// $Id: undoop.h 751 2006-03-31 15:43:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ #ifndef INC_UNDOOP #define INC_UNDOOP #include "ops.h" #include "node.h" // for classas and AttachNodeDirection #include "pathtype.h" class NodeRenderableInk; class NodePath; class Path; class AttrBrushType; /******************************************************************************************** class ObjectItem: public ListItem Author: Simon_Maneggio (Xara Group Ltd) Created: 11/5/95 Purpose: ObjectItems are held in ObjectSets SeeAlso: ObjectSet SeeAlso: Node::AppliedAttrSet ********************************************************************************************/ class ObjectItem: public ListItem { public: NodeRenderableInk* pObject; }; /******************************************************************************************** > class ObjectSet: public List Author: Simon_Maneggio (Xara Group Ltd) Created: 15/5/95 Purpose: A set of NodeRenderableInk objects SeeAlso: ObjectItem ********************************************************************************************/ class ObjectSet: public List { public: // A function to return a copy of the ObjectSet ObjectSet* CopySet(); // A simple function to add attr types to the AppliedAttrSet (Chiecks for duplicates) virtual BOOL AddToSet(NodeRenderableInk* pObject); // A function to determine if pObject is in the set BOOL InSet(NodeRenderableInk* pObject); ~ObjectSet() { DeleteAll(); }; }; /******************************************************************************************** > class PreDelFactorOutInfoItem: public ListItem Author: Simon_Maneggio (Xara Group Ltd) Created: 31/5/95 Purpose: PreDelFactorOutInfoItems are used by the GetPreDelFactorOutInfo and DoFactorOutAfterDeletion functions. See these for a description of its purpose. SeeAlso: - ********************************************************************************************/ class PreDelFactorOutInfoItem: public ListItem { public: NodeRenderableInk* pCompound; AttrTypeSet AttrTypesToFactorOut; }; /******************************************************************************************** > class UndoableOperation: public Operation Author: Simon_Maneggio (Xara Group Ltd) Created: 9/3/94 Purpose: All Undoable operations should be derived from this class. SeeAlso: Operation ********************************************************************************************/ class UndoableOperation: public Operation { CC_DECLARE_DYNCREATE( UndoableOperation ) public: // ------------------------------------------------------------------------------------- // The all new Do functions // These functions are the operation's high level interface, a shiny veneer protecting // you from such beasties as system integrity, and attribute optimisation. Each Do // function performs a 'bit' of an operation and generates the actions neccessary to // undo/redo the damage it performs. The functions each return a BOOL // Success/Failure status. // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! IMPORTANT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! // Whenever a DO function fails the operation should tidyup // and then call End(). It should not under any circumstance call any other Do functions // or create any other actions. // Do functions which operate on nodes normally come in two flavours. The generally // more useful flavour takes a range of nodes as its input (usually the range // of selected nodes). Also provided is a flavour which operates on a single node. // Some Do functions have out of necessity to create an action for every node in the // range which is supplied to it. An example of such a function is DoMoveNodes which // needs to record the old position of every node which moves in the tree. // Other Do functions like DoInvalidateNodesRegions need only to create a single // action which stores the nodes it must operate on compactly in a range. If you are // to perform an action (for want of a better word) on a range of nodes, then you // would be extremely silly to call the single node flavour for each node in the // range, (they are very memory greedy). Even if you know that a function has // currently to create an action for each range member it is far better to call the // range flavour because it could all change in the future. // Operation History size integrity // -------------------------------- // In Camelot it is important that the size of the operation history accurately reflects // the amount of memory which has been allocated for undo and redo information. // Most of the time you are shielded from worrying about such things. However some of the // lower level do functions require a bit of information to help them to calculate the // size of the undo/redo information. // A good example of this is the DoHideNode function which takes in an IncludeSubtreeSize // flag. This indicates if the size of the subtree being hidden should be considered as // 'in' the operation history or not. // DoHideNode is used whenever we need to remove an object from the tree. In this // circumstance we would set IncludeSubtreeSize = TRUE, because the subtree which has // been removed, should be considered 'in' the Operation History. // DoHideNode is also used whenever we move a subtree from one position in the document // tree to another position in the tree. In this circumstance we set // IncludeSubtreeSize = FALSE, because the subtree which is being hidden is in the // document still, not in the operation history. // ************************************************************************************* // Low level Do functions // A Low level Do function is a function which usually gets gets called by higher level // Do functions. It generally creates a single action. // ------------------------------------------------------------------------------------- // Functions for invalidating regions // The reason these functions require a spread parameter is that very often the node // that needs invalidating is hidden. BOOL DoInvalidateNodesRegions(Range NodeRange, BOOL IncludeBlobs, BOOL UndoBlobs = FALSE, BOOL IfBgRedraw = FALSE, BOOL bForceRecache = TRUE); BOOL DoInvalidateNodeRegion(NodeRenderableBounded* Node, BOOL IncludeBlobs, BOOL UndoBlobs = FALSE, BOOL IfBgRedraw = FALSE, BOOL bForceRecache = TRUE); // Function to invalidate an arbitary region on a spread BOOL DoInvalidateRegion (Spread *pSpread, const DocRect &InvalidRegion ); // ------------------------------------------------------------------------------------- // These functions save a copy of the specified nodes. The copies are restored when we undo. BOOL DoSaveCopyOfNode(NodeRenderable* Node); BOOL DoSaveCopyOfNodes(Range NodeRange); // ------------------------------------------------------------------------------------- // functions for hiding subtrees // This function must be used if a pointer to the NodeHidden hiding the NodeToHide is // required BOOL DoHideNode(Node* NodeToHide, BOOL IncludeSubtreeSize, NodeHidden** nodeHidden = NULL, BOOL TellSubtree = TRUE); BOOL DoHideNodes(Range NodeRange, BOOL IncludeSubtreeSize, BOOL TellSubtree = TRUE); BOOL DoHideComplexRange(Range& RangeToHide); // ************************************************************************************* // High level Do functions // This function inserts a new node onto the active layer of a spread BOOL DoInsertNewNode(NodeRenderableBounded* NewNode, Spread *pSpread, //DocRect Bounds, BOOL InvalidateRgn, BOOL ClearSelection = TRUE, BOOL SelectNewObject = TRUE, BOOL NormaliseAttributes = TRUE); // This function inserts a new node attached to ContextNode in the direction specified BOOL DoInsertNewNode(NodeRenderableBounded* NewNode, Node* ContextNode, AttachNodeDirection Direction, //DocRect Bounds, BOOL InvalidateRegion, BOOL ClearSelection = TRUE, BOOL SelectNewObject = TRUE, BOOL NormaliseAttributes = TRUE); // -------------------------------------------------------------------------------------- // Functions to move a node to another position in the document tree BOOL DoMoveNode(Node* MoveNode, Node* Destination, AttachNodeDirection Direction); BOOL DoMoveNodes(Range NodeRange, Node* Destination, AttachNodeDirection Direction); // This static BOOL is a bit of a bodge. // It is set while a node is being moved, so that the undo ops know not // to call the 'HidingNode' function, which should only be called when // a node is 'really' being hidden. static BOOL MovingNode; // -------------------------------------------------------------------------------------- // Functions to transform objects BOOL DoTransformNode(NodeRenderableInk* NodeToTransform, TransformBase* T); BOOL DoTransformNodes(Range NodeRange, TransformBase* T); // -------------------------------------------------------------------------------------- BOOL DoMakeShapes(Range NodeRange); BOOL DoFlattenRange(Range NodeRange); BOOL DoCopyNodesToClipboard(Range NodeRange); // -------------------------------------------------------------------------------------- // Hides all instances of nodes with class NodeClass from the subtree BOOL DoRemoveAttrTypeFromSubtree(Node* Subtree, CCRuntimeClass* NodeClass, Node* pExceptThis = NULL); // Functions that manipulate NodePath objects // Helper function to change selection with undo BOOL DoChangeSelection(NodePath* ThisNode, INT32 Index, BOOL NewState); BOOL DoDeletePathSection(NodePath* ThisNode, INT32 Index, INT32 NumElements, BOOL RedrawPath = TRUE); BOOL DoAlterPathElement(NodePath* ThisNode, INT32 Index, DocCoord NewCoord, PathFlags NewFlags, PathVerb NewVerb, BOOL RedrawPath = TRUE); BOOL DoInsertPathElement( NodePath* ThisPath, INT32 Index, DocCoord NewCoord, PathFlags NewFlags, PathVerb NewVerb, BOOL RedrawPath = TRUE); BOOL DoReversePath (NodePath* ThisPath, BOOL RedrawPath = TRUE); BOOL DoSmoothNodePath(NodePath* pThisNode, double smoothacc); BOOL DoMakeNodeFromPath(NodePath* pParentNode, Path* pParentPath, AttachNodeDirection Direction, BOOL CopyAttributes); // -------------------------------------------------------------------------------------- // Do functions for attribute optimisation // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // This function must get called prior to a new attribute being applied BOOL DoLocaliseForAttrChange(NodeRenderableInk* Object, AttrTypeSet* pAffectedAttrTypes, ObjectSet* pLocalisedCompounds); BOOL DoLocaliseForAttrChange(NodeRenderableInk* Object, CCRuntimeClass* pAffectedAttrType, ObjectSet* pLocalisedCompounds); // versions of the function which localise all attributes in a range BOOL DoLocaliseForAttrChange(Range* pRange, AttrTypeSet* pAffectedAttrTypes, BOOL ExcludeTextObjects = FALSE); BOOL DoLocaliseForAttrChange(Range* pRange, CCRuntimeClass* pAffectedAttrType); // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // This function must get called after an attribute has been applied // Useful when applying multiple attributes to a single object BOOL DoFactorOutAfterAttrChange(NodeRenderableInk* Object, AttrTypeSet* pAffectedAttrTypes); // Useful when applying a single attribute to a single object BOOL DoFactorOutAfterAttrChange(NodeRenderableInk* Object, CCRuntimeClass* pAffectedAttrType); // versions of the function which factor out attributes on all nodes in the range // useful when applying multiple attributes to a range of objects BOOL DoFactorOutAfterAttrChange(Range* pRange, AttrTypeSet* pAffectedAttrTypes); // useful when applying a single attribute to a range of objects BOOL DoFactorOutAfterAttrChange(Range* pRange, CCRuntimeClass* pAffectedAttrType); // versions of the function which factor out attributes on all compounds in the // pLocalisedCompounds set // Useful when applying attributes to a set of objects which don't fall into a range BOOL DoFactorOutAfterAttrChange(ObjectSet* pLocalisedCompounds, AttrTypeSet* pAffectedAttrTypes); BOOL DoFactorOutAfterAttrChange(ObjectSet* pLocalisedCompounds, CCRuntimeClass* pAffectedAttrType); // These function should be called before deleting all objects in a range. It works // out the attributes which must be factored out after objects have been deleted. // This function perhaps belongs in the range cos this is what it operates on. // However it seems more convenient for it to live here as it is designed // to be used with the DoFactorOutAfterDeletion function. // These funs are now defunct //BOOL GetPreDelFactorOutInfo(Range* pRange, List* pPreDelFactorOutInfoList); // This function should get called after a range of objects have been deleted ('Hidden') //BOOL DoFactorOutAfterDeletion(List* pPreDelFactorOutInfoList); // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ BOOL DoFactorOutCommonChildAttributes(NodeRenderableInk* CompoundObject, BOOL Global = FALSE, AttrTypeSet* pAffectedAttrTypes = NULL); BOOL DoFactorOutCommonAttributes(NodeRenderableInk* pRootNode, BOOL bGlobal = FALSE, AttrTypeSet* pAffectedAttrTypes = NULL); BOOL DoLocaliseCommonAttributes(NodeRenderableInk* CompoundObject, BOOL CheckForDuplicates = FALSE, BOOL Global = FALSE, AttrTypeSet* pAffectedAttrTypes = NULL); // -------------------------------------------------------------------------------------- // Functions for selecting/deselecting nodes (these may not be required in future) BOOL DoSelectNode(NodeRenderableInk* NodeToSelect, Spread *Parent = NULL); BOOL DoDeselectNode(NodeRenderableInk* NodeToDeselect, Spread *Parent = NULL); static BOOL RegisterOpDescriptor( UINT32 toolID, UINT32 txID, CCRuntimeClass* RuntimeClass, TCHAR* tok, pfnGetState gs, UINT32 helpId = 0, UINT32 bubbleID = 0, UINT32 resourceID = 0, UINT32 controlID = 0, SystemBarType GroupBarID = SYSTEMBAR_ILLEGAL, BOOL ReceiveMessages = TRUE, BOOL Smart = FALSE, BOOL Clean = FALSE, UINT32 OneOpenInstID =0, UINT32 AutoStateFlags = 0 ); UndoableOperation(); virtual ~UndoableOperation(); // This virtual function gets called from the EndOp method after the op has successfully ended // and added to the OperationHistory. Override this function to perform operation merging. Note // that this function cannot fail (cos it's too scary). virtual void PerformMergeProcessing() ; void MergeWithPrevious(); // -------------------------------------------------------------------------------------- // Karim MacDonald 19/01/2000 // An override for Operation's UpdateChangedNodes(ObjChangedaram*, Spread*) function, // as well as a NoStretchUpdateChangedNodes() fn, both required as part of the stretching // implementation. virtual BOOL UpdateChangedNodes(ObjChangeParam* pParam, Spread* pSpread = NULL); virtual BOOL NoStretchUpdateChangedNodes(ObjChangeParam* pParam, Document* pDoc); // Karim 20/01/2000 // A virtual behaviour-ID function, used by the stretching/extension framework, which // denotes whether this node might result in the bounds of a named set changing. This // most often happens when a node changes its bounds, hence the function name. // // The rule of thumb is - if your Op might change the bounds of a node, then override // this function and return TRUE from it. examples: OpGroup - no; OpPaste - yes. // Do a search for 'MayChangeNodeBounds' for more examples. virtual BOOL MayChangeNodeBounds() const { return FALSE; } // -------------------------------------------------------------------------------------- // Phil 16/02/2005 // // Functions for applying attributes to nodes // public: virtual BOOL GetStarted() const { return FALSE; } private: // This var is a flag that ensures that this warning will only appear once for the lifetime of this op BOOL WarnInsertObjsOntoLockedLayers; // DMc // includes the parent nodes to transform in the given range Range * IncludeParentTransformNodesInRange(Range * Rng); }; #endif