src/scripttools/debugging/qscriptobjectsnapshot.cpp

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  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