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** This file is part of the QtXmlPatterns module of the Qt Toolkit. | |
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** GNU General Public License Usage | |
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#include "qcommonsequencetypes_p.h" | |
#include "qatomicstring_p.h" | |
#include "qsimplecontentconstructor_p.h" | |
QT_BEGIN_NAMESPACE | |
using namespace QPatternist; | |
SimpleContentConstructor::SimpleContentConstructor(const Expression::Ptr &operand) : SingleContainer(operand) | |
{ | |
} | |
Item SimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const | |
{ | |
const Item::Iterator::Ptr it(m_operand->evaluateSequence(context)); | |
Item next(it->next()); | |
QString result; | |
if(next) | |
{ | |
result = next.stringValue(); | |
next = it->next(); | |
} | |
else | |
return Item(); | |
while(next) | |
{ | |
result += QLatin1Char(' '); | |
result += next.stringValue(); | |
next = it->next(); | |
} | |
return AtomicString::fromValue(result); | |
} | |
Expression::Ptr SimpleContentConstructor::compress(const StaticContext::Ptr &context) | |
{ | |
const Expression::Ptr me(SingleContainer::compress(context)); | |
if(me.data() == this) | |
{ | |
/* Optimization: if we will evaluate to a single string, we're not | |
* necessary. */ | |
if(CommonSequenceTypes::ExactlyOneString->matches(m_operand->staticType())) | |
return m_operand; | |
} | |
return me; | |
} | |
SequenceType::List SimpleContentConstructor::expectedOperandTypes() const | |
{ | |
SequenceType::List result; | |
result.append(CommonSequenceTypes::ZeroOrMoreAtomicTypes); | |
return result; | |
} | |
SequenceType::Ptr SimpleContentConstructor::staticType() const | |
{ | |
if(m_operand->staticType()->cardinality().allowsEmpty()) | |
return CommonSequenceTypes::ZeroOrOneString; | |
else | |
return CommonSequenceTypes::ExactlyOneString; | |
} | |
ExpressionVisitorResult::Ptr SimpleContentConstructor::accept(const ExpressionVisitor::Ptr &visitor) const | |
{ | |
return visitor->visit(this); | |
} | |
QT_END_NAMESPACE |