Source/core/dom/custom/CustomElementLifecycleCallbacks.h

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#ifndef CustomElementLifecycleCallbacks_h
#define CustomElementLifecycleCallbacks_h

#include "wtf/RefCounted.h"
#include "wtf/text/AtomicString.h"

namespace WebCore {

class Element;

class CustomElementLifecycleCallbacks : public RefCounted<CustomElementLifecycleCallbacks> {
public:
    virtual ~CustomElementLifecycleCallbacks() { }

    bool hasCreatedCallback() const { return m_which & Created; }
    virtual void created(Element*) = 0;

    bool hasEnteredViewCallback() const { return m_which & EnteredView; }
    virtual void enteredView(Element*) = 0;

    bool hasLeftViewCallback() const { return m_which & LeftView; }
    virtual void leftView(Element*) = 0;

    bool hasAttributeChangedCallback() const { return m_which & AttributeChanged; }
    virtual void attributeChanged(Element*, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue) = 0;

    enum CallbackType {
        None             = 0,
        Created          = 1 << 0,
        EnteredView      = 1 << 1,
        LeftView         = 1 << 2,
        AttributeChanged = 1 << 3
    };

protected:
    CustomElementLifecycleCallbacks(CallbackType which) : m_which(which) { }

private:
    CallbackType m_which;
};

}

#endif // CustomElementLifecycleCallbacks_h