2844f89a83
In some situations, a layout box should not participate in the standard layout process, for example when set to `position: absolute`.
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020, 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 <LibWeb/Forward.h>
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namespace Web::Layout {
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class FormattingContext {
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public:
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virtual void run(Box&, LayoutMode) = 0;
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Box& context_box() { return *m_context_box; }
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const Box& 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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virtual bool is_block_formatting_context() const { return false; }
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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(const ReplacedBox&);
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static float compute_height_for_replaced_element(const ReplacedBox&);
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protected:
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FormattingContext(Box&, FormattingContext* parent = nullptr);
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virtual ~FormattingContext();
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void layout_inside(Box&, LayoutMode);
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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(const ReplacedBox&, const CSS::Length& width);
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static float tentative_height_for_replaced_element(const ReplacedBox&, const CSS::Length& width);
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ShrinkToFitResult calculate_shrink_to_fit_widths(Box&);
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void layout_absolutely_positioned_element(Box&);
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void compute_width_for_absolutely_positioned_element(Box&);
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void compute_width_for_absolutely_positioned_non_replaced_element(Box&);
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void compute_width_for_absolutely_positioned_replaced_element(ReplacedBox&);
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void compute_height_for_absolutely_positioned_element(Box&);
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void compute_height_for_absolutely_positioned_non_replaced_element(Box&);
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void compute_height_for_absolutely_positioned_replaced_element(ReplacedBox&);
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FormattingContext* m_parent { nullptr };
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Box* m_context_box { nullptr };
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};
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}
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