qt/api/qscriptvalueiterator_p.h

   1 /*
   2     Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18 */
  19
  20 #ifndef qscriptvalueiterator_p_h
  21 #define qscriptvalueiterator_p_h
  22
  23 #include "qscriptvalue_p.h"
  24 #include <JavaScriptCore/JavaScript.h>
  25 #include <JavaScriptCore/JSRetainPtr.h>
  26 #include <QtCore/qshareddata.h>
  27 #include <QtCore/qvector.h>
  28
  29 class QScriptValueIteratorPrivate: public QSharedData {
  30 public:
  31     inline QScriptValueIteratorPrivate(const QScriptValuePrivate* value);
  32     inline ~QScriptValueIteratorPrivate();
  33
  34     inline bool hasNext();
  35     inline void next();
  36
  37     inline bool hasPrevious();
  38     inline void previous();
  39
  40     inline QString name() const;
  41     inline QScriptStringPrivate* scriptName() const;
  42
  43     inline QScriptValuePrivate* value() const;
  44     inline void setValue(const QScriptValuePrivate* value);
  45
  46     inline void remove();
  47
  48     inline void toFront();
  49     inline void toBack();
  50
  51     QScriptValue::PropertyFlags flags() const;
  52
  53     inline bool isValid() const;
  54 private:
  55     inline QScriptEnginePrivate* engine() const;
  56
  57     QExplicitlySharedDataPointer<QScriptValuePrivate> m_object;
  58     QVector<JSStringRef> m_names;
  59     QMutableVectorIterator<JSStringRef> m_idx;
  60 };
  61
  62 inline QScriptValueIteratorPrivate::QScriptValueIteratorPrivate(const QScriptValuePrivate* value)
  63     : m_object(const_cast<QScriptValuePrivate*>(value))
  64     , m_idx(m_names)
  65 {
  66     if (m_object->isObject()) {
  67         m_names = engine()->objectGetOwnPropertyNames(*m_object);
  68         m_idx = m_names;
  69     } else
  70         m_object = 0;
  71 }
  72
  73 inline QScriptValueIteratorPrivate::~QScriptValueIteratorPrivate()
  74 {
  75     QVector<JSStringRef>::const_iterator i = m_names.constBegin();
  76     for (; i != m_names.constEnd(); ++i)
  77         JSStringRelease(*i);
  78 }
  79
  80 inline bool QScriptValueIteratorPrivate::hasNext()
  81 {
  82     return m_idx.hasNext();
  83 }
  84
  85 inline void QScriptValueIteratorPrivate::next()
  86 {
  87     // FIXME (Qt5) This method should return a value (QTBUG-11226).
  88     m_idx.next();
  89 }
  90
  91 inline bool QScriptValueIteratorPrivate::hasPrevious()
  92 {
  93     return m_idx.hasPrevious();
  94 }
  95
  96 inline void QScriptValueIteratorPrivate::previous()
  97 {
  98     m_idx.previous();
  99 }
 100
 101 inline QString QScriptValueIteratorPrivate::name() const
 102 {
 103     if (!isValid())
 104         return QString();
 105     return QScriptConverter::toString(m_idx.value());
 106 }
 107
 108 inline QScriptStringPrivate* QScriptValueIteratorPrivate::scriptName() const
 109 {
 110     if (!isValid())
 111         return new QScriptStringPrivate();
 112     return new QScriptStringPrivate(QScriptConverter::toString(m_idx.value()));
 113 }
 114
 115 inline QScriptValuePrivate* QScriptValueIteratorPrivate::value() const
 116 {
 117     if (!isValid())
 118         return new QScriptValuePrivate();
 119     JSValueRef exception = 0;
 120     JSValueRef value = m_object->property(m_idx.value(), &exception);
 121     engine()->setException(exception);
 122     return new QScriptValuePrivate(engine(), value);
 123 }
 124
 125 inline void QScriptValueIteratorPrivate::setValue(const QScriptValuePrivate* value)
 126 {
 127     if (!isValid())
 128         return;
 129     JSValueRef exception = 0;
 130     m_object->setProperty(m_idx.value(), *value, /* flags */ 0, &exception);
 131     engine()->setException(exception);
 132 }
 133
 134 inline void QScriptValueIteratorPrivate::remove()
 135 {
 136     if (!isValid())
 137         return;
 138     JSValueRef exception = 0;
 139     m_object->deleteProperty(m_idx.value(), &exception);
 140     engine()->setException(exception);
 141     m_idx.remove();
 142 }
 143
 144 inline void QScriptValueIteratorPrivate::toFront()
 145 {
 146     m_idx.toFront();
 147 }
 148
 149 inline void QScriptValueIteratorPrivate::toBack()
 150 {
 151     m_idx.toBack();
 152 }
 153
 154 QScriptValue::PropertyFlags QScriptValueIteratorPrivate::flags() const
 155 {
 156     if (!isValid())
 157         return QScriptValue::PropertyFlags(0);
 158     return m_object->propertyFlags(m_idx.value(), QScriptValue::ResolveLocal);
 159 }
 160
 161 inline bool QScriptValueIteratorPrivate::isValid() const
 162 {
 163     return m_object;
 164 }
 165
 166 inline QScriptEnginePrivate* QScriptValueIteratorPrivate::engine() const
 167 {
 168     Q_ASSERT(isValid());
 169     return m_object->engine();
 170 }
 171
 172 #endif // qscriptvalueiterator_p_h