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+/****************************************************************************
+**
+** 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 Qt Designer 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of Qt Designer.  This header
+// file may change from version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QDESIGNER_PROPERTYCOMMAND_H
+#define QDESIGNER_PROPERTYCOMMAND_H
+
+#include "qdesigner_formwindowcommand_p.h"
+
+#include <QtCore/QVariant>
+#include <QtCore/QList>
+#include <QtCore/QPair>
+#include <QtCore/QSharedPointer>
+
+QT_BEGIN_NAMESPACE
+
+class QDesignerFormWindowInterface;
+class QDesignerPropertySheetExtension;
+
+namespace qdesigner_internal {
+
+class QDesignerIntegration;
+
+enum SpecialProperty {
+        SP_None, SP_ObjectName, SP_LayoutName, SP_SpacerName,SP_WindowTitle,
+        SP_MinimumSize, SP_MaximumSize, SP_Geometry, SP_Icon, SP_CurrentTabName, SP_CurrentItemName, SP_CurrentPageName,
+        SP_AutoDefault, SP_Alignment, SP_Shortcut, SP_Orientation
+};
+
+//Determine special property
+enum SpecialProperty getSpecialProperty(const QString& propertyName);
+
+// A helper class for applying properties to objects.
+// Can be used for Set commands (setValue(), restoreOldValue()) or
+// Reset Commands     restoreDefaultValue(), restoreOldValue()).
+//
+class QDESIGNER_SHARED_EXPORT PropertyHelper {
+    Q_DISABLE_COPY(PropertyHelper)
+public:
+    // A pair of Value and changed flag
+    typedef QPair<QVariant, bool> Value;
+
+    enum ObjectType {OT_Object, OT_FreeAction, OT_AssociatedAction, OT_Widget};
+
+    PropertyHelper(QObject* object,
+                   SpecialProperty specialProperty,
+                   QDesignerPropertySheetExtension *sheet,
+                   int index);
+    virtual ~PropertyHelper() {}
+
+    QObject *object() const { return m_object; }
+    SpecialProperty specialProperty() const { return m_specialProperty; }
+    // set a new value. Can be overwritten to perform a transformation (see
+    // handling of Arrow key move in FormWindow class).
+    virtual Value setValue(QDesignerFormWindowInterface *fw, const QVariant &value, bool changed, unsigned subPropertyMask);
+
+    // restore old value
+    Value restoreOldValue(QDesignerFormWindowInterface *fw);
+    // set default value
+    Value restoreDefaultValue(QDesignerFormWindowInterface *fw);
+
+    inline QVariant oldValue() const
+    { return m_oldValue.first; }
+
+    inline void setOldValue(const QVariant &oldValue)
+    { m_oldValue.first = oldValue; }
+
+    // required updates for this property (bit mask)
+    enum UpdateMask { UpdatePropertyEditor=1, UpdateObjectInspector=2 };
+    unsigned updateMask() const;
+
+    // can be merged into one command (that is, object and name match)
+    bool canMerge(const PropertyHelper &other) const;
+    QDesignerIntegration *integration(QDesignerFormWindowInterface *fw) const;
+
+    static void triggerActionChanged(QAction *a);
+
+private:
+    // Apply the value and update. Returns corrected value
+    Value applyValue(QDesignerFormWindowInterface *fw, const QVariant &oldValue, Value newValue);
+
+    static void checkApplyWidgetValue(QDesignerFormWindowInterface *fw, QWidget* w,
+                                      SpecialProperty specialProperty, QVariant &v);
+
+    void updateObject(QDesignerFormWindowInterface *fw, const QVariant &oldValue, const QVariant &newValue);
+    QVariant findDefaultValue(QDesignerFormWindowInterface *fw) const;
+    void ensureUniqueObjectName(QDesignerFormWindowInterface *fw, QObject *object) const;
+    SpecialProperty m_specialProperty;
+
+    QPointer<QObject> m_object;
+    ObjectType m_objectType;
+    QPointer<QWidget> m_parentWidget;
+
+    QDesignerPropertySheetExtension *m_propertySheet;
+    int m_index;
+
+    Value m_oldValue;
+};
+
+// Base class for commands that can be applied to several widgets
+
+class QDESIGNER_SHARED_EXPORT PropertyListCommand : public QDesignerFormWindowCommand {
+public:
+    typedef QList<QObject *> ObjectList;
+
+    explicit PropertyListCommand(QDesignerFormWindowInterface *formWindow, QUndoCommand *parent = 0);
+
+    QObject* object(int index = 0) const;
+
+    QVariant oldValue(int index = 0) const;
+
+    void setOldValue(const QVariant &oldValue, int index = 0);
+
+    // Calls restoreDefaultValue() and update()
+    virtual void undo();
+
+protected:
+    typedef QSharedPointer<PropertyHelper> PropertyHelperPtr;
+    typedef QList<PropertyHelperPtr> PropertyHelperList;
+
+    // add an object
+    bool add(QObject *object, const QString &propertyName);
+
+    // Init from a list and make sure referenceObject is added first to obtain the right property group
+    bool initList(const ObjectList &list, const QString &apropertyName, QObject *referenceObject = 0);
+
+    // set a new value, return update mask
+    unsigned setValue(QVariant value, bool changed, unsigned subPropertyMask);
+
+    // restore old value,  return update mask
+    unsigned  restoreOldValue();
+    // set default value,  return update mask
+    unsigned  restoreDefaultValue();
+
+    // update designer
+    void update(unsigned updateMask);
+
+    // check if lists are aequivalent for command merging (same widgets and props)
+    bool canMergeLists(const PropertyHelperList& other) const;
+
+    PropertyHelperList& propertyHelperList() { return m_propertyHelperList; }
+    const PropertyHelperList& propertyHelperList() const { return m_propertyHelperList; }
+
+    const QString propertyName() const;
+    SpecialProperty specialProperty() const;
+
+    // Helper struct describing a property used for checking whether
+    // properties of different widgets are equivalent
+    struct PropertyDescription {
+    public:
+        PropertyDescription();
+        PropertyDescription(const QString &propertyName, QDesignerPropertySheetExtension *propertySheet, int index);
+        bool equals(const PropertyDescription &p) const;
+        void debug() const;
+
+        QString m_propertyName;
+        QString m_propertyGroup;
+        QVariant::Type m_propertyType;
+        SpecialProperty m_specialProperty;
+    };
+    const PropertyDescription &propertyDescription() const { return  m_propertyDescription; }
+
+protected:
+    virtual PropertyHelper *createPropertyHelper(QObject *o, SpecialProperty sp,
+                                                 QDesignerPropertySheetExtension *sheet, int sheetIndex) const;
+
+private:
+    PropertyDescription m_propertyDescription;
+    PropertyHelperList m_propertyHelperList;
+};
+
+class QDESIGNER_SHARED_EXPORT SetPropertyCommand: public PropertyListCommand
+{
+
+public:
+    typedef QList<QObject *> ObjectList;
+
+    explicit SetPropertyCommand(QDesignerFormWindowInterface *formWindow, QUndoCommand *parent = 0);
+
+    bool init(QObject *object, const QString &propertyName, const QVariant &newValue);
+    bool init(const ObjectList &list, const QString &propertyName, const QVariant &newValue,
+              QObject *referenceObject = 0, bool enableSubPropertyHandling = true);
+
+
+    inline QVariant newValue() const
+    { return m_newValue; }
+
+    inline void setNewValue(const QVariant &newValue)
+    { m_newValue = newValue; }
+
+    int id() const;
+    bool mergeWith(const QUndoCommand *other);
+
+    virtual void redo();
+
+protected:
+    virtual QVariant mergeValue(const QVariant &newValue);
+
+private:
+    unsigned subPropertyMask(const QVariant &newValue, QObject *referenceObject);
+    void setDescription();
+    QVariant m_newValue;
+    unsigned m_subPropertyMask;
+};
+
+class QDESIGNER_SHARED_EXPORT ResetPropertyCommand: public PropertyListCommand
+{
+
+public:
+    typedef QList<QObject *> ObjectList;
+
+    explicit ResetPropertyCommand(QDesignerFormWindowInterface *formWindow);
+
+    bool init(QObject *object, const QString &propertyName);
+    bool init(const ObjectList &list, const QString &propertyName, QObject *referenceObject = 0);
+
+    virtual void redo();
+
+protected:
+    virtual bool mergeWith(const QUndoCommand *) { return false; }
+
+private:
+    void setDescription();
+    QString m_propertyName;
+};
+
+
+class QDESIGNER_SHARED_EXPORT AddDynamicPropertyCommand: public QDesignerFormWindowCommand
+{
+
+public:
+    explicit AddDynamicPropertyCommand(QDesignerFormWindowInterface *formWindow);
+
+    bool init(const QList<QObject *> &selection, QObject *current, const QString &propertyName, const QVariant &value);
+
+    virtual void redo();
+    virtual void undo();
+private:
+    void setDescription();
+    QString m_propertyName;
+    QList<QObject *> m_selection;
+    QVariant m_value;
+};
+
+class QDESIGNER_SHARED_EXPORT RemoveDynamicPropertyCommand: public QDesignerFormWindowCommand
+{
+
+public:
+    explicit RemoveDynamicPropertyCommand(QDesignerFormWindowInterface *formWindow);
+
+    bool init(const QList<QObject *> &selection, QObject *current, const QString &propertyName);
+
+    virtual void redo();
+    virtual void undo();
+private:
+    void setDescription();
+    QString m_propertyName;
+    QMap<QObject *, QPair<QVariant, bool> > m_objectToValueAndChanged;
+};
+
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE
+
+#endif // QDESIGNER_PROPERTYCOMMAND_H