ef8a72ff3f
This is preparation for allowing blocks with their own internal BFC to flow around floating boxes in the parent BFC. Note that IFC still has the available_space_for_line() API, which returns space available within the IFC's own containing block, while the BFC available_space_for_line() returns space available within its root.
101 lines
3.6 KiB
C++
101 lines
3.6 KiB
C++
/*
|
|
* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/OwnPtr.h>
|
|
#include <LibWeb/Forward.h>
|
|
#include <LibWeb/Layout/FormattingState.h>
|
|
|
|
namespace Web::Layout {
|
|
|
|
class FormattingContext {
|
|
public:
|
|
virtual ~FormattingContext();
|
|
|
|
enum class Type {
|
|
Block,
|
|
Inline,
|
|
Flex,
|
|
Table,
|
|
SVG,
|
|
};
|
|
|
|
virtual void run(Box const&, LayoutMode) = 0;
|
|
|
|
Box const& 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(FormattingState const&, ReplacedBox const&);
|
|
static float compute_height_for_replaced_element(FormattingState const&, ReplacedBox const&);
|
|
|
|
OwnPtr<FormattingContext> create_independent_formatting_context_if_needed(FormattingState&, Box const& child_box);
|
|
|
|
virtual void parent_context_did_dimension_child_root_box() { }
|
|
|
|
struct MinAndMaxContentSize {
|
|
float min_content_size { 0 };
|
|
float max_content_size { 0 };
|
|
};
|
|
|
|
MinAndMaxContentSize calculate_min_and_max_content_width(Layout::Box const&) const;
|
|
MinAndMaxContentSize calculate_min_and_max_content_height(Layout::Box const&) const;
|
|
|
|
float calculate_fit_content_height(Layout::Box const&, Optional<float> available_height) const;
|
|
float calculate_fit_content_width(Layout::Box const&, Optional<float> available_width) const;
|
|
|
|
protected:
|
|
FormattingContext(Type, FormattingState&, Box const&, FormattingContext* parent = nullptr);
|
|
|
|
float calculate_fit_content_size(float min_content_size, float max_content_size, Optional<float> available_space) const;
|
|
FormattingState::IntrinsicSizes calculate_intrinsic_sizes(Layout::Box const&) const;
|
|
|
|
OwnPtr<FormattingContext> layout_inside(Box const&, LayoutMode);
|
|
void compute_position(Box const&);
|
|
|
|
struct AvailableSpaceForLineInfo {
|
|
float left { 0 };
|
|
float right { 0 };
|
|
};
|
|
|
|
struct ShrinkToFitResult {
|
|
float preferred_width { 0 };
|
|
float preferred_minimum_width { 0 };
|
|
};
|
|
|
|
static float tentative_width_for_replaced_element(FormattingState const&, ReplacedBox const&, CSS::Length const& width);
|
|
static float tentative_height_for_replaced_element(FormattingState const&, ReplacedBox const&, CSS::Length const& height);
|
|
static float compute_auto_height_for_block_formatting_context_root(FormattingState const&, BlockContainer const&);
|
|
static float compute_auto_height_for_block_level_element(FormattingState const&, Box const&);
|
|
|
|
ShrinkToFitResult calculate_shrink_to_fit_widths(Box const&);
|
|
|
|
void layout_absolutely_positioned_element(Box const&);
|
|
void compute_width_for_absolutely_positioned_element(Box const&);
|
|
void compute_width_for_absolutely_positioned_non_replaced_element(Box const&);
|
|
void compute_width_for_absolutely_positioned_replaced_element(ReplacedBox const&);
|
|
void compute_height_for_absolutely_positioned_element(Box const&);
|
|
void compute_height_for_absolutely_positioned_non_replaced_element(Box const&);
|
|
void compute_height_for_absolutely_positioned_replaced_element(ReplacedBox const&);
|
|
|
|
Type m_type {};
|
|
|
|
FormattingContext* m_parent { nullptr };
|
|
Box const& m_context_box;
|
|
|
|
FormattingState& m_state;
|
|
};
|
|
|
|
}
|