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Diffstat (limited to 'src/declarative/qml/qdeclarativescarceresourcescriptclass_p.h')
| -rw-r--r-- | src/declarative/qml/qdeclarativescarceresourcescriptclass_p.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/src/declarative/qml/qdeclarativescarceresourcescriptclass_p.h b/src/declarative/qml/qdeclarativescarceresourcescriptclass_p.h deleted file mode 100644 index 2a1390a230..0000000000 --- a/src/declarative/qml/qdeclarativescarceresourcescriptclass_p.h +++ /dev/null @@ -1,163 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef QDECLARATIVESCARCERESOURCESCRIPTCLASS_P_H -#define QDECLARATIVESCARCERESOURCESCRIPTCLASS_P_H - -// -// W A R N I N G -// ------------- -// -// This file is not part of the Qt API. It exists purely as an -// implementation detail. This header file may change from version to -// version without notice, or even be removed. -// -// We mean it. -// - -#include "private/qdeclarativepropertycache_p.h" -#include "private/qdeclarativetypenamecache_p.h" - -#include <private/qscriptdeclarativeclass_p.h> -#include <QtScript/qscriptengine.h> - -QT_BEGIN_NAMESPACE - -class QDeclarativeEngine; - -/* - Scarce resources (like pixmaps and textures) are managed manually - in that the variant will be set to the invalid variant once the - JavaScript engine has finished using the JavaScript object whose - instance data is the ScarceResourceData (but before the garbage - collector frees the JavaScript object itself). - - The engine stores a doubly-linked-list of scarce resources which - will to be cleaned up after a binding is successfully evaluated - (unless the user explicitly preserves the scarce resource). - - A ScarceResourceData pointer should not be deleted manually, as - all instances of a ScarceResourceData should be owned by the - JavaScript engine. - */ -struct ScarceResourceData : public QScriptDeclarativeClass::Object { - ScarceResourceData(const QVariant &v) : resource(v), prev(0), next(0) - { - } - - virtual ~ScarceResourceData() - { - releaseResource(); - } - - // Insert this resource into the given list of resources. - void insertInto(ScarceResourceData **list) - { - // This node becomes the head of the list. - next = *list; // so our next = old list head - *list = this; // list now points to us (we're the head) - prev = list; // as we're the head, our prev ptr becomes the list ptr. - - // and the next node's prev pointer must contain a ptr to our next ptr, - // since per definition, prev always contains a pointer to the previous node's "next" ptr, - // and the "this" node is the "this->next" node's "prev" node. - if (next) next->prev = &next; - } - - // Remove this resource from the list of resources, without releasing the resource. - void removeNode() - { - // whatever previously pointed to this node (ie, as that node's "next" node) - // should now point to our next node (since we no longer exist in the list). - // and the next node's prev ptr should point to our prev node. - if (prev) *prev = next; - if (next) next->prev = prev; - prev = 0; - next = 0; - } - - // Release this resource, and remove from the list. - void releaseResource() - { - resource = QVariant(); - removeNode(); - } - - QVariant resource; - - // prev always contains a pointer to the previous node's "next" ptr. - // :. for the head node, [*prev] will be engine->scarceResources - // :. for every other node, [*prev] will be the previous node's "next" ptr. - ScarceResourceData **prev; - ScarceResourceData *next; -}; - -class Q_AUTOTEST_EXPORT QDeclarativeScarceResourceScriptClass : public QScriptDeclarativeClass -{ -public: - QDeclarativeScarceResourceScriptClass(QDeclarativeEngine *); - ~QDeclarativeScarceResourceScriptClass(); - - // Creates a new JavaScript object whose instance data is the scarce resource v - QScriptValue newScarceResource(const QVariant &v); - - // inherited from QScriptDeclarativeClass - virtual QScriptClass::QueryFlags queryProperty(Object *, const Identifier &, - QScriptClass::QueryFlags flags); - virtual Value property(Object *, const Identifier &); - virtual QVariant toVariant(Object *, bool *ok = 0); - QVariant toVariant(const QScriptValue &value); - -private: - PersistentIdentifier m_preserveId; - PersistentIdentifier m_destroyId; - QScriptValue m_preserve; - QScriptValue m_destroy; - - static QScriptValue preserve(QScriptContext *context, QScriptEngine *engine); - static QScriptValue destroy(QScriptContext *context, QScriptEngine *engine); - - QDeclarativeEngine *engine; -}; - -QT_END_NAMESPACE - -#endif // QDECLARATIVESCARCERESOURCESCRIPTCLASS_P_H |