bmpseq.cpp

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// $Id: bmpseq.cpp 1282 2006-06-09 09:46:49Z 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
----------------------------------

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-----------------

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The additional rights are to use, modify, and distribute the software
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----------------

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


#include "camtypes.h"
#include "bmpseq.h"
//#include "document.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "bitmap.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "bmpcomp.h"
//#include "app.h" - in camtypes.h [AUTOMATICALLY REMOVED]


// Place any IMPLEMENT type statements here
CC_IMPLEMENT_MEMDUMP(BitmapSequenceInfo, CC_CLASS_MEMDUMP)
CC_IMPLEMENT_MEMDUMP(BitmapSequence, CC_CLASS_MEMDUMP)


// We want better memory tracking
#define new CAM_DEBUG_NEW

//#define DECLARE_PROCEDURE(p)      #define CURRENT_PROCEDURE_NAME  #p
//#define DECLARE_PROCEDURE_END(p)  #undef CURRENT_PROCEDURE_NAME
#define CURRENT_PROCEDURE_NAME          "bmpseq.cpp"

#define ERROR2_CLASS(arg, classname)    ERROR2IF(arg == NULL || !arg->IS_KIND_OF(classname),    \
                                        FALSE, #arg " isn't");
#define ERROR3IF_NOT_CLASS(arg, classname)      ERROR3IF(arg != NULL && \
                                                !arg->IS_KIND_OF(classname), \
                                                CURRENT_PROCEDURE_NAME " - " #arg " isn't");

#define ERROR3IF_NULL_CLASS(arg, classname)     ERROR3IF(arg == NULL || \
                                                !arg->IS_KIND_OF(classname), \
                                                CURRENT_PROCEDURE_NAME " - " #arg " isn't");

// Functions follow
/********************************************************************************************

>   void BitmapSequence::DeleteAll()

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Purpose:    Deletes all the KernelBitmaps in the sequence

********************************************************************************************/
void BitmapSequence::DeleteAll()
{
    Bitmaps.DeleteAll();
}


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

>   BOOL BitmapSequence::CopyFromDocumentList(Document* pDocument, const KernelBitmap* pStartBitmap, const UINT32 uNumberToCopy)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pDocument - the document to copy from
                pStartBitmap - a pointer to a KernelBitmap in the document's bitmap list
                providing a starting point from which to copy. 
                uNumberToCopy - the number of bitmaps to copy
    Purpose:    Copies a sequence of bitmaps from the given document's bitmap list into
                this BitmapSequence.

********************************************************************************************/
BOOL BitmapSequence::CopyFromDocumentList(Document* pDocument, const KernelBitmap* pStartBitmap, const UINT32 uNumberToCopy)
{
    if (pDocument == NULL)
    {
        pDocument = Document::GetSelected();
    }
    ERROR2IF(pDocument == NULL, FALSE, "pDocument == NULL")
    // The bitmap system relies on the Current Doc being correct,
    // so we'll set it to be on the safe side
    pDocument->SetCurrent();

    // Find this document's BitmapListComponent
    DocComponent* pDocBitmapList = pDocument->GetDocComponent(CC_RUNTIME_CLASS(BitmapListComponent));
    ERROR2IF(pDocBitmapList == NULL, FALSE, "Couldn't find document bitmap list");

    // Now get the actual bitmap list
    BitmapList* pBmpList = ((BitmapListComponent*)pDocBitmapList)->GetBitmapList();

    ListItem* pItem = (ListItem*)pStartBitmap;
    UINT32 uCurrentIndex = 1;

    while (uCurrentIndex <= uNumberToCopy)
    {
        KernelBitmap* pBmp = (KernelBitmap*)pItem;
        ERROR3IF_NULL_CLASS(pBmp, KernelBitmap);

        if (!AddBitmap(pBmp, INT32(uCurrentIndex)))
        {
            return FALSE;
        }

        pItem = pBmpList->GetNext(pItem);
        ++uCurrentIndex;
    }
    return TRUE;
}


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

>   KernelBitmap* FindBitmap(const List* const pBitmapList, const KernelBitmap* const pStart, 
                const KernelBitmap* const pBitmap)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pList - the list in which pListItem is
                pListItem - the list item from which we wish to find the offset
                uOffset - the number of the item further along the list which we wish to
                retrieve
    Returns:    A pointer to the desired list item
                NULL if gone off the end
    Purpose:    Finds the ListItem as the position uOffset items further down the list from
                pListItem.

********************************************************************************************/
KernelBitmap* FindBitmap(const List* const pBitmapList, const KernelBitmap* const pStart, 
                const KernelBitmap* const pBitmap)
{
    ERROR3IF_NULL_CLASS(pBitmap, KernelBitmap);

    if (pBitmapList == NULL)
    {
        return NULL;
    }
    const ListItem* pItem = pStart;
    const OILBitmap* pOILBmp = pBitmap->ActualBitmap;

    while (pItem != NULL)
    {
        KernelBitmap* pBmp = (KernelBitmap*)pItem;
        ERROR3IF_NOT_CLASS(pBmp, KernelBitmap);

        if (pBmp->ActualBitmap == pOILBmp || *pBmp->ActualBitmap == *pOILBmp)
        {
            return pBmp;
        }
        pItem = pBitmapList->GetNext(pItem);
    }
    return NULL;
}


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

>   const ListItem* FindOffsetItem(const List* pList, const ListItem* pListItem, UINT32 uOffset)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pList - the list in which pListItem is
                pListItem - the list item from which we wish to find the offset
                uOffset - the number of the item further along the list which we wish to
                retrieve
    Returns:    A pointer to the desired list item
                NULL if gone off the end
    Purpose:    Finds the ListItem as the position uOffset items further down the list from
                pListItem. Used by the search FindBitmapSubstring()

********************************************************************************************/
const ListItem* FindOffsetItem(const List* pList, const ListItem* pListItem, UINT32 uOffset)
{
    while (uOffset > 0 && pListItem != NULL)
    {
        pListItem = pList->GetNext(pListItem);
        --uOffset;
    }
    return pListItem;
}


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

>   KernelBitmap* FindBitmapSubstring(List* pMainList, List* pSubList, 
                const ListItem* pFirstMain, const ListItem* const pFirstSub,
                const INT32 nSubLength)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pMainList - the KernelBitmap list in which we wish to find pSubList
                pSubList - the KernelBitmap list we wish to find
                pFirstMain - the KernelBitmap in pMainList from which we wish
                to start searching
                pFirstSub - the KernelBitmap in pSubList from which we wish to start
                matching
    Purpose:    This is used internally by FindBitmapSubstring(...3 arguments...).
                Call that instead.
    Notes:      Implements some well known string search algorithm whose name I can't
                remember. Basically, it looks at the end of the search string for a match
                and moves along in chunks if it can get away with it. Here it is from the STL

                template <class charT>
                size_t
                basic_string<charT>::find (const basic_string<charT>& str, size_t pos) const
                                                                        _THROW_NONE
                {
                    return find_str (str.data(), pos, str.length());
                }
                
                /*template <class charT>
                size_t
                basic_string<charT>::find_str (const charT* s, size_t pos, size_t len) 
                                               const _THROW_NONE
                {
                    size_t  count = pos;
                    size_t  shift;
                    size_t  place;
                    if ((length() == 0) || (len == 0))
                        return NPOS;
                    while (len <= (length()-count))
                    {
                        for (place = 0; place < len; ++place)
                        {
                            if (baggage_type::ne(   *(s+len-1-place),
                                                    *(data()+count+(len-1-place)))
                                                )
                                break;
                        }
                        if (place == len)
                            return count;
                        shift = find(*(s+len-1-place), count+(len-place));
                        if (shift == NPOS)
                            return NPOS;
                        count = shift-(len-place-1);
                    }
                    return NPOS;

********************************************************************************************/
KernelBitmap* FindBitmapSubstring(List* pMainList, List* pSubList, 
                const ListItem* pFirstMain, const ListItem* const pFirstSub,
                const INT32 nSubLength)
{
    ERROR3IF_NOT_CLASS(pMainList, List);
    ERROR3IF_NOT_CLASS(pSubList, List);

    if (pFirstMain == NULL || pFirstSub == NULL)
        return NULL;

    ERROR3IF_NOT_CLASS(pFirstMain, KernelBitmap);
    ERROR3IF_NOT_CLASS(pFirstSub, ImportBitmap);

    if (nSubLength <= 0)
    {
        ERROR3("FindBitmapSubstring - nSubLength <= 0");
        return NULL;
    }
    const ListItem* pCurrentMain = FindOffsetItem(pMainList, pFirstMain, nSubLength - 1);
    const ListItem* pCurrentSub;
    const ListItem* pLastSub = pSubList->GetTail();
    ERROR3IF(pLastSub == NULL, "FindBitmapSubstring - pLastSub == NULL");

    while (pCurrentMain != NULL)
    {
        pCurrentSub = pLastSub;
        INT32 nCurrentSubLength = 1;        // set as the new length of the substring to check
        while (nCurrentSubLength <= nSubLength)
        {
            KernelBitmap* pMainKernel = (KernelBitmap*)pCurrentMain;
            OILBitmap* pExistingOIL = pMainKernel->ActualBitmap;
            ERROR3IF_NULL_CLASS(pExistingOIL, OILBitmap);
            
            KernelBitmap* pSubKernel = ((ImportBitmap*)pCurrentSub)->pBmp;
            OILBitmap* pSubOIL = pSubKernel->ActualBitmap;
            ERROR3IF_NULL_CLASS(pSubOIL, OILBitmap);

            if (pExistingOIL != pSubOIL && !(*pExistingOIL == *pSubOIL))
                break;

            pCurrentMain = pMainList->GetPrev(pCurrentMain);
            pCurrentSub = pSubList->GetPrev(pCurrentSub);
            ++nCurrentSubLength;
        }

        if (pCurrentSub == pSubList->GetPrev(pFirstSub))        // found the whole sub-list
        {
            return (KernelBitmap*)pCurrentMain;
        }

        // failed to find all the items in SubList so look for the sub-sublist where the
        // disparity was, starting at the next item in the main list.
        pCurrentMain = FindBitmapSubstring( pMainList, pSubList, 
                                pMainList->GetNext(pCurrentMain), pCurrentSub, 
                                nCurrentSubLength);
        if (pCurrentMain == NULL)
        {
            return NULL;
        }
        pCurrentMain = pMainList->GetPrev(pCurrentMain);
        pLastSub = pSubList->GetPrev(pCurrentSub);
    }
    return NULL;
}


/*
INT32 FindSubString(INT32* pMainList, INT32* pSubList, const INT32 pFirstMain, INT32 pFirstSub, INT32 nSubLength)
{
    if (pMainList[pFirstMain] == NULL)
        return 0;

    INT32 pLastMain = FindOffsetItem(pMainList, pFirstMain, nSubLength - 1);
    
    INT32 pLastSub = sizeof(search) / sizeof(INT32) - 2;
    while (1)
    {
        INT32 pCurrentMain = pLastMain;
        INT32 pCurrentSub = pLastSub;
        INT32 nCurrentSubLength = 1;
        while (nCurrentSubLength <= nSubLength)
        {
            if (pMainList[pCurrentMain] != pSubList[pCurrentSub])
                break;
            --pCurrentMain;
            --pCurrentSub;
            ++nCurrentSubLength;
        }
        if (nCurrentSubLength > nSubLength)
        {
            return (pCurrentMain + 1);
        }
        INT32 pFoundMain = FindSubString(pMainList, pSubList, (pCurrentMain + 1), pCurrentSub, nCurrentSubLength);
        if (pFoundMain == NULL)
            return 0;
        pLastMain = pFoundMain;
//      pLastSub = pCurrentSub;
    }
    return NULL;
}

INT32 Find(INT32* pMainList, const INT32 pFirstMain, const INT32 item)
{
    INT32 pCurrent = pFirstMain;
    while (pMainList[pCurrent] != NULL)
    {
        if (item == pMainList[pCurrent])
        {
            return pCurrent;
        }
        ++pCurrent;
    }
    return NULL;
}



INT32 FindSubString(INT32* pMainList, INT32* pSubList, const INT32 pFirstMain)
{
    return FindSubString(array, search, 1, 1, 3);
}
*/

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

>   KernelBitmap* FindBitmapSubstring(List* pMainList, List* pSubList, 
                    ListItem* pFirstMain)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pMainList - the KernelBitmap list in which we wish to find pSubList
                pSubList - the KernelBitmap list we wish to find
                pFirstMain - the KernelBitmap in pMainList from which we wish
                to start searching
    Returns:    A pointer to the first KernelBitmap in pMainList where the matched
                sequence starts.
                NULL if pSubList wasn't found
    Purpose:    Searches for a sequence (string) of bitmaps.

********************************************************************************************/
KernelBitmap* FindBitmapSubstring(List* pMainList, List* pSubList, ListItem* pFirstMain)
{
    return (FindBitmapSubstring(pMainList, pSubList, pFirstMain, pSubList->GetHead(), 
                                pSubList->GetCount()));
}


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

>   KernelBitmap* FindSimple(List* pMainList, List* pSubList, 
                            const ListItem* const pFirstMain)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pMainList - the KernelBitmap list in which we wish to find pSubList
                pSubList - the KernelBitmap list we wish to find
                pFirstMain - the KernelBitmap in pMainList from which we wish
                to start searching
    Returns:    A pointer to the first KernelBitmap in pMainList where the matched
                sequence starts.
                NULL if pSubList wasn't found
    Purpose:    Searches for a sequence (string) of bitmaps. This may be faster than the
                supposedly fast and complicated FindBitmapSubstring(). It was when I
                profiled it.

********************************************************************************************/
KernelBitmap* FindSimple(List* pMainList, List* pSubList, const ListItem* const pFirstMain)
{
    ERROR2IF(pMainList == NULL, NULL, "pMainList == NULL");
    ERROR2IF(pSubList == NULL, NULL, "pSubList == NULL");
    ERROR2IF(pFirstMain == NULL, NULL, "pFirstMain == NULL");

    // Is the list we're looking for empty or longer than the list we're looking in?
    UINT32 uSubListLen = pSubList->GetCount();
    if (uSubListLen == 0 || uSubListLen > pMainList->GetCount())
    {
        return NULL;
    }

    // ...No. So go through the main list looking for the first item in our search list
    // and each time we find it check subsequent items in the main list for a match with
    // those remaining in our search list. If we found them all that's it, otherwise
    // continue looking for the first item in the main list.

    const ListItem* pStartMain = pFirstMain;
    const ListItem* const pFirstSub = pSubList->GetHead();
    for (;;)    // ever
    {
        // Find the first item of the sublist in the main list
        const ListItem* pFound = (ListItem*)FindBitmap(pMainList, (KernelBitmap*)pStartMain, 
                                                    ((ImportBitmap*)pFirstSub)->pBmp);
        if (pFound == NULL)     // the first search item isn't in the main list at all
        {
            return NULL;
        }

        const ListItem* pCurrentMain = pMainList->GetNext(pFound);
        const ListItem* pCurrentSub = pSubList->GetNext(pFirstSub);
        while (pCurrentSub != NULL)
        {
            ERROR3IF(pCurrentMain == NULL, "pCurrentMain == NULL");

            KernelBitmap* pMainKernel = (KernelBitmap*)pCurrentMain;
            OILBitmap* pExistingOIL = pMainKernel->ActualBitmap;
            ERROR3IF_NULL_CLASS(pExistingOIL, OILBitmap);
            
            KernelBitmap* pSubKernel = ((ImportBitmap*)pCurrentSub)->pBmp;
            OILBitmap* pSubOIL = pSubKernel->ActualBitmap;
            ERROR3IF_NULL_CLASS(pSubOIL, OILBitmap);

            if (pExistingOIL != pSubOIL && !(*pExistingOIL == *pSubOIL))
                break;

            pCurrentMain = pMainList->GetNext(pCurrentMain);
            pCurrentSub = pSubList->GetNext(pCurrentSub);
        }
        
        if (pCurrentSub == NULL)        // we reached the end of our search list. All done.
        {
            return (KernelBitmap*)pFound;
        }

        // We didn't manage to find the whole search list, so go back looking for the
        // first item in the search list starting at the next item in the main list
        pStartMain = pMainList->GetNext(pStartMain);
    }
}

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

>   BitmapSequenceInfo* BitmapSequence::GetSequenceInfo() const

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Returns:    The BitmapSequenceInfo for this BitmapSequence
    Purpose:    Er...

********************************************************************************************/
BitmapSequenceInfo* BitmapSequence::GetSequenceInfo() const
{
    return m_pSequenceInfo;
}


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

>   BOOL BitmapSequence::SetSequenceInfo(BitmapSequenceInfo* pNewInfo)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pNewInfo - a pointer
    Returns:    TRUE if set OK
                FALSE otherwise
    Errors:     ERROR3's for invalid args
    Purpose:    To allow for future extensions

********************************************************************************************/
BOOL BitmapSequence::SetSequenceInfo(BitmapSequenceInfo* pNewInfo)
{
    ERROR3IF(pNewInfo != NULL && !pNewInfo->IS_KIND_OF(BitmapSequenceInfo), 
                "BitmapSequence::SetSequenceInfo - pNewInfo isn't");

    m_pSequenceInfo = pNewInfo;
    return TRUE;
}


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

>   UINT32 BitmapSequence::GetCount() const

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Returns:    The number of bitmaps in this BitmapSequence
    Purpose:    You would probably want to know this

********************************************************************************************/
UINT32 BitmapSequence::GetCount() const
{   
    return Bitmaps.GetCount();
}




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

>   KernelBitmap* BitmapSequence::FindInDocumentList(Document* pImportDocument)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/07/96
    Inputs:     pImportDocument - the document in which to search for this BitmapSequence
    Returns:    A pointer to the first KernelBitmap in pMainList where the matched
                sequence starts.
                NULL if pSubList wasn't found
    Purpose:    Searches for this BitmapSequence in pImportDocument's bitmap list

********************************************************************************************/
KernelBitmap* BitmapSequence::FindInDocumentList(Document* pImportDocument)
{
    ERROR2IF(pImportDocument == NULL, FALSE, "pImportDocument NULL");
    ERROR3IF(!pImportDocument->IS_KIND_OF(Document), "BitmapSequence::FindInDocumentList - pImportDocument isn't");

    // First we need to look at the Bitmap List in the document we are Importing
    // into, and if we find a KernelBitmap that points at a bitmap the same as the
    // one we have imported, then we'll just use that.

    // The bitmap system relies on the Current Doc being correct,
    // so we'll set it to be on the safe side
    pImportDocument->SetCurrent();

    // Find this document's BitmapListComponent
    DocComponent* pDocBitmapList = 
                        pImportDocument->GetDocComponent(CC_RUNTIME_CLASS(BitmapListComponent));
    ERROR2IF(pDocBitmapList == NULL, FALSE, "Couldn't find document bitmap list");
    List* pMainList = (List*)((BitmapListComponent*)pDocBitmapList)->GetBitmapList();

    KernelBitmap* pFound;       // the first item in the document list for the match
    // if there's only one bitmap do a simple search for it...
/*  if (GetCount() == 1)
    {
        KernelBitmap* pStart = (KernelBitmap*)pMainList->GetHead();
        KernelBitmap* pBitmap = ((ImportBitmap*)((List*)&Bitmaps)->GetHead())->pBmp;
        pFound = FindBitmap(pMainList, pStart, pBitmap);
    }
    else        // do a hideous search
    {*/
        ListItem* pFirstMain = (ListItem*)pMainList->GetHead();
        List* pNewBitmaps = (List*)&Bitmaps;
        pFound = FindSimple(pMainList, pNewBitmaps, pFirstMain);
//  }

    return pFound;
}

---