ladybird/Libraries/LibWeb/DOM/PseudoElement.h

/*
 * Copyright (c) 2025, Sam Atkins <sam@ladybird.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/OwnPtr.h>
#include <LibGC/CellAllocator.h>
#include <LibJS/Heap/Cell.h>
#include <LibWeb/CSS/StyleProperty.h>
#include <LibWeb/Forward.h>
#include <LibWeb/PixelUnits.h>
#include <LibWeb/TreeNode.h>

namespace Web::DOM {

class PseudoElement : public JS::Cell {
    GC_CELL(PseudoElement, JS::Cell);
    GC_DECLARE_ALLOCATOR(PseudoElement);

    GC::Ptr<Layout::NodeWithStyle> layout_node() const { return m_layout_node; }
    void set_layout_node(GC::Ptr<Layout::NodeWithStyle> value) { m_layout_node = value; }

    GC::Ptr<CSS::CascadedProperties> cascaded_properties() const { return m_cascaded_properties; }
    void set_cascaded_properties(GC::Ptr<CSS::CascadedProperties> value) { m_cascaded_properties = value; }

    GC::Ptr<CSS::ComputedProperties> computed_properties() const { return m_computed_properties; }
    void set_computed_properties(GC::Ptr<CSS::ComputedProperties> value) { m_computed_properties = value; }

    HashMap<FlyString, CSS::StyleProperty> const& custom_properties() const { return m_custom_properties; }
    void set_custom_properties(HashMap<FlyString, CSS::StyleProperty> value) { m_custom_properties = move(value); }

    bool has_non_empty_counters_set() const { return m_counters_set; }
    Optional<CSS::CountersSet const&> counters_set() const;
    CSS::CountersSet& ensure_counters_set();
    void set_counters_set(OwnPtr<CSS::CountersSet>&&);

    CSSPixelPoint scroll_offset() const { return m_scroll_offset; }
    void set_scroll_offset(CSSPixelPoint value) { m_scroll_offset = value; }

    virtual void visit_edges(JS::Cell::Visitor&) override;

private:
    GC::Ptr<Layout::NodeWithStyle> m_layout_node;
    GC::Ptr<CSS::CascadedProperties> m_cascaded_properties;
    GC::Ptr<CSS::ComputedProperties> m_computed_properties;
    HashMap<FlyString, CSS::StyleProperty> m_custom_properties;
    OwnPtr<CSS::CountersSet> m_counters_set;
    CSSPixelPoint m_scroll_offset {};
};

// https://drafts.csswg.org/css-view-transitions/#pseudo-element-tree
class PseudoElementTreeNode final
    : public PseudoElement
    , TreeNode<PseudoElementTreeNode> {
    GC_CELL(PseudoElementTreeNode, PseudoElement);
    GC_DECLARE_ALLOCATOR(PseudoElementTreeNode);
};

}