| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** General Public License version 3 as published by the Free Software |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #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 |