[844] | 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the QtDeclarative module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at qt-info@nokia.com.
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "private/qdeclarativefastproperties_p.h"
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| 43 |
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| 44 | #include <private/qdeclarativeitem_p.h>
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| 45 |
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| 46 | QT_BEGIN_NAMESPACE
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| 47 |
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| 48 | // Adding entries to the QDeclarativeFastProperties class allows the QML
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| 49 | // binding optimizer to bypass Qt's meta system and read and, more
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| 50 | // importantly, subscribe to properties directly. Any property that is
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| 51 | // primarily read from bindings is a candidate for inclusion as a fast
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| 52 | // property.
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| 53 |
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| 54 | static void QObject_objectName(QObject *object, void *output, QDeclarativeNotifierEndpoint *endpoint)
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| 55 | {
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| 56 | if (endpoint)
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| 57 | endpoint->connect(QDeclarativeData::get(object, true)->objectNameNotifier());
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| 58 | *((QString *)output) = object->objectName();
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| 59 | }
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| 60 |
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| 61 | QDeclarativeFastProperties::QDeclarativeFastProperties()
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| 62 | {
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| 63 | add(&QDeclarativeItem::staticMetaObject, QDeclarativeItem::staticMetaObject.indexOfProperty("parent"),
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| 64 | QDeclarativeItemPrivate::parentProperty);
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| 65 | add(&QObject::staticMetaObject, QObject::staticMetaObject.indexOfProperty("objectName"),
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| 66 | QObject_objectName);
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| 67 | }
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| 68 |
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| 69 | int QDeclarativeFastProperties::accessorIndexForProperty(const QMetaObject *metaObject, int propertyIndex)
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| 70 | {
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| 71 | Q_ASSERT(metaObject);
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| 72 | Q_ASSERT(propertyIndex >= 0);
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| 73 |
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| 74 | // Find the "real" metaObject
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| 75 | while (metaObject->propertyOffset() > propertyIndex)
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| 76 | metaObject = metaObject->superClass();
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| 77 |
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| 78 | QHash<QPair<const QMetaObject *, int>, int>::Iterator iter =
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| 79 | m_index.find(qMakePair(metaObject, propertyIndex));
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| 80 | if (iter != m_index.end())
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| 81 | return *iter;
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| 82 | else
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| 83 | return -1;
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| 84 | }
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| 85 |
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| 86 | void QDeclarativeFastProperties::add(const QMetaObject *metaObject, int propertyIndex, Accessor accessor)
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| 87 | {
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| 88 | Q_ASSERT(metaObject);
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| 89 | Q_ASSERT(propertyIndex >= 0);
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| 90 |
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| 91 | // Find the "real" metaObject
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| 92 | while (metaObject->propertyOffset() > propertyIndex)
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| 93 | metaObject = metaObject->superClass();
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| 94 |
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| 95 | QPair<const QMetaObject *, int> data = qMakePair(metaObject, propertyIndex);
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| 96 | int accessorIndex = m_accessors.count();
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| 97 | m_accessors.append(accessor);
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| 98 | m_index.insert(data, accessorIndex);
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| 99 | }
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| 100 |
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| 101 | QT_END_NAMESPACE
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