7c06c3fd14
Move ComputedProperties and CascadedProperties out of the GC. They no longer contain strong references to GC-managed data. Keep computed styles alive from DOM elements and animation updates with RefPtr. Pass style into layout constructors by reference, since layout only copies the values it needs while building nodes. Use GC::Weak for cascade source links, so entries no longer keep the style declaration or shadow root alive.
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018-2022, Andreas Kling <andreas@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/HTML/BrowsingContext.h>
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#include <LibWeb/HTML/DecodedImageData.h>
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Layout/ImageProvider.h>
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#include <LibWeb/Painting/ImagePaintable.h>
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#include <LibWeb/Platform/FontPlugin.h>
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namespace Web::Layout {
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GC_DEFINE_ALLOCATOR(ImageBox);
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ImageBox::ImageBox(DOM::Document& document, GC::Ptr<DOM::Element> element, CSS::ComputedProperties const& style, ImageProvider const& image_provider)
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: ReplacedBox(document, element, style)
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, m_image_provider(image_provider)
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{
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}
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ImageBox::~ImageBox() = default;
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void ImageBox::visit_edges(JS::Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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m_image_provider.image_provider_visit_edges(visitor);
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}
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CSS::SizeWithAspectRatio ImageBox::natural_size() const
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{
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if (m_image_provider.is_image_available()) {
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return {
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.width = m_image_provider.intrinsic_width(),
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.height = m_image_provider.intrinsic_height(),
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.aspect_ratio = m_image_provider.intrinsic_aspect_ratio()
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};
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}
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String alt;
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if (auto element = dom_node())
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alt = element->get_attribute_value(HTML::AttributeNames::alt);
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if (alt.is_empty())
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return { 0, 0, {} };
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auto font = Platform::FontPlugin::the().default_font(12);
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CSSPixels alt_text_width = m_cached_alt_text_width.ensure([&] {
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return CSSPixels::nearest_value_for(font->width(Utf16String::from_utf8(alt)));
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});
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auto width = alt_text_width + 16;
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auto height = CSSPixels::nearest_value_for(font->pixel_size()) + 16;
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Optional<CSSPixelFraction> aspect_ratio;
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if (height > 0)
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aspect_ratio = CSSPixelFraction(width, height);
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return { width, height, aspect_ratio };
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}
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void ImageBox::dom_node_did_update_alt_text(Badge<ImageProvider>)
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{
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m_cached_alt_text_width = {};
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}
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bool ImageBox::renders_as_alt_text() const
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{
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return !m_image_provider.is_image_available();
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}
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RefPtr<Painting::Paintable> ImageBox::create_paintable() const
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{
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return Painting::ImagePaintable::create(*this);
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}
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}
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