userattr.h

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// $Id: userattr.h 751 2006-03-31 15:43:49Z alex $
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 */

#ifndef INC_USERATTR
#define INC_USERATTR

class BlendAttrParam;
class BaseCamelotFilter;
class Style;

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

>   class UserAttribute : public AttributeValue

    Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
                    (Actually, it was more likely to be Graham, cos Tim quit a few months before)

    Created:    15/06/94
                    (More like mid '96 if you ask me)

    Purpose:    Represent a line width of a path.  This may be a simple stroking operator
                such as a constant line width, or a complex one such as variable line
                widths or an airbrush stroke operator.
                    (I'd say it stores a "key" string and an associated "value" string
                    for implementation of URLs and other such stuff, but if you say it
                    stores a line width, who am I to argue? ;-)

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

class UserAttribute : public AttributeValue
{
    CC_DECLARE_DYNCREATE(UserAttribute)
public:
    static BOOL Init();

    UserAttribute();
    UserAttribute& operator=(const UserAttribute& other);

    virtual void Restore(RenderRegion *, BOOL);
    virtual void Render(RenderRegion *, BOOL Temp = FALSE);
    virtual NodeAttribute *MakeNode();
    BOOL IsDifferent(AttributeValue *pAttr);
    virtual void SimpleCopy(AttributeValue *);

    // This blend the attribute value with the one provided by pBlendParam
    virtual BOOL Blend(BlendAttrParam* pBlendParam);

    // Extra virtual function for stroke type attributes.
    virtual BOOL RenderStroke(RenderRegion *, Path *) { return FALSE; }

    StringBase   Key;
    StringBase   LongKey;
    StringBase   Value;
    const Style* m_pStyle;      // used by StyleReferenceAttribute
};


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

>   class AttrUser : public NodeAttribute

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    21/6/93

    Purpose:    User Attribute Node

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

class AttrUser : public NodeAttribute
{
    CC_DECLARE_DYNCREATE(AttrUser)

public:
    AttrUser(); 
    AttrUser(Node* ContextNode,  
                      AttachNodeDirection Direction,    
                      BOOL Locked=FALSE, 
                      BOOL Mangled=FALSE,  
                      BOOL Marked=FALSE, 
                      BOOL Selected=FALSE); 
    AttrUser(const StringBase& NewKey, const StringBase& NewSubKey, const StringBase& NewValue);
    AttrUser(const StringBase& NewLongKey, const StringBase& NewValue);

    virtual void Render( RenderRegion* pRender );

    virtual Node* SimpleCopy();                         // Copies a node
    virtual INT32 operator==(const NodeAttribute& NodeAttrib); 
    virtual UINT32 GetAttrNameID(void); 
    virtual BOOL IsUserAttribute() const        { return TRUE; }

    void ShowDebugTreeDetails() const;          // Debugging function

    void GetDebugDetails(StringBase* Str);

    virtual UINT32 GetNodeSize() const;             // Returns size of node in bytes

    virtual void Transform( TransformBase& );

    // Yes, user attributes can be applied more than once to the same object
    virtual BOOL CanBeMultiplyApplied()     { return TRUE; }
    virtual BOOL ShouldBeOptimized();
    virtual BOOL EffectsParentBounds()      { return TRUE; }

    virtual BOOL Blend(BlendAttrParam* pBlendParam);

    virtual AttributeValue* GetAttributeValue() { return &Value; }
    virtual CCRuntimeClass* GetAttributeType() { return CC_RUNTIME_CLASS(AttrUser); }
    virtual AttributeIdentifier GetAttributeClassID() const;
    virtual AttrIndex GetAttributeIndex () { return ATTR_USERATTRIBUTE; }

    virtual VisibleAttribute* CreateVisibleAttribute() const;

    // Version 2 file format functions
    virtual BOOL WritePreChildrenWeb(BaseCamelotFilter* pFilter);
    virtual BOOL WritePreChildrenNative(BaseCamelotFilter* pFilter);

    BOOL ShouldBecomeCurrent();

    StringBase& GetWebAddress();

    virtual void PolyCopyNodeContents(NodeRenderable* pNodeCopy);

protected:
    void CopyNodeContents( AttrUser* NodeCopy );

    static const TCHAR s_KeyDelimiter;

public:
    UserAttribute Value;
};



#endif // INC_USERATTR

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