third_party/WebKit/Source/core/dom/custom/V0CustomElementDescriptor.h

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#ifndef V0CustomElementDescriptor_h
#define V0CustomElementDescriptor_h

#include "platform/heap/Handle.h"
#include "wtf/HashTableDeletedValueType.h"
#include "wtf/text/AtomicString.h"

namespace blink {

struct V0CustomElementDescriptorHash;

// A Custom Element descriptor is everything necessary to match a
// Custom Element instance to a definition.
class V0CustomElementDescriptor {
    DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
public:
    V0CustomElementDescriptor(const AtomicString& type, const AtomicString& namespaceURI, const AtomicString& localName)
        : m_type(type)
        , m_namespaceURI(namespaceURI)
        , m_localName(localName)
    {
    }

    ~V0CustomElementDescriptor() { }

    // Specifies whether the custom element is in the HTML or SVG
    // namespace.
    const AtomicString& namespaceURI() const { return m_namespaceURI; }

    // The tag name.
    const AtomicString& localName() const { return m_localName; }

    // The name of the definition. For custom tags, this is the tag
    // name and the same as "localName". For type extensions, this is
    // the value of the "is" attribute.
    const AtomicString& type() const { return m_type; }

    bool isTypeExtension() const { return m_type != m_localName; }

    // Stuff for hashing.

    V0CustomElementDescriptor() { }
    explicit V0CustomElementDescriptor(WTF::HashTableDeletedValueType value)
        : m_type(value) { }
    bool isHashTableDeletedValue() const { return m_type.isHashTableDeletedValue(); }

    bool operator==(const V0CustomElementDescriptor& other) const
    {
        return m_type == other.m_type
            && m_localName == other.m_localName
            && m_namespaceURI == other.m_namespaceURI;
    }

private:
    AtomicString m_type;
    AtomicString m_namespaceURI;
    AtomicString m_localName;
};

} // namespace blink

namespace WTF {

template<> struct DefaultHash<blink::V0CustomElementDescriptor> {
    typedef blink::V0CustomElementDescriptorHash Hash;
};

} // namespace WTF

#endif // V0CustomElementDescriptor_h