styles.h

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// $Id: styles.h 1688 2006-08-10 12:05:20Z gerry $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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=================================XARAHEADEREND============================
 */

// The document component for the document's unit list.

#ifndef INC_STYLES
#define INC_STYLES

class BaseCamelotFilter;
class CXaraFileRecord;


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

>   class Style : public CC_CLASS_MEMDUMP

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    

    SeeAlso:    Styles

********************************************************************************************/
class Style : public CC_CLASS_MEMDUMP
{
    CC_DECLARE_MEMDUMP(Style)

public:
    virtual ~Style() = 0;
    virtual Style* CreateCopy(const StringBase& NewName) const = 0;
    virtual BOOL operator==(const Style& OtherStyle) const;

    const StringBase&   GetName() const;


protected:
    Style(const StringBase& Name);

    BOOL SetName(const StringBase& Name);

private:
    String_64       m_Name;
};


class StyleContainer;
class StyleContainerItem;
/**************************************************************************************

>   class StyleIterator

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/97

    Purpose:    Returns entries in a visible list

    See Also:   VisibleList::Begin(), End()

**************************************************************************************/
class StyleIterator
{
public:
    StyleIterator& operator ++();
    Style& operator*();
    BOOL operator!=(const StyleIterator& Other);

    StyleIterator(StyleContainer& Container, StyleContainerItem* const pPosition);

private:
    StyleContainerItem* m_CurrentItem;
    StyleContainer&     m_Container;
};

class StylesExporter;
typedef INT32 XFileRef;
/********************************************************************************************

>   class Styles : public DocComponent

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    This DocComponent is an abstract class for styles. I put it in 'cos 
                someone's bound to come along and want the functionality of the derived class
                WizOpStyleComponent

    SeeAlso:    StyleComponentClass

********************************************************************************************/
class Styles : public DocComponent
{
    CC_DECLARE_DYNAMIC(Styles)
public:
    virtual BOOL Init();

    virtual Style* AddStyle(const Style& NewStyle);
    virtual BOOL MergeStyles(Styles& OtherStyles);

// Examining the styles
    virtual StyleIterator Begin() const;
    virtual const StyleIterator& End() const;
    virtual Style* FindStyleFromName(const StringBase& StyleName) const;



//  Overridden methods called before and after a tree copy
    virtual BOOL StartComponentCopy();
    virtual BOOL EndComponentCopy(); 
    virtual void AbortComponentCopy();  

    virtual Style* CopyComponentData(const Style& NewStyle);

    virtual ~Styles();
protected:
    Styles();
    Styles(const Styles& OtherStyles);
    Styles& operator=(const Styles&);

    BOOL GenerateUniqueName(const StringBase& Prefix, StringBase* pResult);
    BOOL NameExists(const StringBase& Name) const;
    void SendStylesChangeMessage();
    
// Data access
    StyleContainer& GetContainer() const;
    Styles& GetStylesToAdd() const;
protected:
    StylesExporter* m_pCurrentExporter; // used when exporting
private:
    StyleContainer* m_pStyleContainer;


    Styles*         m_pStylesToAdd;     // used when copying component
};



class WizOp;
class WizOpStyleRecordHandler;
/********************************************************************************************

>   class WizOpStyleComponentClass : public DocComponentClass

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    Provide a class that will add document information components to new documents.

    SeeAlso:    DocComponentClass

********************************************************************************************/
class WizOpStyleComponentClass : public DocComponentClass
{
    CC_DECLARE_DYNAMIC(WizOpStyleComponentClass)

public:
    static BOOL Init();

    virtual BOOL AddComponent(BaseDocument*);
};


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

>   class WizOpStyle : public Style

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    A WizOpStyle is a style solely for the purpose of naming WizOps

********************************************************************************************/
class WizOpStyle : public Style
{
    CC_DECLARE_MEMDUMP(WizOpStyle)
public:
    WizOpStyle( const StringBase& Name, const StringBase& Question, 
                const WizOp& WizOpRef, const StringBase& Param);

    virtual Style* CreateCopy(const StringBase& NewName) const;
    virtual BOOL operator==(const Style& OtherStyle) const;

    const StringBase&   GetQuestion() const;
    BOOL                SetQuestion(const StringBase& NewQuestion);

    const WizOp&        GetWizOp() const;
    const StringBase&   GetParam() const;

protected:
    BOOL                SetParam(const StringBase& NewParam);

private:
    String_256          m_Question;
    const WizOp&        m_WizOp;
    String_256          m_Param;
};



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

>   class WizOpStyles : public Styles

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    Provide a component that allows us to save out the information for this document
                using the serialisation facilities of the DocComponent base class.
    SeeAlso:    DocComponent

********************************************************************************************/
class WizOpStyles : public Styles
{
    CC_DECLARE_DYNAMIC(WizOpStyles)

public:
    WizOpStyles()   {}
    // Usual document component functions...

// Import
    virtual BOOL StartImport(BaseCamelotFilter *pFilter);
    virtual BOOL EndImport(BaseCamelotFilter *pFilter, BOOL Success);

    WizOpStyle* FindStyleFromRecordReference(XFileRef RecordRef) const;

    BOOL                        SetRecordHandler(WizOpStyleRecordHandler& RecordHandler);
    WizOpStyleRecordHandler&    GetRecordHandler() const;

// Export
    virtual BOOL StartExport(BaseCamelotFilter *pFilter);
    virtual BOOL EndExport(BaseCamelotFilter *pFilter, BOOL Success);

    virtual XFileRef GetRecordRefForStyle(const WizOpStyle& Style);

private:
    WizOpStyleRecordHandler*    m_pImporter;
};


extern const INT32 XFILEREF_ERROR;

class RecordReferenceItem;
class List;

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

>   class RecordReferencingExporter : public CC_CLASS_MEMDUMP

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    

    SeeAlso:    Styles

********************************************************************************************/
class RecordReferencingExporter : public CC_CLASS_MEMDUMP
{
    CC_DECLARE_MEMDUMP(RecordReferencingExporter)

protected:
    RecordReferencingExporter(BaseCamelotFilter& FilterToUse) : m_Filter(FilterToUse)   {}
    RecordReferencingExporter(const RecordReferencingExporter& Other);
    const RecordReferencingExporter& operator=(const RecordReferencingExporter& Other);

    virtual ~RecordReferencingExporter();

// Implementation
    virtual XFileRef WriteItem(const RecordReferenceItem& TentativeExportItem);

    virtual XFileRef WriteRecord(const RecordReferenceItem& ItemToExport) = 0;

// Support functions
    virtual BOOL AddExportedItem(RecordReferenceItem& NewItem);
    virtual const RecordReferenceItem* FindExportedItem(const RecordReferenceItem& ItemToFind);


// Data Access
    BaseCamelotFilter&  GetFilter()                         {   return m_Filter;    }

private:
    BaseCamelotFilter&  m_Filter;
    List                m_ExportedItems;
};


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

>   class StylesExporter : public RecordReferencingExporter

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    

    SeeAlso:    Styles

********************************************************************************************/
class StylesExporter : public RecordReferencingExporter
{
    CC_DECLARE_MEMDUMP(StylesExporter)

public:
    StylesExporter(Styles& StylesToExport, BaseCamelotFilter& FilterToUse);

// The entry point...
    virtual XFileRef WriteStyle(const WizOpStyle& StyleToWrite);

protected:
// Implemented pure
    virtual XFileRef WriteRecord(const RecordReferenceItem& ItemToExport);

private:
    Styles&             m_Styles;
};

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

>   class WizOpStyleRecordHandler : public CamelotRecordHandler

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    Allows WizOpStyleComponent's to be read from the .xar/.web file formats.

********************************************************************************************/
class WizOpStyleRecordHandler : public CamelotRecordHandler
{
    // Give my name in memory dumps
    CC_DECLARE_DYNAMIC(WizOpStyleRecordHandler);

public:
    WizOpStyleRecordHandler();
    virtual ~WizOpStyleRecordHandler();

    // overridden functions
    virtual UINT32* GetTagList();
    virtual BOOL    Init(BaseCamelotFilter* pFilter);
    virtual BOOL    HandleRecord(CXaraFileRecord* pCXaraFileRecord);
    virtual BOOL    EndImport();

    WizOpStyle* FindStyleFromRecordReference(XFileRef RecordRef) const;

#ifdef XAR_TREE_DIALOG
    virtual void GetRecordDescriptionText(CXaraFileRecord* pCXaraFileRecord,StringBase* Str);
    virtual void GetTagText(UINT32 Tag,String_256& Str);
#endif

protected:
    WizOpStyleRecordHandler(const WizOpStyleRecordHandler& Other);
    WizOpStyleRecordHandler& operator=(const WizOpStyleRecordHandler& Other);

// Implementation
    WizOpStyle* AddStyle(   const StringBase& Name, const StringBase& Question, 
                            const StringBase& WizOpName, const StringBase& Param);

    BOOL AddRecordReference(XFileRef RecordRef, const WizOpStyle& ImportedStyle);
// Data access
    WizOpStyles& GetTentativeStyles();


private:
//  WizOpStyles*    m_pStyleComponent;  // a pointer to the importing document's styles
    WizOpStyles*    m_pTentativeStyles; // styles in & not in the importing document's styles
    List            m_ImportedItems;
};


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

>   class StylesMessage : public Msg

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/07/96

    Purpose:    Informs us that a Styles component has changed

    SeeAlso:    Styles

********************************************************************************************/
class StylesMessage : public Msg
{
    CC_DECLARE_DYNAMIC(StylesMessage);

public:
    StylesMessage(Styles& StylesChanging) :
        m_StylesChanging(StylesChanging)                {}

    Styles& GetStylesChanging()                         {   return m_StylesChanging;    }

private:
    Styles& m_StylesChanging;
};

#endif  // INC_STYLES

---