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void Box::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_contained_abspos_children);
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}
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GC::Ptr<Painting::Paintable> Box::create_paintable() const
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{
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return Painting::PaintableBox::create(*this);
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}
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Painting::PaintableBox* Box::paintable_box()
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{
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return static_cast<Painting::PaintableBox*>(Node::first_paintable());
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}
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Painting::PaintableBox const* Box::paintable_box() const
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{
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return static_cast<Painting::PaintableBox const*>(Node::first_paintable());
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}
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Optional<CSSPixelFraction> Box::preferred_aspect_ratio() const
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{
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auto computed_aspect_ratio = computed_values().aspect_ratio();
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if (computed_aspect_ratio.use_natural_aspect_ratio_if_available && natural_aspect_ratio().has_value())
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return natural_aspect_ratio();
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if (!computed_aspect_ratio.preferred_ratio.has_value())
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return {};
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auto ratio = computed_aspect_ratio.preferred_ratio.release_value();
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if (ratio.is_degenerate())
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return {};
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return CSSPixelFraction(ratio.numerator(), ratio.denominator());
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}
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}
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