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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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****************************************************************************/

#include "qbuiltintypes_p.h"
#include "qcommonnamespaces_p.h"
#include "qcommonsequencetypes_p.h"
#include "qpatternistlocale_p.h"
#include "qqnamevalue_p.h"
#include "qatomicstring_p.h"

#include "qattributenamevalidator_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

AttributeNameValidator::AttributeNameValidator(const Expression::Ptr &source) : SingleContainer(source)
{
}

Item AttributeNameValidator::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item name(m_operand->evaluateSingleton(context));
    const QXmlName qName(name.as<QNameValue>()->qName());

    if(qName.namespaceURI() == StandardNamespaces::xmlns)
    {
        context->error(QtXmlPatterns::tr("The namespace URI in the name for a "
                                         "computed attribute cannot be %1.")
                       .arg(formatURI(CommonNamespaces::XMLNS)),
                       ReportContext::XQDY0044, this);
        return Item(); /* Silence warning. */
    }
    else if(qName.namespaceURI() == StandardNamespaces::empty &&
            qName.localName() == StandardLocalNames::xmlns)
    {
        context->error(QtXmlPatterns::tr("The name for a computed attribute "
                                         "cannot have the namespace URI %1 "
                                         "with the local name %2.")
                          .arg(formatURI(CommonNamespaces::XMLNS))
                          .arg(formatKeyword("xmlns")),
                       ReportContext::XQDY0044, this);
        return Item(); /* Silence warning. */
    }
    else if(!qName.hasPrefix() && qName.hasNamespace())
    {
        return Item(QNameValue::fromValue(context->namePool(),
                                          QXmlName(qName.namespaceURI(), qName.localName(), StandardPrefixes::ns0)));
    }
    else
        return name;
}

SequenceType::Ptr AttributeNameValidator::staticType() const
{
    return m_operand->staticType();
}

SequenceType::List AttributeNameValidator::expectedOperandTypes() const
{
    SequenceType::List result;
    result.append(CommonSequenceTypes::ExactlyOneQName);
    return result;
}

ExpressionVisitorResult::Ptr AttributeNameValidator::accept(const ExpressionVisitor::Ptr &visitor) const
{
    return visitor->visit(this);
}

QT_END_NAMESPACE
