Source/WebCore/css/typedom/CSSOMVariableReferenceValue.cpp

/*
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#include "config.h"
#include "CSSOMVariableReferenceValue.h"

#if ENABLE(CSS_TYPED_OM)

#include "CSSUnparsedValue.h"
#include "ExceptionOr.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/text/StringBuilder.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(CSSOMVariableReferenceValue);

ExceptionOr<Ref<CSSOMVariableReferenceValue>> CSSOMVariableReferenceValue::create(String&& variable, RefPtr<CSSUnparsedValue>&& fallback)
{
    if (!variable.startsWith("--"))
        return Exception { TypeError, "Custom Variable Reference needs to have \"--\" prefix."_s };
    
    return adoptRef(*new CSSOMVariableReferenceValue(WTFMove(variable), WTFMove(fallback)));
}

ExceptionOr<void> CSSOMVariableReferenceValue::setVariable(String&& variable)
{
    if (!variable.startsWith("--"))
        return Exception { TypeError, "Custom Variable Reference needs to have \"--\" prefix."_s };
    
    m_variable = WTFMove(variable);
    return { };
}

String CSSOMVariableReferenceValue::toString() const
{
    StringBuilder builder;
    serialize(builder);
    
    return builder.toString();
}

void CSSOMVariableReferenceValue::serialize(StringBuilder& builder) const
{
    builder.append("var(");
    builder.append(m_variable);
    if (m_fallback) {
        builder.append(", ");
        m_fallback->serialize(builder);
    }
    builder.append(')');
}

} // namespace WebCore

#endif