C++ Ptr::namePool方法代码示例

Item NamespaceURIForPrefixFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item prefixItem(m_operands.first()->evaluateSingleton(context));
    QXmlName::PrefixCode prefix;

    if(prefixItem)
        prefix = context->namePool()->allocatePrefix(prefixItem.stringValue());
    else
        prefix = StandardPrefixes::empty;

    const Item eleItem(m_operands.last()->evaluateSingleton(context));
    Q_ASSERT(eleItem);

    const QXmlName::NamespaceCode ns = eleItem.asNode().namespaceForPrefix(prefix);

    if(ns == NamespaceResolver::NoBinding)
    {
        /* This is a bit tricky. The default namespace is not considered an in-scope binding
         * on a node, but the specification for this function do consider it a binding and therefore
         * the empty string. */
        if(prefix == StandardPrefixes::empty)
            return CommonValues::EmptyString;
        else
            return Item();
    }
    else
        return toItem(AnyURI::fromValue(context->namePool()->stringForNamespace(ns)));
}

        /**
         * Performs the actual tracing.
         */
        Item mapToItem(const Item &item,
                            const DynamicContext::Ptr &context)
        {
            QTextStream out(stderr);
            ++m_position;
            if(m_position == 1)
            {
                if(item)
                {
                    out << qPrintable(m_msg)
                        << " : "
                        << qPrintable(item.stringValue());
                }
                else
                {
                    out << qPrintable(m_msg)
                        << " : ("
                        << qPrintable(formatType(context->namePool(), CommonSequenceTypes::Empty))
                        << ")\n";
                    return Item();
                }
            }
            else
            {
                out << qPrintable(item.stringValue())
                    << '['
                    << m_position
                    << "]\n";
            }

            return item;
        }

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;
}

void ItemVerifier::verifyItem(const Item &item, const DynamicContext::Ptr &context) const
{
    if(m_reqType->itemMatches(item))
        return;

    context->error(QtXmlPatterns::tr("The item %1 did not match the required type %2.")
                                    .arg(formatData(item.stringValue()),
                                         formatType(context->namePool(), m_reqType)),
                   m_errorCode,
                   this);
}

void ComputedNamespaceConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
{
    const Item prefixItem(m_operand1->evaluateSingleton(context));
    const QString prefix(prefixItem ? prefixItem.stringValue() : QString());

    const Item namespaceItem(m_operand2->evaluateSingleton(context));
    const QString namespaceURI(namespaceItem ? namespaceItem.stringValue() : QString());

    if(namespaceURI.isEmpty())
    {
        context->error(QtXmlPatterns::tr("In a namespace constructor, the value for a namespace cannot be an empty string."),
                       ReportContext::XTDE0930,
                       this);
    }

    /* One optimization could be to store a pointer to
     * the name pool as a member in order to avoid the virtual call(s). */
    const NamePool::Ptr np(context->namePool());

    if(!prefix.isEmpty() && !QXmlUtils::isNCName(prefix))
    {
        context->error(QtXmlPatterns::tr("The prefix must be a valid %1, which %2 is not.")
                                        .arg(formatType(np, BuiltinTypes::xsNCName),
                                             formatKeyword(prefix)),
                       ReportContext::XTDE0920,
                       this);
    }
    const QXmlName binding(np->allocateBinding(prefix, namespaceURI));

    AnyURI::toQUrl<ReportContext::XTDE0905, DynamicContext::Ptr>(namespaceURI,
                                                                 context,
                                                                 this);

    if(binding.prefix() == StandardPrefixes::xmlns)
    {
        context->error(QtXmlPatterns::tr("The prefix %1 cannot be bound.")
                                        .arg(formatKeyword(prefix)),
                       ReportContext::XTDE0920,
                       this);
    }

    if((binding.prefix() == StandardPrefixes::xml && binding.namespaceURI() != StandardNamespaces::xml)
       ||
       (binding.prefix() != StandardPrefixes::xml && binding.namespaceURI() == StandardNamespaces::xml))
    {
        context->error(QtXmlPatterns::tr("Only the prefix %1 can be bound to %2 and vice versa.")
                                        .arg(formatKeyword(prefix), formatKeyword(namespaceURI)),
                       ReportContext::XTDE0925,
                       this);
    }

     context->outputReceiver()->namespaceBinding(binding);
}

Item QNameConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    Q_ASSERT(context);
    const QString lexQName(m_operand->evaluateSingleton(context).stringValue());

    const QXmlName expQName(expandQName<DynamicContext::Ptr,
                                        ReportContext::XQDY0074,
                                        ReportContext::XQDY0074>(lexQName,
                                                                 context,
                                                                 m_nsResolver,
                                                                 this));
    return toItem(QNameValue::fromValue(context->namePool(), expQName));
}

void ContextNodeChecker::checkTargetNode(const QXmlNodeModelIndex &node,
                                         const DynamicContext::Ptr &context,
                                         const ReportContext::ErrorCode code) const
{
    if(node.root().kind() != QXmlNodeModelIndex::Document)
    {
        context->error(QtXmlPatterns::tr("The root node of the second argument "
                                         "to function %1 must be a document "
                                         "node. %2 is not a document node.")
                       .arg(formatFunction(context->namePool(), signature()),
                            formatData(node)),
                       code, this);
    }
}

Item::Iterator::Ptr InScopePrefixesFN::evaluateSequence(const DynamicContext::Ptr &context) const
{
    const Item e(m_operands.first()->evaluateSingleton(context));

    const QVector<QXmlName> nbs(e.asNode().namespaceBindings());
    const int len = nbs.size();
    const NamePool::Ptr np(context->namePool());

    QList<Item> result;

    for(int i = 0; i < len; ++i)
        result.append(AtomicString::fromValue(np->stringForPrefix(nbs.at(i).prefix())));

    return makeListIterator(result);
}

Item LocalNameFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item node(m_operands.first()->evaluateSingleton(context));

    if(node)
    {
        const QXmlName name(node.asNode().name());

        if(name.isNull())
            return CommonValues::EmptyString;
        else
            return AtomicString::fromValue(context->namePool()->stringForLocalName(name.localName()));
    }
    else
        return CommonValues::EmptyString;
}

Item NodeNameFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item item(m_operands.first()->evaluateSingleton(context));

    if(item)
    {
        const QXmlName name(item.asNode().name());

        if(name.isNull())
            return Item();
        else
            return toItem(QNameValue::fromValue(context->namePool(), name));
    }
    else
        return Item();
}

Item ErrorFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    QString msg;

    switch(m_operands.count())
    {
        case 0: /* No args. */
        {
            context->error(QtXmlPatterns::tr("%1 was called.").arg(formatFunction(context->namePool(), signature())),
                            ReportContext::FOER0000, this);
            return Item();
        }
        case 3:
        /* Fallthrough, we don't use the 'error object' param. */
        case 2:
            msg = m_operands.at(1)->evaluateSingleton(context).stringValue();
        /* Fall through. */
        case 1:
        {
            const QNameValue::Ptr qName(m_operands.first()->evaluateSingleton(context).as<QNameValue>());

            if(qName)
                context->error(msg, qName->qName(), this);
            else
                context->error(msg, ReportContext::FOER0000, this);

            return Item();
        }
        default:
        {
            Q_ASSERT_X(false, Q_FUNC_INFO,
                       "Invalid number of arguments passed to fn:error.");
            return Item();
        }
    }
}

QXmlName ProcessingInstructionConstructor::evaluateTardata(const DynamicContext::Ptr &context) const
{
    const Item name(m_operand1->evaluateSingleton(context));
    return context->namePool()->allocateQName(QString(), name.stringValue());
}

DynamicContext::Ptr Template::createContext(const TemplateInvoker *const invoker,
                                            const DynamicContext::Ptr &context,
                                            const bool isCallTemplate) const
{
    Q_ASSERT(invoker);
    Q_ASSERT(context);

    /* We have:
     * - xsl:params in the target template (if any) which may provide
     *   default values.
     * - xsl:with-params in the caller (if any) which provides values.
     *
     * We need to, for each parameter:
     * - If the called template provides no default value and the caller
     *   has no value, it's an error
     * - If the called template has a default value and the caller provides
     *   none, it should be used
     * - In any case the caller provides a value, it needs to be used.
     *
     * Problems to look out for:
     *
     * - Each xsl:param is in scope for the subsequent xsl:params. Hence,
     *   the evaluation of one xsl:param can depend on another xsl:param,
     *   and so on
     * - The focus for xsl:params is different from the focus for
     *   the xsl:with-params
     * - The xsl:with-params are not in scope for the xsl:params.
     */

    WithParam::Hash withParams(invoker->withParams());

    /**
     * Parameters or not, we must in any case create a new stack frame
     * for the template invocation since otherwise we will trash our existing
     * variables. Hence it's as with calling user functions.
     *
     * This is especially reproducible with recursive functions.
     */
    DynamicContext::Ptr newStack(context->createStack());

    /* We have no parameters, and we have no further error checking to
     * do in the case of not being xsl:apply-templates, so we need to do nothing. */
    if(templateParameters.isEmpty() && (!isCallTemplate || withParams.isEmpty()))
        return newStack;

    const DynamicContext::TemplateParameterHash hashedParams(parametersAsHash());
    DynamicContext::TemplateParameterHash sewnTogether(hashedParams);

    const DynamicContext::TemplateParameterHash::iterator end(sewnTogether.end());

    for(DynamicContext::TemplateParameterHash::iterator it(sewnTogether.begin());
        it != end;
        ++it)
    {
        Expression::Ptr &param = it.value();

        WithParam::Ptr &withParam = withParams[it.key()];

        if(withParam)
            param = Expression::Ptr(new DynamicContextStore(withParam->sourceExpression(), context));
        else if(!param)
        {
            /* Ops, no xsl:with-param and no default value to cover up for it.
             */
            context->error(QtXmlPatterns::tr("The parameter %1 is required, but no corresponding %2 is supplied.")
                                             .arg(formatKeyword(context->namePool(), it.key()),
                                                  formatKeyword(QLatin1String("xsl:with-param"))),
                           ReportContext::XTSE0690,
                           this);
        }
    }

    if(isCallTemplate)
    {
        /* Find xsl:with-param that has no corresponding xsl:param. */
        /* Optimization: candidate for threading? */

        const WithParam::Hash::const_iterator end(withParams.constEnd());

        for(WithParam::Hash::const_iterator it(withParams.constBegin()); it != end; ++it)
        {
            if(!hashedParams.contains(it.key()))
                raiseXTSE0680(context, it.key(), this);
        }

    }

    newStack->templateParameterStore() = sewnTogether;
    return newStack;
}