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dd0c821291
We add a new formatting context that simply runs layout for an anonymous block formatting context within it. This allows replaced elements to contain children, if the parent rewrites inline-flow to inline-block.
76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
/*
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* Copyright (c) 2026, Gregory Bertilson <gregory@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/Layout/BlockFormattingContext.h>
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#include <LibWeb/Layout/ReplacedWithChildrenFormattingContext.h>
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namespace Web::Layout {
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ReplacedWithChildrenFormattingContext::ReplacedWithChildrenFormattingContext(LayoutState& state, LayoutMode layout_mode, Box const& box, FormattingContext* parent)
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: FormattingContext(Type::ReplacedWithChildren, layout_mode, state, box, parent)
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{
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}
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void ReplacedWithChildrenFormattingContext::run(AvailableSpace const& available_space)
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{
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auto& root_state = m_state.get_mutable(context_box());
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auto content_width = root_state.content_width();
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// Mark the replaced element as having definite dimensions when the parent FC has
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// computed them from intrinsic size, so children with percentage sizes can resolve.
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auto natural_size = context_box().natural_size();
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if (natural_size.has_width())
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root_state.set_has_definite_width(true);
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if (natural_size.has_height())
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root_state.set_has_definite_height(true);
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// For height, use the parent-set content height if it's been resolved (e.g. explicit height
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// or intrinsic height), otherwise use the available space from the parent formatting context.
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auto child_available_height = root_state.has_definite_height()
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? AvailableSize::make_definite(root_state.content_height())
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: available_space.height;
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auto child_available_space = AvailableSpace(
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AvailableSize::make_definite(content_width),
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child_available_height);
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// The TreeBuilder wraps shadow DOM children in an anonymous BlockContainer.
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// Delegate layout to a BFC for that wrapper.
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auto const* wrapper = context_box().first_child_of_type<BlockContainer>();
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if (!wrapper)
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return;
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auto& wrapper_state = m_state.get_mutable(*wrapper);
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wrapper_state.set_content_width(content_width);
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wrapper_state.set_content_offset({ 0, 0 });
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auto bfc = make<BlockFormattingContext>(m_state, m_layout_mode, *wrapper, this);
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bfc->run(child_available_space);
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m_automatic_content_width = content_width;
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m_automatic_content_height = bfc->automatic_content_height();
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wrapper_state.set_content_height(m_automatic_content_height);
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bfc->parent_context_did_dimension_child_root_box();
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}
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CSSPixels ReplacedWithChildrenFormattingContext::automatic_content_width() const
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{
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return m_automatic_content_width;
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}
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CSSPixels ReplacedWithChildrenFormattingContext::automatic_content_height() const
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{
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return m_automatic_content_height;
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}
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void ReplacedWithChildrenFormattingContext::parent_context_did_dimension_child_root_box()
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{
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layout_absolutely_positioned_children();
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}
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}
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