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4e0abaaede
This gets rid of the assumption that the DOM node of an ImageBox is also its image provider. This will become necessary when generating the image boxes for view transition pseudos, for which the DOM node won't be the image provider. (that'll be the pseudo element itself)
76 lines
2.2 KiB
C++
76 lines
2.2 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, GC::Ref<CSS::ComputedProperties> style, ImageProvider const& image_provider)
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: ReplacedBox(document, element, move(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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void ImageBox::prepare_for_replaced_layout()
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{
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set_natural_width(m_image_provider.intrinsic_width());
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set_natural_height(m_image_provider.intrinsic_height());
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set_natural_aspect_ratio(m_image_provider.intrinsic_aspect_ratio());
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if (renders_as_alt_text()) {
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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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set_natural_width(0);
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set_natural_height(0);
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} else {
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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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set_natural_width(alt_text_width + 16);
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set_natural_height(CSSPixels::nearest_value_for(font->pixel_size()) + 16);
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}
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}
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if (!has_natural_width() && !has_natural_height()) {
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// FIXME: Do something.
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}
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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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GC::Ptr<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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