Source/core/html/imports/HTMLImportState.h

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#ifndef HTMLImportState_h
#define HTMLImportState_h

#include "wtf/Assertions.h"

namespace WebCore {

class HTMLImportState {
public:
    enum Value {
        BlockingScriptExecution = 0,
        Active,
        Ready,
        Invalid
    };

    explicit HTMLImportState(Value value = BlockingScriptExecution)
        : m_value(value)
    { }

    bool shouldBlockScriptExecution() const { return checkedValue() <= BlockingScriptExecution; }
    bool isReady() const { return checkedValue() == Ready; }
    bool isValid() const { return m_value != Invalid; }
    bool operator==(const HTMLImportState& other) const { return m_value == other.m_value; }
    bool operator!=(const HTMLImportState& other) const { return !(*this == other); }
    bool operator<=(const HTMLImportState& other) const { return m_value <= other.m_value; }

#if !defined(NDEBUG)
    Value peekValueForDebug() const { return m_value; }
#endif

    static HTMLImportState invalidState() { return HTMLImportState(Invalid); }
    static HTMLImportState blockedState() { return HTMLImportState(BlockingScriptExecution); }
private:
    Value checkedValue() const;
    Value m_value;
};

inline HTMLImportState::Value HTMLImportState::checkedValue() const
{
    ASSERT(isValid());
    return m_value;
}

}

#endif