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Diffstat (limited to 'src/xmlpatterns/expr/qcurrentitemstore.cpp')
-rw-r--r-- | src/xmlpatterns/expr/qcurrentitemstore.cpp | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qcurrentitemstore.cpp b/src/xmlpatterns/expr/qcurrentitemstore.cpp new file mode 100644 index 0000000..0bfab8b --- /dev/null +++ b/src/xmlpatterns/expr/qcurrentitemstore.cpp @@ -0,0 +1,139 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtXmlPatterns module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qbuiltintypes_p.h" +#include "qcommonsequencetypes_p.h" +#include "qcurrentitemcontext_p.h" +#include "qstaticcurrentcontext_p.h" + +#include "qcurrentitemstore_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +CurrentItemStore::CurrentItemStore(const Expression::Ptr &operand) : SingleContainer(operand) +{ +} + +DynamicContext::Ptr CurrentItemStore::createContext(const DynamicContext::Ptr &old) const +{ + return DynamicContext::Ptr(new CurrentItemContext(old->contextItem(), old)); +} + +bool CurrentItemStore::evaluateEBV(const DynamicContext::Ptr &context) const +{ + return m_operand->evaluateEBV(createContext(context)); +} + +Item::Iterator::Ptr CurrentItemStore::evaluateSequence(const DynamicContext::Ptr &context) const +{ + return m_operand->evaluateSequence(createContext(context)); +} + +Item CurrentItemStore::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + return m_operand->evaluateSingleton(createContext(context)); +} + +SequenceType::Ptr CurrentItemStore::staticType() const +{ + return m_operand->staticType(); +} + +SequenceType::List CurrentItemStore::expectedOperandTypes() const +{ + SequenceType::List result; + result.append(CommonSequenceTypes::ZeroOrMoreItems); + return result; +} + +StaticContext::Ptr CurrentItemStore::newStaticContext(const StaticContext::Ptr &context) +{ + /* It might be we are generated despite there is no focus. In that case + * an error will reported in case current() is used, but in any case we cannot + * crash, so use item() in case we have no focus. + * + * Such a case is when we're inside a named template, and it's invoked + * without focus. */ + const ItemType::Ptr t(context->contextItemType()); + return StaticContext::Ptr(new StaticCurrentContext(t ? t : BuiltinTypes::item, context)); +} + +Expression::Ptr CurrentItemStore::compress(const StaticContext::Ptr &context) +{ + const Expression::Ptr me(SingleContainer::compress(newStaticContext(context))); + + if(me != this) + return me; + else + { + /* If fn:current() isn't called, there's no point in us sticking + * around. */ + if(m_operand->deepProperties().testFlag(RequiresCurrentItem)) + return me; + else + return m_operand; + } +} + +Expression::Ptr CurrentItemStore::typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType) +{ + return SingleContainer::typeCheck(newStaticContext(context), reqType); +} + +ExpressionVisitorResult::Ptr CurrentItemStore::accept(const ExpressionVisitor::Ptr &visitor) const +{ + return visitor->visit(this); +} + +const SourceLocationReflection *CurrentItemStore::actualReflection() const +{ + return m_operand->actualReflection(); +} + +Expression::Properties CurrentItemStore::properties() const +{ + return m_operand->properties() & (RequiresFocus | IsEvaluated | DisableElimination); +} + +QT_END_NAMESPACE |