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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <LibWeb/Forward.h>
namespace Web::Layout {
class FormattingContext {
public:
virtual ~FormattingContext();
enum class Type {
Block,
Inline,
Flex,
Table,
SVG,
};
virtual void run(Box&, LayoutMode) = 0;
Box& context_box() { return m_context_box; }
const Box& context_box() const { return m_context_box; }
FormattingContext* parent() { return m_parent; }
const FormattingContext* parent() const { return m_parent; }
Type type() const { return m_type; }
bool is_block_formatting_context() const { return type() == Type::Block; }
virtual bool inhibits_floating() const { return false; }
static bool creates_block_formatting_context(const Box&);
static float compute_width_for_replaced_element(const ReplacedBox&);
static float compute_height_for_replaced_element(const ReplacedBox&);
OwnPtr<FormattingContext> create_independent_formatting_context_if_needed(Box& child_box);
virtual void parent_context_did_dimension_child_root_box() { }
protected:
FormattingContext(Type, Box&, FormattingContext* parent = nullptr);
OwnPtr<FormattingContext> layout_inside(Box&, LayoutMode);
struct ShrinkToFitResult {
float preferred_width { 0 };
float preferred_minimum_width { 0 };
};
static float tentative_width_for_replaced_element(const ReplacedBox&, const CSS::Length& width);
static float tentative_height_for_replaced_element(const ReplacedBox&, const CSS::Length& height);
enum ConsiderFloats {
Yes,
No,
};
static float compute_auto_height_for_block_level_element(Box const&, ConsiderFloats consider_floats = ConsiderFloats::Yes);
ShrinkToFitResult calculate_shrink_to_fit_widths(Box&);
void layout_absolutely_positioned_element(Box&);
void compute_width_for_absolutely_positioned_element(Box&);
void compute_width_for_absolutely_positioned_non_replaced_element(Box&);
void compute_width_for_absolutely_positioned_replaced_element(ReplacedBox&);
void compute_height_for_absolutely_positioned_element(Box&);
void compute_height_for_absolutely_positioned_non_replaced_element(Box&);
void compute_height_for_absolutely_positioned_replaced_element(ReplacedBox&);
Type m_type {};
FormattingContext* m_parent { nullptr };
Box& m_context_box;
};
}
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