properties.hxx

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#ifndef INCLUDED_SVX_SDR_PROPERTIES_PROPERTIES_HXX
#define INCLUDED_SVX_SDR_PROPERTIES_PROPERTIES_HXX

#include <sal/config.h>

#include <memory>

#include <sal/types.h>
#include <svx/svxdllapi.h>
#include <svl/typedwhich.hxx>

struct _xmlTextWriter;
typedef struct _xmlTextWriter* xmlTextWriterPtr;
class SdrObject;
class SfxItemSet;
class SfxPoolItem;
class SfxStyleSheet;
class Fraction;
class SfxItemPool;
class SdrModel;

namespace sdr::properties
{
    class ItemChangeBroadcaster;
}


//
//  BaseProperties
//      DefaultProperties                   ->SfxItemSet
//          AttributeProperties             ->SfxStyleSheet
//              E3dProperties
//                  E3dCompoundProperties
//                      E3dExtrudeProperties
//                      E3dLatheProperties
//                      E3dSphereProperties
//                  E3dSceneProperties
//              TextProperties              ->maVersion
//                  ConnectorProperties
//                  CustomShapeProperties
//                  MeasureProperties
//                  RectangleProperties
//                      CaptionProperties
//                      CircleProperties
//                      GraphicProperties
//                      OleProperties
//                  CellProperties
//                  TableProperties
//          GroupProperties
//      EmptyProperties
//          PageProperties

namespace sdr::properties
    {
        class SVXCORE_DLLPUBLIC BaseProperties
        {
        private:
            // the owner of this Properties. Set from constructor and not
            // to be changed in any way.
            SdrObject&                                      mrObject;

        protected:
            // apply the correct SfyStyleSheet from SdrObject's SdrModel
            virtual void applyDefaultStyleSheetFromSdrModel();

            // create a new object specific itemset with object specific ranges.
            virtual SfxItemSet CreateObjectSpecificItemSet(SfxItemPool& pPool) = 0;

            // internal access to SdrObject
            const SdrObject& GetSdrObject() const;

            SdrObject& GetSdrObject();

            // Test changeability for a single item. If an implementation wants to prevent
            // changing an item it should override this method.
            virtual bool AllowItemChange(const sal_uInt16 nWhich, const SfxPoolItem* pNewItem = nullptr) const = 0;

            // Do the internal ItemChange. If only nWhich is given, the item needs to be cleared.
            // Also needs to handle if nWhich and pNewItem is 0, which means to clear all items.
            virtual void ItemChange(const sal_uInt16 nWhich, const SfxPoolItem* pNewItem = nullptr) = 0;

            // Called after ItemChange() is done for all items. Allows local reactions on
            // specific item changes
            virtual void PostItemChange(const sal_uInt16 nWhich) = 0;

            // Internally react on ItemSet changes. The given ItemSet contains all changed items, the new ones.
            virtual void ItemSetChanged(const SfxItemSet*) = 0;
            // Subclasses need to return true if they want the ItemSetChanged() callback to actually have a non-zero pointer.
            // We do this because creating the temporary item set is expensive and seldom used.
            virtual bool WantItemSetInItemSetChanged() const { return false; }

        public:
            // basic constructor, used from SdrObject.
            explicit BaseProperties(SdrObject& rObj);

            // destructor
            virtual ~BaseProperties();

            // Clone() operator, normally just calls the local copy constructor,
            // see above.
            virtual std::unique_ptr<BaseProperties> Clone(SdrObject& rObj) const = 0;

            // Get the local ItemSet. This directly returns the local ItemSet of the object. No
            // merging of ItemSets is done for e.g. Group objects.
            virtual const SfxItemSet& GetObjectItemSet() const = 0;

            // get merged ItemSet. Normally, this maps directly to GetObjectItemSet(), but may
            // be overridden e.g for group objects to return a merged ItemSet of the object.
            // When using this method the returned ItemSet may contain items in the state
            // SfxItemState::DONTCARE which means there were several such items with different
            // values.
            virtual const SfxItemSet& GetMergedItemSet() const;

            // Sets all items which are on state SfxItemState::SET in rSet at the local ItemSet.
            // Uses AllowItemChange(), ItemChange(), PostItemChange() and ItemSetChanged() calls.
            virtual void SetObjectItemSet(const SfxItemSet& rSet) = 0;

            // Set merged ItemSet. Normally, this maps to SetObjectItemSet().
            virtual void SetMergedItemSet(const SfxItemSet& rSet, bool bClearAllItems = false);

            // Set single item at the local ItemSet. Uses AllowItemChange(),
            // ItemChange(), PostItemChange() and ItemSetChanged() calls.
            virtual void SetObjectItem(const SfxPoolItem& rItem) = 0;

            // Set a single item direct. Only uses AllowItemChange() and ItemChange(),
            // but not PostItemChange() and ItemSetChanged() calls.
            virtual void SetObjectItemDirect(const SfxPoolItem& rItem) = 0;

            // Clear a single local item. Uses AllowItemChange(),
            // ItemChange(), PostItemChange() and ItemSetChanged() calls.
            virtual void ClearObjectItem(const sal_uInt16 nWhich = 0) = 0;

            // Set a single item, iterate over hierarchies if necessary. Default
            // Implementation falls back to ClearObjectItem().
            virtual void SetMergedItem(const SfxPoolItem& rItem);

            // Clear a single item, iterate over hierarchies if necessary. Default
            // Implementation falls back to ClearObjectItem().
            virtual void ClearMergedItem(const sal_uInt16 nWhich);

            // Clear single item direct. Only uses AllowItemChange() and ItemChange(),
            // but not PostItemChange() and ItemSetChanged() calls.
            // Also supports complete deletion of items when default parameter 0 is used.
            virtual void ClearObjectItemDirect(const sal_uInt16 nWhich) = 0;

            // Set a new StyleSheet. Registers as listener at the StyleSheet to get knowledge
            // of StyleSheet changes.
            virtual void SetStyleSheet(SfxStyleSheet* pNewStyleSheet, bool bDontRemoveHardAttr) = 0;

            // Get the installed StyleSheet.
            virtual SfxStyleSheet* GetStyleSheet() const = 0;

            // force all attributes which come from styles to hard attributes
            // to be able to live without the style.
            virtual void ForceStyleToHardAttributes();

            // syntactical sugar for ItemSet accesses. Broadcasts before and after the changes
            // to invalidate views in old and new BoundRects. As soon as the repaint mechanism
            // will be changed these broadcasts will no longer be needed.
            //void SetItemAndBroadcast(const SfxPoolItem& rItem);
            //void ClearItemAndBroadcast(const sal_uInt16 nWhich = 0);
            void SetMergedItemSetAndBroadcast(const SfxItemSet& rSet, bool bClearAllItems = false);

            // Just a convenient shortcut for GetObjectItemSet().Get(nWhich).
            const SfxPoolItem& GetItem(const sal_uInt16 nWhich) const;
            template<class T> const T& GetItem(TypedWhichId<T> nWhich) const
            {
                return static_cast<const T&>(GetItem(sal_uInt16(nWhich)));
            }

            // support for convenient broadcasting. Used from SetMergedItemAndBroadcast(),
            // ClearItemAndBroadcast() and SetItemSetAndBroadcast(), see above.
            // But also from inside SdrObjects.
            void BroadcastItemChange(const ItemChangeBroadcaster& rChange);

            // #i101556# add versioning mechanism; used from e.g. text attribute set to
            // allow detection of e.g. style sheet or single text attribute changes. The
            // default implementation returns 0 (zero)
            virtual sal_uInt32 getVersion() const;

            virtual void dumpAsXml(xmlTextWriterPtr pWriter) const;
        };

        // checks the FillStyle item and removes unneeded Gradient, FillBitmap and Hatch items
        void SVXCORE_DLLPUBLIC CleanupFillProperties( SfxItemSet& rItemSet );

} // end of namespace sdr::properties

#endif // INCLUDED_SVX_SDR_PROPERTIES_PROPERTIES_HXX

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