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fa43a4118e
I was wrong in 56df05ae44, there are
situations where floating children should not affect the auto height of
their parent.
It turns out we were using the "height:auto for BFC roots" algorithm for
all height:auto blocks. This patch fixes that by splitting it into two
separate functions, and implementing most of the two different variants.
Note that we don't support vertical margin collapsing here yet.
Thanks to Tim for noticing the error! :^)
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
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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 <AK/OwnPtr.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Layout/FormattingState.h>
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namespace Web::Layout {
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class FormattingContext {
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public:
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virtual ~FormattingContext();
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enum class Type {
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Block,
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Inline,
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Flex,
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Table,
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SVG,
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};
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virtual void run(Box const&, LayoutMode) = 0;
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Box const& context_box() const { return m_context_box; }
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FormattingContext* parent() { return m_parent; }
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const FormattingContext* parent() const { return m_parent; }
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Type type() const { return m_type; }
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bool is_block_formatting_context() const { return type() == Type::Block; }
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virtual bool inhibits_floating() const { return false; }
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static bool creates_block_formatting_context(const Box&);
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static float compute_width_for_replaced_element(FormattingState const&, ReplacedBox const&);
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static float compute_height_for_replaced_element(FormattingState const&, ReplacedBox const&);
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OwnPtr<FormattingContext> create_independent_formatting_context_if_needed(FormattingState&, Box const& child_box);
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virtual void parent_context_did_dimension_child_root_box() { }
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protected:
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FormattingContext(Type, FormattingState&, Box const&, FormattingContext* parent = nullptr);
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OwnPtr<FormattingContext> layout_inside(Box const&, LayoutMode);
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void compute_position(Box const&);
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struct ShrinkToFitResult {
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float preferred_width { 0 };
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float preferred_minimum_width { 0 };
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};
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static float tentative_width_for_replaced_element(FormattingState const&, ReplacedBox const&, CSS::Length const& width);
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static float tentative_height_for_replaced_element(FormattingState const&, ReplacedBox const&, CSS::Length const& height);
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static float compute_auto_height_for_block_formatting_context_root(FormattingState const&, BlockContainer const&);
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static float compute_auto_height_for_block_level_element(FormattingState const&, Box const&);
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ShrinkToFitResult calculate_shrink_to_fit_widths(Box const&);
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void layout_absolutely_positioned_element(Box const&);
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void compute_width_for_absolutely_positioned_element(Box const&);
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void compute_width_for_absolutely_positioned_non_replaced_element(Box const&);
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void compute_width_for_absolutely_positioned_replaced_element(ReplacedBox const&);
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void compute_height_for_absolutely_positioned_element(Box const&);
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void compute_height_for_absolutely_positioned_non_replaced_element(Box const&);
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void compute_height_for_absolutely_positioned_replaced_element(ReplacedBox const&);
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Type m_type {};
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FormattingContext* m_parent { nullptr };
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Box const& m_context_box;
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FormattingState& m_state;
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};
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}
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