mirror of
https://github.com/LadybirdBrowser/ladybird.git
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237 lines
7.4 KiB
C++
237 lines
7.4 KiB
C++
/*
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* Copyright (c) 2018-2021, 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/NonnullRefPtr.h>
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#include <AK/TypeCasts.h>
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#include <AK/Vector.h>
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#include <LibGfx/Rect.h>
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#include <LibJS/Heap/Handle.h>
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#include <LibWeb/CSS/ComputedValues.h>
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#include <LibWeb/CSS/StyleProperties.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Layout/BoxModelMetrics.h>
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#include <LibWeb/Painting/PaintContext.h>
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#include <LibWeb/TreeNode.h>
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namespace Web::Layout {
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enum class LayoutMode {
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// Normal layout. No min-content or max-content constraints applied.
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Normal,
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// Intrinsic size determination.
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// Boxes honor min-content and max-content constraints (set via LayoutState::UsedValues::{width,height}_constraint)
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// by considering their containing block to be 0-sized or infinitely large in the relevant axis.
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// https://drafts.csswg.org/css-sizing-3/#intrinsic-sizing
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IntrinsicSizing,
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};
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class Node : public TreeNode<Node> {
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public:
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virtual ~Node();
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size_t serial_id() const { return m_serial_id; }
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bool is_anonymous() const;
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DOM::Node const* dom_node() const;
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DOM::Node* dom_node();
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bool is_generated() const { return m_generated; }
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void set_generated(bool b) { m_generated = b; }
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Painting::Paintable* paintable() { return m_paintable; }
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Painting::Paintable const* paintable() const { return m_paintable; }
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void set_paintable(RefPtr<Painting::Paintable>);
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virtual RefPtr<Painting::Paintable> create_paintable() const;
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DOM::Document& document();
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DOM::Document const& document() const;
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HTML::BrowsingContext const& browsing_context() const;
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HTML::BrowsingContext& browsing_context();
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InitialContainingBlock const& root() const;
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InitialContainingBlock& root();
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bool is_root_element() const;
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String class_name() const;
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String debug_description() const;
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bool has_style() const { return m_has_style; }
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virtual bool can_have_children() const { return true; }
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bool is_inline() const;
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bool is_inline_block() const;
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bool is_out_of_flow(FormattingContext const&) const;
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// These are used to optimize hot is<T> variants for some classes where dynamic_cast is too slow.
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virtual bool is_box() const { return false; }
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virtual bool is_block_container() const { return false; }
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virtual bool is_break_node() const { return false; }
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virtual bool is_text_node() const { return false; }
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virtual bool is_initial_containing_block_box() const { return false; }
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virtual bool is_svg_box() const { return false; }
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virtual bool is_svg_geometry_box() const { return false; }
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virtual bool is_label() const { return false; }
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virtual bool is_replaced_box() const { return false; }
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virtual bool is_list_item_marker_box() const { return false; }
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template<typename T>
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bool fast_is() const = delete;
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bool is_floating() const;
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bool is_positioned() const;
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bool is_absolutely_positioned() const;
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bool is_fixed_position() const;
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bool is_flex_item() const { return m_is_flex_item; }
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void set_flex_item(bool b) { m_is_flex_item = b; }
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BlockContainer const* containing_block() const;
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BlockContainer* containing_block() { return const_cast<BlockContainer*>(const_cast<Node const*>(this)->containing_block()); }
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bool establishes_stacking_context() const;
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bool can_contain_boxes_with_position_absolute() const;
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Gfx::Font const& font() const;
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const CSS::ImmutableComputedValues& computed_values() const;
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float line_height() const;
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NodeWithStyle* parent();
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NodeWithStyle const* parent() const;
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void inserted_into(Node&) { }
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void removed_from(Node&) { }
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void children_changed() { }
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bool is_visible() const { return m_visible; }
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void set_visible(bool visible) { m_visible = visible; }
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virtual void set_needs_display();
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bool children_are_inline() const { return m_children_are_inline; }
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void set_children_are_inline(bool value) { m_children_are_inline = value; }
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Gfx::FloatPoint box_type_agnostic_position() const;
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enum class SelectionState {
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None, // No selection
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Start, // Selection starts in this Node
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End, // Selection ends in this Node
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StartAndEnd, // Selection starts and ends in this Node
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Full, // Selection starts before and ends after this Node
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};
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SelectionState selection_state() const { return m_selection_state; }
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void set_selection_state(SelectionState state) { m_selection_state = state; }
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protected:
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Node(DOM::Document&, DOM::Node*);
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private:
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friend class NodeWithStyle;
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JS::Handle<DOM::Document> m_document;
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JS::Handle<DOM::Node> m_dom_node;
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RefPtr<Painting::Paintable> m_paintable;
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size_t m_serial_id { 0 };
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bool m_has_style { false };
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bool m_visible { true };
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bool m_children_are_inline { false };
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SelectionState m_selection_state { SelectionState::None };
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bool m_is_flex_item { false };
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bool m_generated { false };
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};
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class NodeWithStyle : public Node {
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public:
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virtual ~NodeWithStyle() override = default;
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const CSS::ImmutableComputedValues& computed_values() const { return static_cast<const CSS::ImmutableComputedValues&>(m_computed_values); }
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void apply_style(const CSS::StyleProperties&);
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Gfx::Font const& font() const { return *m_font; }
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float line_height() const { return m_line_height; }
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Vector<CSS::BackgroundLayerData> const& background_layers() const { return computed_values().background_layers(); }
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const CSS::AbstractImageStyleValue* list_style_image() const { return m_list_style_image; }
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NonnullRefPtr<NodeWithStyle> create_anonymous_wrapper() const;
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protected:
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NodeWithStyle(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);
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NodeWithStyle(DOM::Document&, DOM::Node*, CSS::ComputedValues);
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private:
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CSS::ComputedValues m_computed_values;
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RefPtr<Gfx::Font> m_font;
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float m_line_height { 0 };
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RefPtr<CSS::AbstractImageStyleValue> m_list_style_image;
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};
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class NodeWithStyleAndBoxModelMetrics : public NodeWithStyle {
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public:
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BoxModelMetrics& box_model() { return m_box_model; }
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BoxModelMetrics const& box_model() const { return m_box_model; }
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protected:
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NodeWithStyleAndBoxModelMetrics(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
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: NodeWithStyle(document, node, move(style))
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{
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}
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NodeWithStyleAndBoxModelMetrics(DOM::Document& document, DOM::Node* node, CSS::ComputedValues computed_values)
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: NodeWithStyle(document, node, move(computed_values))
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{
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}
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private:
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BoxModelMetrics m_box_model;
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};
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inline Gfx::Font const& Node::font() const
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{
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if (m_has_style)
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return static_cast<NodeWithStyle const*>(this)->font();
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return parent()->font();
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}
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inline const CSS::ImmutableComputedValues& Node::computed_values() const
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{
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if (m_has_style)
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return static_cast<NodeWithStyle const*>(this)->computed_values();
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return parent()->computed_values();
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}
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inline float Node::line_height() const
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{
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if (m_has_style)
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return static_cast<NodeWithStyle const*>(this)->line_height();
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return parent()->line_height();
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}
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inline NodeWithStyle const* Node::parent() const
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{
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return static_cast<NodeWithStyle const*>(TreeNode<Node>::parent());
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}
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inline NodeWithStyle* Node::parent()
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{
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return static_cast<NodeWithStyle*>(TreeNode<Node>::parent());
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}
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}
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