collist.h

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// $Id: collist.h 1282 2006-06-09 09:46:49Z alex $
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 */

// collist.h - the ColourList class


#ifndef INC_COLLIST
#define INC_COLLIST

//#include "errors.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "list.h" - in camtypes.h [AUTOMATICALLY REMOVED]

class BaseDocument;

class IndexedColour;
class Document;



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

>   class ColourList : public List

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Purpose:    A colour list is held by each document to store the list of available
                IndexedColours for use by that document. (This colour list is displayed
                in the ColourBar/ColourGallery via the ColGalDisplayList which references
                colours held in the ColourList).

                The ColourList also provides a couple of special access methods for
                determining the number of visible/undeleted colours in the document
                (deleted colours are still held in this list, but are marked deleted
                for undo purposes - if scanning the ColourList, remember to check
                IndexedColours IsDeleted() flag) -- See the Undeleted list operators
                provided by this class to save you loads of effort.

                The Colour list also includes another simple List of unnamed colours
                which are used for local colour attributes in a document. Unnamed
                colours are simply stored in this list, and are simpler than named 
                colours...

    SeeAlso:    IndexedColour; ColGalDisplayList; BaseDocument; List

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

class ColourList : public List
{
CC_DECLARE_MEMDUMP(ColourList)

public:     // Construction/Initialisation
    ColourList();
    ~ColourList();

    void Init(BaseDocument *ParentDocument);

public:     // Overridden List interface
    void AddHead(ListItem *);           // Overridden List members: You MUST use AddItem
    void AddTail(ListItem *);

    BOOL AddItem(IndexedColour *NewColour); // Add a colour, ensuring it has a unique name


    // Overrides (well, they would be if the base class had made these virtual!) which call
    // the base class after first ensuring the name is unique
    LISTPOS InsertBefore(LISTPOS here, ListItem* item);
    ListItem *InsertBefore(ListItem* here, ListItem* item);

    LISTPOS InsertAfter(LISTPOS here, ListItem* item);
    ListItem *InsertAfter(ListItem* here, ListItem* item);

    // Override DeleteAll to do safe deletion of linked colours
    virtual void DeleteAll();
    

public:     // Special ColourList listy methods
    UINT32 GetUndeletedCount(void);
    IndexedColour *FindUndeletedItem(INT32 Index);
    IndexedColour *GetUndeletedHead(void);
    IndexedColour *GetUndeletedNext(IndexedColour *ThisItem);
        // Count/Find/Head/Next functions which ignore 'deleted' IndexedColours

    inline BaseDocument *GetParentDocument(void);
        // Find the document in which this colour list resides

private:
    BaseDocument *ParentDoc;

public:     // Special linking inheritance support
    IndexedColour **CompileInheritanceArray(IndexedColour *Parent);
        // Compiles a NULL-terminated array of pointers to all colours which are linked
        // to this, both directly and indirectly (i.e. an array listing the entire
        // inheritance 'subtree' from (and including) 'Parent')

    void RemoveLinksToColour(IndexedColour *DeadColour);
        // Ensures no other colours have this colour as a linked parent

    BOOL IsColourInUseInDoc(IndexedColour *TheColour, BOOL IgnoreColourGallery = FALSE);
        // Determines if a colour is used in the document either directly (DocColour Ref)
        // or indirectly (parent/ancestor of a linked/tint colour which is used in the doc)

    void InvalidateInheritanceCache(void);
        // Invalidates the cached results of the above function

private:    // Private variables for inheritance support
    IndexedColour *ArrayParent;             // Current parent of the cached array
    IndexedColour **InheritanceArray;       // Cached array of all offspring of ArrayParent

public:     // Named colour support
    BOOL NamedColourExists( PCTSTR pName );
    BOOL NamedColourExists(const StringBase *pName);
        // Returns TRUE if the given name is in use by any item in this colour list

    BOOL GenerateUniqueColourName(const StringBase *pPrefix, String_64 *pResult);
        // Outputs a name (Based on pPrefix) that is unique in this ColourList
        // Returns TRUE if the output name is different from the pPrefix string

private:    // Private data for named colour support
    INT32 LastUnnamedColour;                    // Kept to optimise unnamed colour naming

public:     // Unnamed colour storage support
    inline List *GetUnnamedColours(void);

private:    // Private data for unnamed colours
    List UnnamedColours;
};



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

>   inline BaseDocument *ColourList::GetParentDocument(void)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/11/94
    Returns:    The document in which this colour list resides
    Purpose:    To find the parent document of this colour list

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

BaseDocument *ColourList::GetParentDocument(void)
{
    ERROR3IF(ParentDoc == NULL, "Uninitialised ColourList detected!");
    return(ParentDoc);
}



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

>   inline List *ColourList::GetUnnamedColours(void)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/3/95
    Returns:    The storage-list containing this document's unnamed colours
    Purpose:    To find the unnamed colours for this document

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

List *ColourList::GetUnnamedColours(void)
{
    return(&UnnamedColours);
}


#endif

---