1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 2.1 or version 3 as published by the Free 20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22 ** following information to ensure the GNU Lesser General Public License 23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25 ** 26 ** As a special exception, The Qt Company gives you certain additional 27 ** rights. These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** GNU General Public License Usage 31 ** Alternatively, this file may be used under the terms of the GNU 32 ** General Public License version 3.0 as published by the Free Software 33 ** Foundation and appearing in the file LICENSE.GPL included in the 34 ** packaging of this file. Please review the following information to 35 ** ensure the GNU General Public License version 3.0 requirements will be 36 ** met: http://www.gnu.org/copyleft/gpl.html. 37 ** 38 ** $QT_END_LICENSE$ 39 ** 40 ****************************************************************************/ 41 42 #include "qcommonsequencetypes_p.h" 43 #include "qatomicstring_p.h" 44 45 #include "qsimplecontentconstructor_p.h" 46 47 QT_BEGIN_NAMESPACE 48 49 using namespace QPatternist; 50 SimpleContentConstructor(const Expression::Ptr & operand)51SimpleContentConstructor::SimpleContentConstructor(const Expression::Ptr &operand) : SingleContainer(operand) 52 { 53 } 54 evaluateSingleton(const DynamicContext::Ptr & context) const55Item SimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const 56 { 57 const Item::Iterator::Ptr it(m_operand->evaluateSequence(context)); 58 Item next(it->next()); 59 QString result; 60 61 if(next) 62 { 63 result = next.stringValue(); 64 next = it->next(); 65 } 66 else 67 return Item(); 68 69 while(next) 70 { 71 result += QLatin1Char(' '); 72 result += next.stringValue(); 73 next = it->next(); 74 } 75 76 return AtomicString::fromValue(result); 77 } 78 compress(const StaticContext::Ptr & context)79Expression::Ptr SimpleContentConstructor::compress(const StaticContext::Ptr &context) 80 { 81 const Expression::Ptr me(SingleContainer::compress(context)); 82 83 if(me.data() == this) 84 { 85 /* Optimization: if we will evaluate to a single string, we're not 86 * necessary. */ 87 if(CommonSequenceTypes::ExactlyOneString->matches(m_operand->staticType())) 88 return m_operand; 89 } 90 91 return me; 92 } 93 expectedOperandTypes() const94SequenceType::List SimpleContentConstructor::expectedOperandTypes() const 95 { 96 SequenceType::List result; 97 result.append(CommonSequenceTypes::ZeroOrMoreAtomicTypes); 98 return result; 99 } 100 staticType() const101SequenceType::Ptr SimpleContentConstructor::staticType() const 102 { 103 if(m_operand->staticType()->cardinality().allowsEmpty()) 104 return CommonSequenceTypes::ZeroOrOneString; 105 else 106 return CommonSequenceTypes::ExactlyOneString; 107 } 108 accept(const ExpressionVisitor::Ptr & visitor) const109ExpressionVisitorResult::Ptr SimpleContentConstructor::accept(const ExpressionVisitor::Ptr &visitor) const 110 { 111 return visitor->visit(this); 112 } 113 114 QT_END_NAMESPACE 115