src/declarative/qml/qdeclarativeaccessors.cpp

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  41
  42 #include "qdeclarativeaccessors_p.h"
  43
  44 #include "qdeclarativedata_p.h"
  45 #include "qdeclarativenotifier_p.h"
  46
  47 QT_BEGIN_NAMESPACE
  48
  49 struct AccessorProperties {
  50     AccessorProperties();
  51
  52     QReadWriteLock lock;
  53     QHash<const QMetaObject *, QDeclarativeAccessorProperties::Properties> properties;
  54 };
  55
  56 Q_GLOBAL_STATIC(AccessorProperties, accessorProperties)
  57
  58 QML_PRIVATE_ACCESSOR(QObject, QString, objectName, objectName)
  59
  60 static void QObject_objectNameNotifier(QObject *object, intptr_t, QDeclarativeNotifier **notifier)
  61 {
  62     *notifier = QDeclarativeData::get(object, true)->objectNameNotifier();
  63 }
  64
  65 static QDeclarativeAccessors QObject_objectName = { QObject_objectNameRead,
  66                                                     QObject_objectNameNotifier };
  67
  68 QML_DECLARE_PROPERTIES(QObject) {
  69     { QML_PROPERTY_NAME(objectName), 0, &QObject_objectName }
  70 };
  71
  72 static void buildNameMask(QDeclarativeAccessorProperties::Properties &properties)
  73 {
  74     quint32 mask = 0;
  75
  76     for (int ii = 0; ii < properties.count; ++ii) {
  77         Q_ASSERT(strlen(properties.properties[ii].name) == properties.properties[ii].nameLength);
  78         Q_ASSERT(properties.properties[ii].nameLength > 0);
  79
  80         mask |= (1 << qMin(31U, properties.properties[ii].nameLength - 1));
  81     }
  82
  83     properties.nameMask = mask;
  84 }
  85
  86 AccessorProperties::AccessorProperties()
  87 {
  88     // Pre-seed QObject::objectName accessor
  89     typedef QDeclarativeAccessorProperties::Properties P;
  90     properties.insert(&QObject::staticMetaObject,
  91                       P(qdeclarative_accessor_properties_QObject,
  92                         sizeof(qdeclarative_accessor_properties_QObject) /
  93                         sizeof(QDeclarativeAccessorProperties::Property)));
  94 }
  95
  96 QDeclarativeAccessorProperties::Properties::Properties(Property *properties, int count)
  97 : count(count), properties(properties)
  98 {
  99     buildNameMask(*this);
 100 }
 101
 102 QDeclarativeAccessorProperties::Properties
 103 QDeclarativeAccessorProperties::properties(const QMetaObject *mo)
 104 {
 105     AccessorProperties *This = accessorProperties();
 106
 107     QReadLocker lock(&This->lock);
 108     return This->properties.value(mo);
 109 }
 110
 111 void QDeclarativeAccessorProperties::registerProperties(const QMetaObject *mo, int count,
 112                                                         Property *props)
 113 {
 114     Q_ASSERT(count > 0);
 115
 116     Properties properties(props, count);
 117
 118     AccessorProperties *This = accessorProperties();
 119
 120     QWriteLocker lock(&This->lock);
 121
 122     Q_ASSERT(!This->properties.contains(mo) || This->properties.value(mo) == properties);
 123
 124     This->properties.insert(mo, properties);
 125 }
 126
 127 QT_END_NAMESPACE