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1987318cc2
Where we paint the selection is obviously paint-related information, so let's keep it in the paint tree.
302 lines
10 KiB
C++
302 lines
10 KiB
C++
/*
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* Copyright (c) 2018-2023, 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/Cell.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/StyleComputer.h>
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#include <LibWeb/CSS/StyleProperties.h>
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#include <LibWeb/CSS/StyleValues/ImageStyleValue.h>
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#include <LibWeb/DOM/Document.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
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: public JS::Cell
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, public TreeNode<Node>
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, public Weakable<Node> {
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JS_CELL(Node, JS::Cell);
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public:
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virtual ~Node();
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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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DOM::Element const* pseudo_element_generator() const;
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DOM::Element* pseudo_element_generator();
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enum class GeneratedFor {
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NotGenerated,
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PseudoBefore,
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PseudoAfter
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};
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bool is_generated() const { return m_generated_for != GeneratedFor::NotGenerated; }
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bool is_generated_for_before_pseudo_element() const { return m_generated_for == GeneratedFor::PseudoBefore; }
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bool is_generated_for_after_pseudo_element() const { return m_generated_for == GeneratedFor::PseudoAfter; }
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void set_generated_for(GeneratedFor type, DOM::Element& element)
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{
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m_generated_for = type;
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m_pseudo_element_generator = &element;
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}
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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(JS::GCPtr<Painting::Paintable>);
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virtual JS::GCPtr<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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JS::GCPtr<HTML::Navigable> navigable() const;
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Viewport const& root() const;
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Viewport& root();
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bool is_root_element() const;
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ByteString debug_description() const;
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bool has_style() const { return m_has_style; }
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bool has_style_or_parent_with_style() const;
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virtual bool can_have_children() const { return true; }
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CSS::Display display() const;
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bool is_inline() const;
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bool is_inline_block() const;
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bool is_inline_table() 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_viewport() 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_svg_svg_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_box() const { return false; }
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virtual bool is_list_item_marker_box() const { return false; }
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virtual bool is_table_wrapper() const { return false; }
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virtual bool is_node_with_style_and_box_model_metrics() 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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bool is_grid_item() const { return m_is_grid_item; }
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void set_grid_item(bool b) { m_is_grid_item = b; }
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Box const* containing_block() const;
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Box* containing_block() { return const_cast<Box*>(const_cast<Node const*>(this)->containing_block()); }
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// Closest non-anonymous ancestor box, to be used when resolving percentage values.
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// Anonymous block boxes are ignored when resolving percentage values that would refer to it:
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// the closest non-anonymous ancestor box is used instead.
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// https://www.w3.org/TR/CSS22/visuren.html#anonymous-block-level
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Box const* non_anonymous_containing_block() const;
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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& first_available_font() const;
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Gfx::Font const& scaled_font(PaintContext&) const;
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Gfx::Font const& scaled_font(float scale_factor) const;
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CSS::ImmutableComputedValues const& computed_values() 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 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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u32 initial_quote_nesting_level() const { return m_initial_quote_nesting_level; }
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void set_initial_quote_nesting_level(u32 value) { m_initial_quote_nesting_level = value; }
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protected:
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Node(DOM::Document&, DOM::Node*);
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virtual void visit_edges(Cell::Visitor&) override;
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private:
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friend class NodeWithStyle;
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JS::NonnullGCPtr<DOM::Node> m_dom_node;
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JS::GCPtr<Painting::Paintable> m_paintable;
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JS::NonnullGCPtr<HTML::BrowsingContext> m_browsing_context;
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JS::GCPtr<DOM::Element> m_pseudo_element_generator;
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bool m_anonymous { false };
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bool m_has_style { false };
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bool m_children_are_inline { false };
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bool m_is_flex_item { false };
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bool m_is_grid_item { false };
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GeneratedFor m_generated_for { GeneratedFor::NotGenerated };
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u32 m_initial_quote_nesting_level { 0 };
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};
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class NodeWithStyle : public Node {
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JS_CELL(NodeWithStyle, Node);
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public:
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virtual ~NodeWithStyle() override = default;
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CSS::ImmutableComputedValues const& computed_values() const { return static_cast<CSS::ImmutableComputedValues const&>(*m_computed_values); }
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CSS::MutableComputedValues& mutable_computed_values() { return static_cast<CSS::MutableComputedValues&>(*m_computed_values); }
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void apply_style(const CSS::StyleProperties&);
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Gfx::Font const& first_available_font() const;
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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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JS::NonnullGCPtr<NodeWithStyle> create_anonymous_wrapper() const;
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void transfer_table_box_computed_values_to_wrapper_computed_values(CSS::ComputedValues& wrapper_computed_values);
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virtual void visit_edges(Cell::Visitor& visitor) override;
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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*, NonnullOwnPtr<CSS::ComputedValues>);
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private:
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void reset_table_box_computed_values_used_by_wrapper_to_init_values();
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void propagate_style_to_anonymous_wrappers();
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NonnullOwnPtr<CSS::ComputedValues> m_computed_values;
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RefPtr<CSS::AbstractImageStyleValue const> m_list_style_image;
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};
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class NodeWithStyleAndBoxModelMetrics : public NodeWithStyle {
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JS_CELL(NodeWithStyleAndBoxModelMetrics, 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, NonnullOwnPtr<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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virtual bool is_node_with_style_and_box_model_metrics() const final { return true; }
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BoxModelMetrics m_box_model;
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};
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template<>
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inline bool Node::fast_is<NodeWithStyleAndBoxModelMetrics>() const { return is_node_with_style_and_box_model_metrics(); }
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inline bool Node::has_style_or_parent_with_style() const
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{
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return m_has_style || (parent() != nullptr && parent()->has_style_or_parent_with_style());
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}
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inline Gfx::Font const& Node::first_available_font() const
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{
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VERIFY(has_style_or_parent_with_style());
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if (m_has_style)
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return static_cast<NodeWithStyle const*>(this)->first_available_font();
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return parent()->first_available_font();
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}
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inline Gfx::Font const& Node::scaled_font(PaintContext& context) const
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{
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return scaled_font(context.device_pixels_per_css_pixel());
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}
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inline Gfx::Font const& Node::scaled_font(float scale_factor) const
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{
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auto const& font = first_available_font();
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return *font.with_size(font.point_size() * scale_factor);
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}
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inline const CSS::ImmutableComputedValues& Node::computed_values() const
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{
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VERIFY(has_style_or_parent_with_style());
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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 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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inline Gfx::Font const& NodeWithStyle::first_available_font() const
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{
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// https://drafts.csswg.org/css-fonts/#first-available-font
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// First font for which the character U+0020 (space) is not excluded by a unicode-range
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return computed_values().font_list().font_for_code_point(' ');
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}
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}
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