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- /*
- * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <AK/NonnullRefPtr.h>
- #include <AK/TypeCasts.h>
- #include <AK/Vector.h>
- #include <LibGfx/Rect.h>
- #include <LibJS/Heap/Handle.h>
- #include <LibWeb/CSS/ComputedValues.h>
- #include <LibWeb/CSS/StyleProperties.h>
- #include <LibWeb/Forward.h>
- #include <LibWeb/Layout/BoxModelMetrics.h>
- #include <LibWeb/Painting/PaintContext.h>
- #include <LibWeb/TreeNode.h>
- namespace Web::Layout {
- enum class LayoutMode {
- // Normal layout. No min-content or max-content constraints applied.
- Normal,
- // Intrinsic size determination.
- // Boxes honor min-content and max-content constraints (set via LayoutState::UsedValues::{width,height}_constraint)
- // by considering their containing block to be 0-sized or infinitely large in the relevant axis.
- // https://drafts.csswg.org/css-sizing-3/#intrinsic-sizing
- IntrinsicSizing,
- };
- class Node : public TreeNode<Node> {
- public:
- virtual ~Node();
- size_t serial_id() const { return m_serial_id; }
- bool is_anonymous() const;
- DOM::Node const* dom_node() const;
- DOM::Node* dom_node();
- bool is_generated() const { return m_generated; }
- void set_generated(bool b) { m_generated = b; }
- Painting::Paintable* paintable() { return m_paintable; }
- Painting::Paintable const* paintable() const { return m_paintable; }
- void set_paintable(RefPtr<Painting::Paintable>);
- virtual RefPtr<Painting::Paintable> create_paintable() const;
- DOM::Document& document();
- DOM::Document const& document() const;
- HTML::BrowsingContext const& browsing_context() const;
- HTML::BrowsingContext& browsing_context();
- InitialContainingBlock const& root() const;
- InitialContainingBlock& root();
- bool is_root_element() const;
- String class_name() const;
- String debug_description() const;
- bool has_style() const { return m_has_style; }
- virtual bool can_have_children() const { return true; }
- CSS::Display display() const;
- bool is_inline() const;
- bool is_inline_block() const;
- bool is_out_of_flow(FormattingContext const&) const;
- // These are used to optimize hot is<T> variants for some classes where dynamic_cast is too slow.
- virtual bool is_box() const { return false; }
- virtual bool is_block_container() const { return false; }
- virtual bool is_break_node() const { return false; }
- virtual bool is_text_node() const { return false; }
- virtual bool is_initial_containing_block_box() const { return false; }
- virtual bool is_svg_box() const { return false; }
- virtual bool is_svg_geometry_box() const { return false; }
- virtual bool is_label() const { return false; }
- virtual bool is_replaced_box() const { return false; }
- virtual bool is_list_item_marker_box() const { return false; }
- template<typename T>
- bool fast_is() const = delete;
- bool is_floating() const;
- bool is_positioned() const;
- bool is_absolutely_positioned() const;
- bool is_fixed_position() const;
- bool is_flex_item() const { return m_is_flex_item; }
- void set_flex_item(bool b) { m_is_flex_item = b; }
- BlockContainer const* containing_block() const;
- BlockContainer* containing_block() { return const_cast<BlockContainer*>(const_cast<Node const*>(this)->containing_block()); }
- bool establishes_stacking_context() const;
- bool can_contain_boxes_with_position_absolute() const;
- Gfx::Font const& font() const;
- const CSS::ImmutableComputedValues& computed_values() const;
- float line_height() const;
- NodeWithStyle* parent();
- NodeWithStyle const* parent() const;
- void inserted_into(Node&) { }
- void removed_from(Node&) { }
- void children_changed() { }
- bool is_visible() const { return m_visible; }
- void set_visible(bool visible) { m_visible = visible; }
- virtual void set_needs_display();
- bool children_are_inline() const { return m_children_are_inline; }
- void set_children_are_inline(bool value) { m_children_are_inline = value; }
- Gfx::FloatPoint box_type_agnostic_position() const;
- enum class SelectionState {
- None, // No selection
- Start, // Selection starts in this Node
- End, // Selection ends in this Node
- StartAndEnd, // Selection starts and ends in this Node
- Full, // Selection starts before and ends after this Node
- };
- SelectionState selection_state() const { return m_selection_state; }
- void set_selection_state(SelectionState state) { m_selection_state = state; }
- protected:
- Node(DOM::Document&, DOM::Node*);
- private:
- friend class NodeWithStyle;
- JS::Handle<DOM::Document> m_document;
- JS::Handle<DOM::Node> m_dom_node;
- RefPtr<Painting::Paintable> m_paintable;
- size_t m_serial_id { 0 };
- bool m_has_style { false };
- bool m_visible { true };
- bool m_children_are_inline { false };
- SelectionState m_selection_state { SelectionState::None };
- bool m_is_flex_item { false };
- bool m_generated { false };
- };
- class NodeWithStyle : public Node {
- public:
- virtual ~NodeWithStyle() override = default;
- const CSS::ImmutableComputedValues& computed_values() const { return static_cast<const CSS::ImmutableComputedValues&>(m_computed_values); }
- void apply_style(const CSS::StyleProperties&);
- Gfx::Font const& font() const { return *m_font; }
- float line_height() const { return m_line_height; }
- Vector<CSS::BackgroundLayerData> const& background_layers() const { return computed_values().background_layers(); }
- const CSS::AbstractImageStyleValue* list_style_image() const { return m_list_style_image; }
- NonnullRefPtr<NodeWithStyle> create_anonymous_wrapper() const;
- protected:
- NodeWithStyle(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);
- NodeWithStyle(DOM::Document&, DOM::Node*, CSS::ComputedValues);
- private:
- CSS::ComputedValues m_computed_values;
- RefPtr<Gfx::Font> m_font;
- float m_line_height { 0 };
- RefPtr<CSS::AbstractImageStyleValue> m_list_style_image;
- };
- class NodeWithStyleAndBoxModelMetrics : public NodeWithStyle {
- public:
- BoxModelMetrics& box_model() { return m_box_model; }
- BoxModelMetrics const& box_model() const { return m_box_model; }
- protected:
- NodeWithStyleAndBoxModelMetrics(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
- : NodeWithStyle(document, node, move(style))
- {
- }
- NodeWithStyleAndBoxModelMetrics(DOM::Document& document, DOM::Node* node, CSS::ComputedValues computed_values)
- : NodeWithStyle(document, node, move(computed_values))
- {
- }
- private:
- BoxModelMetrics m_box_model;
- };
- inline Gfx::Font const& Node::font() const
- {
- if (m_has_style)
- return static_cast<NodeWithStyle const*>(this)->font();
- return parent()->font();
- }
- inline const CSS::ImmutableComputedValues& Node::computed_values() const
- {
- if (m_has_style)
- return static_cast<NodeWithStyle const*>(this)->computed_values();
- return parent()->computed_values();
- }
- inline float Node::line_height() const
- {
- if (m_has_style)
- return static_cast<NodeWithStyle const*>(this)->line_height();
- return parent()->line_height();
- }
- inline NodeWithStyle const* Node::parent() const
- {
- return static_cast<NodeWithStyle const*>(TreeNode<Node>::parent());
- }
- inline NodeWithStyle* Node::parent()
- {
- return static_cast<NodeWithStyle*>(TreeNode<Node>::parent());
- }
- }
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