bool pt_PieceTable::_lastUndoIsThisFmtMark(PT_DocPosition dpos)
{
// look backwards thru the undo from this point and see
// if we have <InsertFmtMark>[<ChangeFmtMark>*]
PX_ChangeRecord * pcr;
UT_uint32 undoNdx = 0;
while (1)
{
bool bHaveUndo = m_history.getNthUndo(&pcr,undoNdx);
if (!bHaveUndo)
return false;
if (!pcr)
return false;
if (pcr->getPosition() != dpos)
return false;
switch (pcr->getType())
{
default:
return false;
case PX_ChangeRecord::PXT_InsertFmtMark:
return true;
case PX_ChangeRecord::PXT_ChangeFmtMark:
undoNdx++;
break;
}
}
UT_ASSERT_HARMLESS(UT_SHOULD_NOT_HAPPEN);
return false;
}
void px_ChangeHistory::_printHistory(UT_sint32 iPrev) const
{
UT_sint32 i = 0;
UT_sint32 iStop = 0;
UT_sint32 iStart = 0;
if(iPrev>0)
{
iStop =m_undoPosition-1 - iPrev;
iStart = m_undoPosition-1;
}
else
{
iStart = m_vecChangeRecords.getItemCount() -1;
iStop = iStart + iPrev;
}
if(iStop <0)
iStop =0;
for(i=iStart; i>= iStop;i--)
{
PX_ChangeRecord * pcr = m_vecChangeRecords.getNthItem(i);
if(i != (m_undoPosition-m_iAdjustOffset-1))
{
UT_DEBUGMSG((" loc %d pos %d type %d isLocal %d \n",i,pcr->getPosition(),pcr->getType(),pcr->isFromThisDoc()));
}
else
{
UT_DEBUGMSG((" loc %d pos %d type %d isLocal %d <- Current undo record \n",i,pcr->getPosition(),pcr->getType(),pcr->isFromThisDoc()));
}
}
}
void px_ChangeHistory::coalesceHistory(const PX_ChangeRecord * pcr)
{
// coalesce this record with the current undo record.
UT_sint32 iAdj = m_iAdjustOffset;
PX_ChangeRecord * pcrUndo = m_vecChangeRecords.getNthItem(m_undoPosition-1);
UT_return_if_fail (pcrUndo);
UT_return_if_fail (pcr->getType() == pcrUndo->getType());
switch (pcr->getType())
{
case PX_ChangeRecord::PXT_InsertSpan:
case PX_ChangeRecord::PXT_DeleteSpan:
{
const PX_ChangeRecord_Span * pcrSpan = static_cast<const PX_ChangeRecord_Span *>(pcr);
PX_ChangeRecord_Span * pcrSpanUndo = static_cast<PX_ChangeRecord_Span *>(pcrUndo);
if(pcr->isFromThisDoc())
{
_invalidateRedo();
m_iAdjustOffset = 0;
}
else if(iAdj > 0)
{
m_iAdjustOffset = iAdj - 1;
xxx_UT_DEBUGMSG(("AdjustOffset decremented - 3 %d ", m_iAdjustOffset));
}
pcrSpanUndo->coalesce(pcrSpan);
}
return;
default:
UT_ASSERT_HARMLESS(0);
return;
}
}
bool pt_PieceTable::_canCoalesceInsertSpan(PX_ChangeRecord_Span * pcrSpan) const
{
// see if this record can be coalesced with the most recent undo record.
UT_return_val_if_fail (pcrSpan->getType() == PX_ChangeRecord::PXT_InsertSpan, false);
PX_ChangeRecord * pcrUndo;
if (!m_history.getUndo(&pcrUndo,true))
return false;
if (pcrSpan->getType() != pcrUndo->getType())
return false;
if (pcrSpan->getIndexAP() != pcrUndo->getIndexAP())
return false;
PX_ChangeRecord_Span * pcrUndoSpan = static_cast<PX_ChangeRecord_Span *>(pcrUndo);
if((pcrUndoSpan->isFromThisDoc() != pcrSpan->isFromThisDoc()))
return false;
UT_uint32 lengthUndo = pcrUndoSpan->getLength();
if ((pcrUndo->getPosition() + lengthUndo) != pcrSpan->getPosition())
return false;
PT_BufIndex biUndo = pcrUndoSpan->getBufIndex();
PT_BufIndex biSpan = pcrSpan->getBufIndex();
if (m_varset.getBufIndex(biUndo,lengthUndo) != biSpan)
return false;
// "Coalescing not allowed across a save." - PL
// So, if we're clean, make us dirty.
if (!m_history.isDirty())
return false;
return true;
}
bool px_ChangeHistory::getUndo(PX_ChangeRecord ** ppcr, bool bStatic) const
{
if (m_bOverlap)
{
*ppcr = NULL;
return false;
}
UT_sint32 iGLOB = 0;
bool bGotOne = false;
PX_ChangeRecord * pcr = NULL;
PX_ChangeRecord * pcrFirst = NULL;
bool bCorrect = false;
UT_sint32 iAdjust = m_iAdjustOffset;
UT_sint32 iLoop = 0;
// _printHistory(50);
while (!bGotOne)
{
if ((m_undoPosition - m_iAdjustOffset -iLoop) <= m_iMinUndo)
{
if (bStatic)
m_iAdjustOffset = iAdjust;
return false;
}
pcr = m_vecChangeRecords.getNthItem(m_undoPosition-m_iAdjustOffset-1-iLoop);
UT_return_val_if_fail(pcr, false); // just bail out, everything seems wrong
//
// Do Adjustments for blocks of remote CR's. Scan through local globs
// to check for remote CR's which overlap it.
//
if((iGLOB== 0) && !pcr->isFromThisDoc())
{
bCorrect = true;
m_iAdjustOffset++;
UT_DEBUGMSG(("Doing undo iAdjust incremented to %d \n",m_iAdjustOffset));
}
else if ((iGLOB==0) && (pcr->getType() == PX_ChangeRecord::PXT_GlobMarker) && pcr->isFromThisDoc() && !isScanningUndoGLOB() && (m_iAdjustOffset > 0))
{
iGLOB++;
pcrFirst = pcr;
iLoop++;
setScanningUndoGLOB(true);
}
else if((iGLOB>0) && (pcr->getType() == PX_ChangeRecord::PXT_GlobMarker) && pcr->isFromThisDoc())
{
if(isScanningUndoGLOB())
pcr = pcrFirst;
bGotOne = true;
}
else if(iGLOB == 0)
{
bGotOne = true;
if(m_iAdjustOffset > 0)
bCorrect = true;
}
//
// we're here if we've started scanning through a glob in the local
// document to see if it overlaps a later remote change.
//
else
{
PT_DocPosition low, high;
PT_DocPosition lowWork = 0;
PT_DocPosition highWork;
UT_sint32 iAccumOffset = 0;
getCRRange(pcr, low, high);
for (UT_sint32 i = 0; i<m_iAdjustOffset;i++)
{
PX_ChangeRecord *pcrTmp = m_vecChangeRecords.getNthItem(m_undoPosition-i-1);
if (!pcrTmp->isFromThisDoc())
{
UT_sint32 iCur = getDoc()->getAdjustmentForCR(pcrTmp);
if(pcrTmp->getPosition() <= lowWork+iCur)
{
iAccumOffset += iCur;
}
lowWork = low + iAccumOffset;
highWork = high + iAccumOffset;
PT_DocPosition p1,p2;
getCRRange(pcrTmp,p1,p2);
bool bZero = (p1 == p2);
if(bZero)
lowWork++;
if (doesOverlap(pcrTmp,lowWork,highWork))
{
*ppcr = NULL;
//
// OK now we have to invalidate the undo stack
// to just before the first pcr we pulled off.
//
if(m_undoPosition-iAdjust > 0)
{
m_iMinUndo = m_undoPosition-iAdjust-1;
}
else
{
m_iMinUndo = 0;
}
m_iAdjustOffset = iAdjust;
m_iAdjustOffset++;
return false;
}
}
}
iLoop++;
}
}
PX_ChangeRecord * pcrOrig = pcr;
if (bCorrect)
{
pcr->setAdjustment(0);
PT_DocPosition pos = pcr->getPosition();
UT_sint32 iAdj = 0;
UT_sint32 iCurrAdj = 0;
PT_DocPosition low, high;
getCRRange(pcr, low, high);
for (UT_sint32 i = m_iAdjustOffset-1; i>=0;i--)
{
pcr = m_vecChangeRecords.getNthItem(m_undoPosition-i-1);
if (!pcr->isFromThisDoc())
{
iCurrAdj = getDoc()->getAdjustmentForCR(pcr);
if(pcr->getPosition() <= static_cast<PT_DocPosition>(static_cast<UT_sint32>(pos) + iAdj + iCurrAdj))
{
iAdj += iCurrAdj;
low += iCurrAdj;
high += iCurrAdj;
}
PT_DocPosition p1,p2;
getCRRange(pcr,p1,p2);
bool bZero = (p1 == p2);
PT_DocPosition low1 = low;
if(bZero)
low1++;
if (doesOverlap(pcr,low1,high))
{
UT_DEBUGMSG(("CR Type %d adj pos %d Overlaps found with CR pos %d \n",pcrOrig->getType(),pcrOrig->getPosition()+iAdj,pcr->getPosition()));
UT_DEBUGMSG((" Orig Adj low %d high %d \n",low,high));
*ppcr = NULL;
m_iMinUndo = m_undoPosition-m_iAdjustOffset-1;
return false;
}
}
}
pcrOrig->setAdjustment(iAdj);
m_iAdjustOffset++;
}
UT_ASSERT(pcrOrig->isFromThisDoc());
*ppcr = pcrOrig;
if(bStatic)
m_iAdjustOffset = iAdjust;
return true;
}
