PdfAnnotation* PdfPage::GetAnnotation( int index )
{
PdfAnnotation* pAnnot;
PdfReference ref;
PdfObject* pObj = this->GetAnnotationsArray( false );
if( !(pObj && pObj->IsArray()) )
{
PODOFO_RAISE_ERROR( ePdfError_InvalidDataType );
}
if( index < 0 && static_cast<unsigned int>(index) >= pObj->GetArray().size() )
{
PODOFO_RAISE_ERROR( ePdfError_ValueOutOfRange );
}
ref = pObj->GetArray()[index].GetReference();
pAnnot = m_mapAnnotations[ref];
if( !pAnnot )
{
pObj = m_pObject->GetOwner()->GetObject( ref );
if( !pObj )
{
PdfError::DebugMessage( "Error looking up object %i %i R\n", ref.ObjectNumber(), ref.GenerationNumber() );
PODOFO_RAISE_ERROR( ePdfError_NoObject );
}
pAnnot = new PdfAnnotation( pObj, this );
m_mapAnnotations[ref] = pAnnot;
}
return pAnnot;
}
void PdfXRef::AddObject( const PdfReference & rRef, pdf_uint64 offset, bool bUsed )
{
TIVecXRefBlock it = m_vecBlocks.begin();
PdfXRef::TXRefItem item( rRef, offset );
bool bInsertDone = false;
while( it != m_vecBlocks.end() )
{
if( (*it).InsertItem( item, bUsed ) )
{
bInsertDone = true;
break;
}
++it;
}
if( !bInsertDone )
{
PdfXRefBlock block;
block.m_nFirst = rRef.ObjectNumber();
block.m_nCount = 1;
if( bUsed )
block.items.push_back( item );
else
block.freeItems.push_back( rRef );
m_vecBlocks.push_back( block );
std::sort( m_vecBlocks.begin(), m_vecBlocks.end() );
}
}
void PdfVecObjects::AddFreeObject( const PdfReference & rReference )
{
std::pair<TIPdfReferenceList,TIPdfReferenceList> it =
std::equal_range( m_lstFreeObjects.begin(), m_lstFreeObjects.end(), rReference, ReferenceComparatorPredicate() );
if( it.first != it.second && !m_lstFreeObjects.empty() )
{
// Be sure that no reference is added twice to free list
PdfError::DebugMessage( "Adding %d to freelist, is already contained !!", rReference.ObjectNumber() );
return;
}
else
{
// When append free objects from external doc we need plus one number objects
SetObjectCount( rReference );
// Insert so that list stays sorted
m_lstFreeObjects.insert( it.first, rReference );
}
}
PdfObject* PdfPagesTree::GetPageNode( int nPageNum, PdfObject* pParent,
PdfObjectList & rLstParents )
{
if( !pParent )
{
PODOFO_RAISE_ERROR( ePdfError_InvalidHandle );
}
if( !pParent->GetDictionary().HasKey( PdfName("Kids") ) )
{
PODOFO_RAISE_ERROR( ePdfError_InvalidKey );
}
const PdfObject* pObj = pParent->GetIndirectKey( "Kids" );
if( pObj == NULL || !pObj->IsArray() )
{
PODOFO_RAISE_ERROR( ePdfError_InvalidDataType );
}
const PdfArray & rKidsArray = pObj->GetArray();
PdfArray::const_iterator it = rKidsArray.begin();
const size_t numDirectKids = rKidsArray.size();
const size_t numKids = GetChildCount(pParent);
// use <= since nPageNum is 0-based
if( static_cast<int>(numKids) <= nPageNum )
{
PdfError::LogMessage( eLogSeverity_Critical,
"Cannot retrieve page %i from a document with only %i pages.",
nPageNum, static_cast<int>(numKids) );
return NULL;
}
//printf("Fetching: %i %i %i\n", numDirectKids, numKids, nPageNum );
if( numDirectKids == numKids && static_cast<size_t>(nPageNum) < numDirectKids )
{
// This node has only page nodes as kids,
// so we can access the array directly
rLstParents.push_back( pParent );
return GetPageNodeFromArray( nPageNum, rKidsArray, rLstParents );
}
else
{
// We have to traverse the tree
while( it != rKidsArray.end() )
{
if( (*it).IsArray() )
{ // Fixes PDFs broken by having trees with arrays nested once
rLstParents.push_back( pParent );
// the following code is to find the reference to log this with
const PdfReference & rIterArrayRef = (*it).Reference();
PdfReference refToLog;
bool isDirectObject // don't worry about 0-num. indirect ones
= ( !(rIterArrayRef.ObjectNumber() ) );
if ( isDirectObject )
{
if ( !(pObj->Reference().ObjectNumber() ) ) // rKidsArray's
{
refToLog = pParent->Reference();
}
else
{
refToLog = pObj->Reference();
}
}
else
{
refToLog = rIterArrayRef;
}
PdfError::LogMessage( eLogSeverity_Error,
"Entry in Kids array is itself an array"
"%s reference: %s\n", isDirectObject ? " (direct object)"
", in object with" : ",", refToLog.ToString().c_str() );
const PdfArray & rIterArray = (*it).GetArray();
// is the array large enough to potentially have the page?
if( static_cast<size_t>(nPageNum) < rIterArray.GetSize() )
{
PdfObject* pPageNode = GetPageNodeFromArray( nPageNum,
rIterArray, rLstParents );
if ( pPageNode ) // and if not, search further
return pPageNode;
}
}
else if( (*it).IsReference() )
{
PdfObject* pChild = GetRoot()->GetOwner()->GetObject( (*it).GetReference() );
if (!pChild)
{
PdfError::LogMessage( eLogSeverity_Critical, "Requesting page index %i. Child not found: %s\n",
nPageNum, (*it).GetReference().ToString().c_str());
return NULL;
}
if( this->IsTypePages(pChild) )
{
int childCount = GetChildCount( pChild );
if( childCount < nPageNum + 1 ) // Pages are 0 based, but count is not
{
// skip this page node
// and go to the next one
nPageNum -= childCount;
}
else
{
rLstParents.push_back( pParent );
return this->GetPageNode( nPageNum, pChild, rLstParents );
}
}
else if( this->IsTypePage(pChild) )
{
if( 0 == nPageNum )
{
rLstParents.push_back( pParent );
return pChild;
}
// Skip a normal page
if(nPageNum > 0 )
nPageNum--;
}
else
{
const PdfReference & rLogRef = pChild->Reference();
pdf_objnum nLogObjNum = rLogRef.ObjectNumber();
pdf_gennum nLogGenNum = rLogRef.GenerationNumber();
PdfError::LogMessage( eLogSeverity_Critical,
"Requesting page index %i. "
"Invalid datatype referenced in kids array: %s\n"
"Reference to invalid object: %i %i R\n", nPageNum,
pChild->GetDataTypeString(), nLogObjNum, nLogGenNum);
}
}
else
{
PdfError::LogMessage( eLogSeverity_Critical, "Requesting page index %i. Invalid datatype in kids array: %s\n",
nPageNum, (*it).GetDataTypeString());
return NULL;
}
++it;
}
}
return NULL;
}