1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://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 https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://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 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #include "qcommonsequencetypes_p.h" 41 #include "qatomicstring_p.h" 42 43 #include "qsimplecontentconstructor_p.h" 44 45 QT_BEGIN_NAMESPACE 46 47 using namespace QPatternist; 48 SimpleContentConstructor(const Expression::Ptr & operand)49SimpleContentConstructor::SimpleContentConstructor(const Expression::Ptr &operand) : SingleContainer(operand) 50 { 51 } 52 evaluateSingleton(const DynamicContext::Ptr & context) const53Item SimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const 54 { 55 const Item::Iterator::Ptr it(m_operand->evaluateSequence(context)); 56 Item next(it->next()); 57 QString result; 58 59 if(next) 60 { 61 result = next.stringValue(); 62 next = it->next(); 63 } 64 else 65 return Item(); 66 67 while(next) 68 { 69 result += QLatin1Char(' '); 70 result += next.stringValue(); 71 next = it->next(); 72 } 73 74 return AtomicString::fromValue(result); 75 } 76 compress(const StaticContext::Ptr & context)77Expression::Ptr SimpleContentConstructor::compress(const StaticContext::Ptr &context) 78 { 79 const Expression::Ptr me(SingleContainer::compress(context)); 80 81 if(me.data() == this) 82 { 83 /* Optimization: if we will evaluate to a single string, we're not 84 * necessary. */ 85 if(CommonSequenceTypes::ExactlyOneString->matches(m_operand->staticType())) 86 return m_operand; 87 } 88 89 return me; 90 } 91 expectedOperandTypes() const92SequenceType::List SimpleContentConstructor::expectedOperandTypes() const 93 { 94 SequenceType::List result; 95 result.append(CommonSequenceTypes::ZeroOrMoreAtomicTypes); 96 return result; 97 } 98 staticType() const99SequenceType::Ptr SimpleContentConstructor::staticType() const 100 { 101 if(m_operand->staticType()->cardinality().allowsEmpty()) 102 return CommonSequenceTypes::ZeroOrOneString; 103 else 104 return CommonSequenceTypes::ExactlyOneString; 105 } 106 accept(const ExpressionVisitor::Ptr & visitor) const107ExpressionVisitorResult::Ptr SimpleContentConstructor::accept(const ExpressionVisitor::Ptr &visitor) const 108 { 109 return visitor->visit(this); 110 } 111 112 QT_END_NAMESPACE 113