dabbade05c
This patch breaks FormattingContext::layout_inside() into two functions, one that creates an independent formatting context (if needed), and another that calls the former and then performs the inside layout within the appropriate context. The main goal here was to make layout_inside() return the independent formatting context if one was created. This will allow us to defer certain operations in child contexts until the parent context has finished formatting the child root box.
74 lines
2.2 KiB
C++
74 lines
2.2 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 ~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&, 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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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(const ReplacedBox&);
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static float compute_height_for_replaced_element(const ReplacedBox&);
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OwnPtr<FormattingContext> create_independent_formatting_context_if_needed(Box& child_box);
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protected:
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FormattingContext(Type, Box&, FormattingContext* parent = nullptr);
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OwnPtr<FormattingContext> 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& height);
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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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Type m_type {};
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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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