nodeattr.h

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// $Id: nodeattr.h 1445 2006-07-14 20:15:02Z phil $
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 */

// The Node Attribute Class

#ifndef INC_NODEATTR
#define INC_NODEATTR

#include "node.h"

class DocColour;
class AttributeValue;
class BlendAttrParam;
class NodeRenderableInk;
class UndoableOperation;

// Graeme (21/3/00) - This list of attributes was originally in attrmgr.h. I've moved them
// here so that they can be used to identify attribute nodes directly.
typedef enum
{
    ATTR_BAD_ID     = (UINT32)~1,
    ATTR_STROKECOLOUR = 0,
    ATTR_STROKETRANSP,
    ATTR_FILLGEOMETRY,
    ATTR_TRANSPFILLGEOMETRY,
    ATTR_FILLMAPPING,
    ATTR_TRANSPFILLMAPPING,
    ATTR_FILLEFFECT,
    ATTR_LINEWIDTH,
    ATTR_WINDINGRULE,
    ATTR_JOINTYPE,
    ATTR_QUALITY,
    ATTR_DASHPATTERN,
    ATTR_STARTCAP,
    ATTR_STARTARROW,
    ATTR_ENDARROW,
    ATTR_MITRELIMIT,
    ATTR_USERATTRIBUTE,
    ATTR_WEBADDRESS,
    ATTR_TXTFONTTYPEFACE,
    ATTR_TXTBOLD,
    ATTR_TXTITALIC,
    ATTR_TXTASPECTRATIO,
    ATTR_TXTJUSTIFICATION,
    ATTR_TXTTRACKING,
    ATTR_TXTUNDERLINE,
    ATTR_TXTFONTSIZE,
    ATTR_TXTSCRIPT,
    ATTR_TXTBASELINE,
    ATTR_TXTLINESPACE,
    ATTR_TXTLEFTMARGIN,
    ATTR_TXTRIGHTMARGIN,
    ATTR_TXTFIRSTINDENT,
    ATTR_TXTRULER,
    ATTR_OVERPRINTLINE,
    ATTR_OVERPRINTFILL,
    ATTR_PRINTONALLPLATES,
    ATTR_STROKETYPE,
    ATTR_VARWIDTH,
    ATTR_BEVELINDENT,
    ATTR_BEVELTYPE,
    ATTR_BEVELCONTRAST,
    ATTR_BEVELLIGHTANGLE,
    ATTR_BEVELLIGHTTILT,
    //ATTR_PAINTINGMODE,    // Bye bye painting mode!
    ATTR_BRUSHTYPE,
    ATTR_FEATHER,
    ATTR_CLIPREGION,
    ATTR_CLIPVIEW,

    ATTR_FIRST_FREE_ID,     // Put all new attributes above this line!

    ATTR_MOULD = 0,
    ATTR_ENDCAP = 0
} AttrIndex;

typedef const StringBase&   AttributeIdentifier;
class VisibleAttribute;
extern const String_8 NullString;
/***********************************************************************************************

>   class NodeAttribute : public NodeRenderable

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    21/6/93
    Purpose:    Abstract class from which various Attribute nodes are derived.

***********************************************************************************************/

class NodeAttribute : public NodeRenderable
{
    CC_DECLARE_DYNAMIC( NodeAttribute );   

public:
    NodeAttribute(); 
    NodeAttribute(Node* ContextNode,  
                      AttachNodeDirection Direction,    
                      BOOL Locked=FALSE, 
                      BOOL Mangled=FALSE,  
                      BOOL Marked=FALSE, 
                      BOOL Selected=FALSE);

    virtual void Render(RenderRegion* pRender) {};
    virtual SubtreeRenderState RenderSubtree(RenderRegion* pRender, Node** ppNextNode = NULL, BOOL bClip = TRUE);
    virtual BOOL NeedsToExport( RenderRegion* pRender, BOOL VisibleLayersOnly = FALSE,
                                BOOL CheckSelected = FALSE );
    virtual Node* SimpleCopy();                         // Copies a node
    virtual INT32 operator==(const NodeAttribute& NodeAttrib); 
    virtual BOOL IsDifferent(Node *pOther);
    virtual UINT32 GetAttrNameID(void); 
    virtual DocColour *EnumerateColourFields(UINT32 Context);

    virtual CCRuntimeClass* GetAttributeType() { return GetRuntimeClass(); }
    virtual AttributeValue* GetAttributeValue() { return NULL; }
    virtual AttributeIdentifier GetAttributeClassID() const     {   return NullString;  }
    virtual AttrIndex GetAttributeIndex () { return ATTR_BAD_ID; }
    virtual VisibleAttribute* CreateVisibleAttribute() const    {   return NULL;    }
    virtual BOOL CopyComponentData(BaseDocument* SrcDoc, BaseDocument* NodesDoc); 
    virtual BOOL Blend(BlendAttrParam* pBlendParam);
    virtual BOOL HasEquivalentDefaultValue(BOOL bAppearance = FALSE);

    // This routine returns any secondary attribute that needs to be changed,
    // when this attribute is changed.
    virtual NodeAttribute* GetOtherAttrToApply(BOOL* IsMutate) { return NULL; }

    // This vfn denotes whether the other attribute above will be applied selectively,
    // which prevents OpApplyAttribToSelected::ApplyToSelection() from blanket-applying
    // the other attribute to the selection.
    virtual BOOL OtherAttrIsAppliedSelectively() const { return FALSE; }

    virtual void OnMakeCurrent() {}

    // Routines to scan the tree in reverse render order returning attributes which are
    // "in scope" for a given node.
    static NodeAttribute* FindFirstAppliedAttr(Node* pContextNode, Node* pRoot = NULL);
    static NodeAttribute* FindPrevAppliedAttr(Node* pContextNode, Node* pRoot = NULL);

    virtual BOOL IsAnAttribute() const; 
    virtual BOOL IsOrHidesAnAttribute() const;
    virtual BOOL IsRenderedAsInk() const {return TRUE;}

    virtual BOOL IsAValueChange() const; 
    virtual BOOL IsAColourFill() const; 
    virtual BOOL IsATranspFill() const; 
    virtual BOOL IsAStrokeColour() const; 
    virtual BOOL IsAStrokeTransp() const; 

    virtual BOOL IsAFlatFill() const; 
    virtual BOOL IsAGradFill() const; 
    virtual BOOL IsABitmapFill() const; 
    virtual BOOL IsAFractalFill() const;
    virtual BOOL IsALineLevelAttrib() { return FALSE; }; // Is the attribute a text line level attribute
    virtual BOOL IsALineWidthAttr() const;
    virtual BOOL NeedsToRenderAtEachBrushStroke() const;

    // This virtual was added because attributes like the NodeAttrQuality can never be directly
    // applied to an object. 
    virtual BOOL CanBeAppliedToObject() { return TRUE; };

    // This virtual was primarily added to support triggers. If the attribute has exactly the same
    // value then it's not multiply applied. It might be bad if you select the attributes into 
    // render regions since they don't have the notion of multiple attrs of the same type.
    virtual BOOL CanBeMultiplyApplied() { return FALSE; }
    // Template/WizOp attributes need to remain with the objects they were attached to.
    // Hence they are not optimized, whereas the base class is.
    virtual BOOL ShouldBeOptimized()    { return !IsEffectAttribute(); }

    // Effect Attributes live at different positions in the tree and so don't have
    // the same scope as normal attributes
    virtual BOOL IsEffectAttribute() const;

    BOOL IsADefaultAttr(); 
        // Simple but useful fn to determine if the attribute (which must be in the tree) is a default
        // attribute

    virtual BOOL EffectsParentBounds();
    virtual DocRect GetAttrBoundingRect(NodeRenderableInk* pParent = NULL, CCAttrMap* pAttribMap = NULL);

    // virtual Transform fn which does nothing in the base class.
    virtual void TransformToNewBounds(DocRect& NewBounds) { return; } 

    virtual BOOL ShouldBecomeCurrent();

#ifdef _DEBUG
    virtual void ShowDebugTreeDetails() const;
#endif

protected:
    virtual void CopyNodeContents( NodeAttribute* NodeCopy );

public:
    // Starting from this attribute, returns the next attribute of the given type
    // that applies to the Node on which Node::FindFirstAttr was called, or null
    // if there isn't one.
    NodeAttribute* FindNextAttr(Node::TypeFunc pfnTest) const;

    // Ilan 27/4/00
    // New extensions to the attribute system - initially created to support feathering attribute

    // Determines whether dynamically created copies of the attribute need special post-copying update
    // Also means that it needs to receive object change messages from any child nodes within its scope
    virtual BOOL IsLinkedToNodeGeometry();
    virtual BOOL IsLinkedToThisNode(Node* pNode);

    // Attributes which are linked to node geometry, require the following additional
    // initialisation functions
    virtual BOOL PostDynCreateInit(CCAttrMap* pMap, Path* InkPath, CCRuntimeClass* pCreatorClass);
    virtual BOOL PostDynCreateInit(CCAttrMap* pMap, Node* pNode, CCRuntimeClass* pCreatorClass);
    virtual void PostDynCreateDeInit();

    // Lets the attribute know that the child objects have changed (nb see notes in definition)
    virtual BOOL LinkedNodeGeometryHasChanged(UndoableOperation* pOp);

    // When compound nodes are dynamically created inside blends to form one of the BlendRefs
    // it is necessary to supply 
    virtual BOOL LinkToGeometry(Node* pContext);
    // Called after a default attribute is created and attached to a NodeDocument
    // (ie when a new document is created)
    virtual void NewlyCreatedDefaultAttr(NodeDocument* pNode);

    // To determine if the NodeAttribute is the container (ie node in the tree) for the supplied AttributeValue
    virtual BOOL ContainsAttributeValue(AttributeValue* pVal);

    // Karim 15/11/2000
    // ID function for an attribute which diverts rendering offscreen, ie its AttributeValue is derived
    // from OffscreenAttrValue, eg AttrFeather.
    virtual BOOL IsAnOffscreenAttribute() { return FALSE; }

    // Allow attributes to supply additional paths into the BecomeA system
    // (E.g. special outline strokes)
//  virtual BOOL DoBecomeAdditionalPath(BecomeA* pBecomeA, NodePath* pNode, NodeRenderableInk* pCreatedByNode, CCAttrMap* pAttrMap) {return FALSE;}

// Karim 13/09/2000
// Virtual override of NodeRenderable::IsSeeThrough() - see base declaration for details.
public:
    virtual BOOL IsSeeThrough(BOOL CheckIndirectAttrs) { return FALSE; }
};

#endif

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