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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtSCriptTools module of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "qscriptobjectsnapshot_p.h"

    43 

    44 #include <QtCore/qmap.h>

    45 #include <QtCore/qset.h>

    46 #include <QtCore/qvector.h>

    47 #include <QtCore/qnumeric.h>

    48 #include <QtScript/qscriptvalueiterator.h>

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 QScriptObjectSnapshot::QScriptObjectSnapshot()

    53 {

    54 }

    55 

    56 QScriptObjectSnapshot::~QScriptObjectSnapshot()

    57 {

    58 }

    59 

    60 static bool _q_equal(const QScriptValue &v1, const QScriptValue &v2)

    61 {

    62     if (v1.strictlyEquals(v2))

    63         return true;

    64     if (v1.isNumber() && v2.isNumber() && qIsNaN(v1.toNumber()) && qIsNaN(v2.toNumber()))

    65         return true;

    66     return false;

    67 }

    68 

    69 QScriptObjectSnapshot::Delta QScriptObjectSnapshot::capture(const QScriptValue &object)

    70 {

    71     Delta result;

    72     QMap<QString, QScriptValueProperty> currProps;

    73     QHash<QString, int> propertyNameToIndex;

    74     {

    75         int i = 0;

    76         QScriptValueIterator it(object);

    77         while (it.hasNext()) {

    78             it.next();

    79             QScriptValueProperty prop(it.name(), it.value(), it.flags());

    80             currProps.insert(it.name(), prop);

    81             propertyNameToIndex.insert(it.name(), i);

    82             ++i;

    83         }

    84         if (object.prototype().isValid()) {

    85             QString __proto__ = QString::fromLatin1("__proto__");

    86             QScriptValueProperty protoProp(

    87                 __proto__, object.prototype(),

    88                 QScriptValue::Undeletable | QScriptValue::ReadOnly);

    89             currProps.insert(__proto__, protoProp);

    90             propertyNameToIndex.insert(__proto__, i);

    91             ++i;

    92         }

    93     }

    94 

    95     QSet<QString> prevSet;

    96     for (int i = 0; i < m_properties.size(); ++i)

    97         prevSet.insert(m_properties.at(i).name());

    98     QSet<QString> currSet = currProps.keys().toSet();

    99     QSet<QString> removedProperties = prevSet - currSet;

   100     QSet<QString> addedProperties = currSet - prevSet;

   101     QSet<QString> maybeChangedProperties = currSet & prevSet;

   102 

   103     {

   104         QMap<int, QScriptValueProperty> am;

   105         QSet<QString>::const_iterator it;

   106         for (it = addedProperties.constBegin(); it != addedProperties.constEnd(); ++it) {

   107             int idx = propertyNameToIndex[*it];

   108             am[idx] = currProps[*it];

   109         }

   110         result.addedProperties = am.values();

   111     }

   112 

   113     {

   114         QSet<QString>::const_iterator it;

   115         for (it = maybeChangedProperties.constBegin(); it != maybeChangedProperties.constEnd(); ++it) {

   116             const QScriptValueProperty &p1 = currProps[*it];

   117             const QScriptValueProperty &p2 = findProperty(*it);

   118             if (!_q_equal(p1.value(), p2.value())

   119                 || (p1.flags() != p2.flags())) {

   120                 result.changedProperties.append(p1);

   121             }

   122         }

   123     }

   124 

   125     result.removedProperties = removedProperties.toList();

   126 

   127     m_properties = currProps.values();

   128 

   129     return result;

   130 }

   131 

   132 QScriptValueProperty QScriptObjectSnapshot::findProperty(const QString &name) const

   133 {

   134     for (int i = 0; i < m_properties.size(); ++i) {

   135         if (m_properties.at(i).name() == name)

   136             return m_properties.at(i);

   137     }

   138     return QScriptValueProperty();

   139 }

   140 

   141 QScriptValuePropertyList QScriptObjectSnapshot::properties() const

   142 {

   143     return m_properties;

   144 }

   145 

   146 QT_END_NAMESPACE