UserActionElementSet.h   [plain text]


/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 * Copyright (C) 2013-2017 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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#pragma once

#include <wtf/HashMap.h>
#include <wtf/OptionSet.h>
#include <wtf/Ref.h>

namespace WebCore {

class Element;

class UserActionElementSet {
public:
    bool isActive(const Element& element) { return hasFlag(element, Flag::IsActive); }
    bool isFocused(const Element& element) { return hasFlag(element, Flag::IsFocused); }
    bool isHovered(const Element& element) { return hasFlag(element, Flag::IsHovered); }
    bool inActiveChain(const Element& element) { return hasFlag(element, Flag::InActiveChain); }

    void setActive(Element& element, bool enable) { setFlags(element, enable, Flag::IsActive); }
    void setFocused(Element& element, bool enable) { setFlags(element, enable, Flag::IsFocused); }
    void setHovered(Element& element, bool enable) { setFlags(element, enable, Flag::IsHovered); }
    void setInActiveChain(Element& element, bool enable) { setFlags(element, enable, Flag::InActiveChain); }

    void clearActiveAndHovered(Element& element) { clearFlags(element, { Flag::IsActive, Flag::InActiveChain, Flag::IsHovered }); }

    void clear();

private:
    enum class Flag {
        IsActive = 1 << 0,
        InActiveChain = 1 << 1,
        IsHovered = 1 << 2,
        IsFocused = 1 << 3
    };

    void setFlags(Element& element, bool enable, OptionSet<Flag> flags) { enable ? setFlags(element, flags) : clearFlags(element, flags); }
    void setFlags(Element&, OptionSet<Flag>);
    void clearFlags(Element&, OptionSet<Flag>);
    bool hasFlag(const Element&, Flag) const;

    HashMap<RefPtr<Element>, OptionSet<Flag>> m_elements;
};

} // namespace WebCore