third_party/WebKit/Source/bindings/core/v8/V0CustomElementConstructorBuilder.h

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#ifndef V0CustomElementConstructorBuilder_h
#define V0CustomElementConstructorBuilder_h

#include "bindings/core/v8/ScriptValue.h"
#include "bindings/core/v8/V8V0CustomElementLifecycleCallbacks.h"
#include "core/dom/QualifiedName.h"
#include "core/dom/custom/V0CustomElementLifecycleCallbacks.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefPtr.h"
#include "wtf/text/AtomicString.h"
#include <v8.h>

namespace blink {

class V0CustomElementDefinition;
class Document;
class ElementRegistrationOptions;
class ExceptionState;
class QualifiedName;
struct WrapperTypeInfo;

// Handles the scripting-specific parts of the Custom Elements element
// registration algorithm and constructor generation algorithm. It is
// used in the implementation of those algorithms in
// Document::registerElement.
class V0CustomElementConstructorBuilder {
    WTF_MAKE_NONCOPYABLE(V0CustomElementConstructorBuilder);
    STACK_ALLOCATED();
public:
    V0CustomElementConstructorBuilder(ScriptState*, const ElementRegistrationOptions&);

    // The builder accumulates state and may run script at specific
    // points. These methods must be called in order. When one fails
    // (returns false), the calls must stop.

    bool isFeatureAllowed() const;
    bool validateOptions(const AtomicString& type, QualifiedName& tagName, ExceptionState&);
    V0CustomElementLifecycleCallbacks* createCallbacks();
    bool createConstructor(Document*, V0CustomElementDefinition*, ExceptionState&);
    bool didRegisterDefinition() const;

    // This method collects a return value for the bindings. It is
    // safe to call this method even if the builder failed; it will
    // return an empty value.
    ScriptValue bindingsReturnValue() const;

private:
    bool hasValidPrototypeChainFor(const WrapperTypeInfo*) const;
    bool prototypeIsValid(const AtomicString& type, ExceptionState&) const;
    v8::MaybeLocal<v8::Function> retrieveCallback(const char* name);

    RefPtr<ScriptState> m_scriptState;
    const ElementRegistrationOptions& m_options;
    v8::Local<v8::Object> m_prototype;
    v8::Local<v8::Function> m_constructor;
    Member<V8V0CustomElementLifecycleCallbacks> m_callbacks;
};

} // namespace blink

#endif // V0CustomElementConstructorBuilder_h