vector<string> PDFModifiedPage::WriteModifiedResourcesDict(PDFParser* inParser,PDFDictionary* inResourcesDictionary,ObjectsContext& inObjectContext,PDFDocumentCopyingContext* inCopyingContext)
{
vector<string> formResourcesNames;
MapIterator<PDFNameToPDFObjectMap> resourcesDictionaryIt = inResourcesDictionary->GetIterator();
// create modified page object
DictionaryContext* dict = mWriter->GetObjectsContext().StartDictionary();
// copy all elements of the page to the new page object, but the "Contents" and "Resources" elements
while(resourcesDictionaryIt.MoveNext())
{
if(resourcesDictionaryIt.GetKey()->GetValue() != "XObject")
{
dict->WriteKey(resourcesDictionaryIt.GetKey()->GetValue());
inCopyingContext->CopyDirectObjectAsIs(resourcesDictionaryIt.GetValue());
}
}
// now write a new xobject entry.
dict->WriteKey("XObject");
DictionaryContext* xobjectDict = inObjectContext.StartDictionary();
PDFObjectCastPtr<PDFDictionary> existingXObjectDict(inParser->QueryDictionaryObject(inResourcesDictionary,"XObject"));
string imageObjectName;
if(existingXObjectDict.GetPtr())
{
// i'm having a very sophisticated algo here to create a new unique name.
// i'm making sure it's different in one letter from any name, using a well known discrete math proof method
MapIterator<PDFNameToPDFObjectMap> itExisting = existingXObjectDict->GetIterator();
unsigned long i=0;
while(itExisting.MoveNext())
{
string name = itExisting.GetKey()->GetValue();
xobjectDict->WriteKey(name);
inCopyingContext->CopyDirectObjectAsIs(itExisting.GetValue());
imageObjectName.push_back((char)(GetDifferentChar((name.length() >= i+1) ? name[i]:0x39)));
++i;
}
inObjectContext.EndLine();
}
PDFFormXObjectVector::iterator itForms = mContenxts.begin();
imageObjectName.push_back('_');
for(int i=0;itForms != mContenxts.end();++i,++itForms)
{
string formObjectName = imageObjectName + Int(i).ToString();
xobjectDict->WriteKey(formObjectName);
xobjectDict->WriteObjectReferenceValue((*itForms)->GetObjectID());
formResourcesNames.push_back(formObjectName);
}
inObjectContext.EndDictionary(xobjectDict);
inObjectContext.EndDictionary(dict);
return formResourcesNames;
}
vector<string> PDFModifiedPage::WriteNewResourcesDictionary(ObjectsContext& inObjectContext) {
vector<string> formResourcesNames;
// no existing resource dictionary, so write a new one
DictionaryContext* dict = inObjectContext.StartDictionary();
dict->WriteKey("XObject");
DictionaryContext* xobjectDict = inObjectContext.StartDictionary();
for (unsigned long i = 0; i<mContenxts.size(); ++i)
{
string formObjectName = string("myForm_") + Int(i).ToString();
dict->WriteKey(formObjectName);
dict->WriteObjectReferenceValue(mContenxts[i]->GetObjectID());
formResourcesNames.push_back(formObjectName);
}
inObjectContext.EndDictionary(xobjectDict);
inObjectContext.EndDictionary(dict);
return formResourcesNames;
}
EStatusCodeAndObjectIDType PDFCommentWriter::WriteCommentsTree(PDFComment* inComment)
{
EStatusCodeAndObjectIDType result;
ObjectIDType repliedTo = 0;
// if already written, return
PDFCommentToObjectIDTypeMap::iterator it = mCommentsForNextPage.find(inComment);
if(it != mCommentsForNextPage.end())
{
result.first = eSuccess;
result.second = it->second;
return result;
}
// if has a referred comment, write it first
if(inComment->ReplyTo != NULL)
{
EStatusCodeAndObjectIDType repliedtoResult = WriteCommentsTree(inComment->ReplyTo);
if(repliedtoResult.first != eSuccess)
{
result.first = eFailure;
result.second = 0;
return result;
}
else
repliedTo = repliedtoResult.second;
}
do
{
ObjectsContext& objectsContext = mPDFWriter->GetObjectsContext();
// Start new InDirect object for annotation dictionary
result.second = objectsContext.StartNewIndirectObject();
DictionaryContext* dictionaryContext = objectsContext.StartDictionary();
// Type
dictionaryContext->WriteKey("Type");
dictionaryContext->WriteNameValue("Annot");
// SubType
dictionaryContext->WriteKey("Subtype");
dictionaryContext->WriteNameValue("Text");
// Rect
dictionaryContext->WriteKey("Rect");
dictionaryContext->WriteRectangleValue(
PDFRectangle(inComment->FrameBoundings[0],
inComment->FrameBoundings[1],
inComment->FrameBoundings[2],
inComment->FrameBoundings[3]));
// Contents
dictionaryContext->WriteKey("Contents");
dictionaryContext->WriteLiteralStringValue(PDFTextString(inComment->Text).ToString());
// C (color)
dictionaryContext->WriteKey("C");
objectsContext.StartArray();
if(inComment->Color.UseCMYK)
{
objectsContext.WriteDouble((double)inComment->Color.CMYKComponents[0]/255);
objectsContext.WriteDouble((double)inComment->Color.CMYKComponents[1]/255);
objectsContext.WriteDouble((double)inComment->Color.CMYKComponents[2]/255);
objectsContext.WriteDouble((double)inComment->Color.CMYKComponents[3]/255);
}
else
{
objectsContext.WriteDouble((double)inComment->Color.RGBComponents[0]/255);
objectsContext.WriteDouble((double)inComment->Color.RGBComponents[1]/255);
objectsContext.WriteDouble((double)inComment->Color.RGBComponents[2]/255);
}
objectsContext.EndArray(eTokenSeparatorEndLine);
// T
dictionaryContext->WriteKey("T");
dictionaryContext->WriteLiteralStringValue(PDFTextString(inComment->CommentatorName).ToString());
// M
dictionaryContext->WriteKey("M");
dictionaryContext->WriteLiteralStringValue(inComment->Time.ToString());
if(inComment->ReplyTo != NULL)
{
// IRT
dictionaryContext->WriteKey("IRT");
dictionaryContext->WriteObjectReferenceValue(repliedTo);
// RT (we're doing always "reply" at this point, being a reply to comment
dictionaryContext->WriteKey("RT");
dictionaryContext->WriteNameValue("R");
}
// Open (we'll have them all closed to begin with)
dictionaryContext->WriteKey("Open");
dictionaryContext->WriteBooleanValue(false);
// Name
dictionaryContext->WriteKey("Name");
dictionaryContext->WriteNameValue("Comment");
if(objectsContext.EndDictionary(dictionaryContext) != eSuccess)
{
result.first = eFailure;
TRACE_LOG("PDFCommentWriter::WriteCommentsTree, Exception in ending comment dictionary");
break;
}
objectsContext.EndIndirectObject();
mCommentsForNextPage.insert(PDFCommentToObjectIDTypeMap::value_type(inComment,result.second));
result.first = eSuccess;
}while(false);
return result;
}
EStatusCode PDFWriter::Shutdown(const string& inStateFilePath)
{
EStatusCode status;
do
{
StateWriter writer;
status = writer.Start(inStateFilePath);
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("PDFWriter::Shutdown, cant start state writing");
break;
}
ObjectIDType rootObjectID = writer.GetObjectsWriter()->StartNewIndirectObject();
DictionaryContext* pdfWriterDictionary = writer.GetObjectsWriter()->StartDictionary();
pdfWriterDictionary->WriteKey("Type");
pdfWriterDictionary->WriteNameValue("PDFWriter");
ObjectIDType objectsContextID = writer.GetObjectsWriter()->GetInDirectObjectsRegistry().AllocateNewObjectID();
ObjectIDType DocumentContextID = writer.GetObjectsWriter()->GetInDirectObjectsRegistry().AllocateNewObjectID();
pdfWriterDictionary->WriteKey("mObjectsContext");
pdfWriterDictionary->WriteObjectReferenceValue(objectsContextID);
pdfWriterDictionary->WriteKey("mDocumentContext");
pdfWriterDictionary->WriteObjectReferenceValue(DocumentContextID);
writer.GetObjectsWriter()->EndDictionary(pdfWriterDictionary);
writer.GetObjectsWriter()->EndIndirectObject();
writer.SetRootObject(rootObjectID);
status = mObjectsContext.WriteState(writer.GetObjectsWriter(),objectsContextID);
if(status != PDFHummus::eSuccess)
break;
status = mDocumentContext.WriteState(writer.GetObjectsWriter(),DocumentContextID);
if(status != PDFHummus::eSuccess)
break;
status = writer.Finish();
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("PDFWriter::Shutdown, cant finish state writing");
}
}while(false);
if(status != PDFHummus::eSuccess)
{
mOutputFile.CloseFile();
TRACE_LOG("PDFWriter::Shutdown, Could not end PDF");
}
else
status = mOutputFile.CloseFile();
ReleaseLog();
return status;
}
EStatusCode DescendentFontWriter::WriteFont( ObjectIDType inDecendentObjectID,
const string& inFontName,
FreeTypeFaceWrapper& inFontInfo,
const UIntAndGlyphEncodingInfoVector& inEncodedGlyphs,
ObjectsContext* inObjectsContext,
IDescendentFontWriter* inDescendentFontWriterHelper)
{
EStatusCode status = PDFHummus::eSuccess;
FontDescriptorWriter fontDescriptorWriter;
inObjectsContext->StartNewIndirectObject(inDecendentObjectID);
mFontInfo = &inFontInfo;
mObjectsContext = inObjectsContext;
mCIDSetObjectID = 0;
do
{
DictionaryContext* fontContext = inObjectsContext->StartDictionary();
// Type
fontContext->WriteKey(scType);
fontContext->WriteNameValue(scFont);
// SubType
fontContext->WriteKey(scSubtype);
inDescendentFontWriterHelper->WriteSubTypeValue(fontContext);
// BaseFont
fontContext->WriteKey(scBaseFont);
fontContext->WriteNameValue(inFontName);
WriteWidths(inEncodedGlyphs,fontContext);
// CIDSystemInfo
fontContext->WriteKey(scCIDSystemInfo);
ObjectIDType cidSystemInfoObjectID = mObjectsContext->GetInDirectObjectsRegistry().AllocateNewObjectID();
fontContext->WriteObjectReferenceValue(cidSystemInfoObjectID);
// FontDescriptor
fontContext->WriteKey(scFontDescriptor);
ObjectIDType fontDescriptorObjectID = mObjectsContext->GetInDirectObjectsRegistry().AllocateNewObjectID();
fontContext->WriteObjectReferenceValue(fontDescriptorObjectID);
// free dictionary end writing
inDescendentFontWriterHelper->WriteAdditionalKeys(fontContext);
status = inObjectsContext->EndDictionary(fontContext);
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("CFFANSIFontWriter::WriteFont, unexpected failure. Failed to end dictionary in font write.");
break;
}
inObjectsContext->EndIndirectObject();
WriteCIDSystemInfo(cidSystemInfoObjectID);
mWriterHelper = inDescendentFontWriterHelper; // save the helper pointer, to write the font program reference in the descriptor
fontDescriptorWriter.WriteFontDescriptor(fontDescriptorObjectID,inFontName,&inFontInfo,inEncodedGlyphs,inObjectsContext,this);
if(mCIDSetObjectID) // set by descriptor writer callback
WriteCIDSet(inEncodedGlyphs);
}while(false);
return status;
}
PDFHummus::EStatusCode PDFModifiedPage::WritePage()
{
EStatusCode status = EndContentContext(); // just in case someone forgot to close the latest content context
do {
if (status != eSuccess || !mIsDirty) {
break;
}
// allocate an object ID for the new contents stream (for placing the form)
// we first create the modified page object, so that we can define a name for the new form xobject
// that is unique
ObjectsContext& objectContext = mWriter->GetObjectsContext();
ObjectIDType newContentObjectID = objectContext.GetInDirectObjectsRegistry().AllocateNewObjectID();
ObjectIDType newEncapsulatingObjectID = 0;
// create a copying context, so we can copy the page dictionary, and modify its contents + resources dict
PDFDocumentCopyingContext* copyingContext = mWriter->CreatePDFCopyingContextForModifiedFile();
// get the page object
ObjectIDType pageObjectID = copyingContext->GetSourceDocumentParser()->GetPageObjectID(mPageIndex);
PDFObjectCastPtr<PDFDictionary> pageDictionaryObject = copyingContext->GetSourceDocumentParser()->ParsePage(mPageIndex);
MapIterator<PDFNameToPDFObjectMap> pageDictionaryObjectIt = pageDictionaryObject->GetIterator();
// create modified page object
objectContext.StartModifiedIndirectObject(pageObjectID);
DictionaryContext* modifiedPageObject = mWriter->GetObjectsContext().StartDictionary();
// copy all elements of the page to the new page object, but the "Contents", "Resources" and "Annots" elements
while (pageDictionaryObjectIt.MoveNext())
{
if (pageDictionaryObjectIt.GetKey()->GetValue() != "Resources" &&
pageDictionaryObjectIt.GetKey()->GetValue() != "Contents" &&
pageDictionaryObjectIt.GetKey()->GetValue() != "Annots")
{
modifiedPageObject->WriteKey(pageDictionaryObjectIt.GetKey()->GetValue());
copyingContext->CopyDirectObjectAsIs(pageDictionaryObjectIt.GetValue());
}
}
// Write new annotations entry, joining existing annotations, and new ones (from links attaching or what not)
if (pageDictionaryObject->Exists("Annots") || mWriter->GetDocumentContext().GetAnnotations().size() > 0)
{
modifiedPageObject->WriteKey("Annots");
objectContext.StartArray();
// write old annots, if any exist
if(pageDictionaryObject->Exists("Annots")) {
PDFObjectCastPtr<PDFArray> anArray(copyingContext->GetSourceDocumentParser()->QueryDictionaryObject(pageDictionaryObject.GetPtr(), "Annots"));
SingleValueContainerIterator<PDFObjectVector> refs = anArray->GetIterator();
while (refs.MoveNext())
copyingContext->CopyDirectObjectAsIs(refs.GetItem());
}
// write new annots from links
ObjectIDTypeSet& annotations = mWriter->GetDocumentContext().GetAnnotations();
if (annotations.size() > 0)
{
ObjectIDTypeSet::iterator it = annotations.begin();
for (; it != annotations.end(); ++it)
objectContext.WriteNewIndirectObjectReference(*it);
}
annotations.clear();
objectContext.EndArray(eTokenSeparatorEndLine);
}
// Write new contents entry, joining the existing contents with the new one. take care of various scenarios of the existing Contents
modifiedPageObject->WriteKey("Contents");
if (!pageDictionaryObject->Exists("Contents"))
{ // no contents
objectContext.WriteIndirectObjectReference(newContentObjectID);
}
else
{
objectContext.StartArray();
if (mEnsureContentEncapsulation)
{
newEncapsulatingObjectID = objectContext.GetInDirectObjectsRegistry().AllocateNewObjectID();
objectContext.WriteNewIndirectObjectReference(newEncapsulatingObjectID);
}
RefCountPtr<PDFObject> pageContent(copyingContext->GetSourceDocumentParser()->QueryDictionaryObject(pageDictionaryObject.GetPtr(), "Contents"));
if (pageContent->GetType() == PDFObject::ePDFObjectStream)
{
// single content stream. must be a refrence which points to it
PDFObjectCastPtr<PDFIndirectObjectReference> ref(pageDictionaryObject->QueryDirectObject("Contents"));
objectContext.WriteIndirectObjectReference(ref->mObjectID, ref->mVersion);
}
else if (pageContent->GetType() == PDFObject::ePDFObjectArray)
{
PDFArray* anArray = (PDFArray*)pageContent.GetPtr();
// multiple content streams
SingleValueContainerIterator<PDFObjectVector> refs = anArray->GetIterator();
PDFObjectCastPtr<PDFIndirectObjectReference> ref;
while (refs.MoveNext())
{
ref = refs.GetItem();
objectContext.WriteIndirectObjectReference(ref->mObjectID, ref->mVersion);
}
}
else {
// this basically means no content...or whatever. just ignore.
}
objectContext.WriteNewIndirectObjectReference(newContentObjectID);
objectContext.EndArray();
objectContext.EndLine();
}
// Write a new resource entry. copy all but the "XObject" entry, which needs to be modified. Just for kicks i'm keeping the original
// form (either direct dictionary, or indirect object)
ObjectIDType resourcesIndirect = 0;
ObjectIDType newResourcesIndirect = 0;
vector<string> formResourcesNames;
modifiedPageObject->WriteKey("Resources");
if (!pageDictionaryObject->Exists("Resources"))
{
// check if there's inherited dict. if so - write directly as a modified version
PDFObjectCastPtr<PDFDictionary> parentDict(
pageDictionaryObject->Exists("Parent") ?
copyingContext->GetSourceDocumentParser()->QueryDictionaryObject(pageDictionaryObject.GetPtr(), "Parent"):
NULL);
if(!parentDict) {
formResourcesNames = WriteNewResourcesDictionary(objectContext);
}
else {
PDFObjectCastPtr<PDFDictionary> inheritedResources = findInheritedResources(copyingContext->GetSourceDocumentParser(),parentDict.GetPtr());
if(!inheritedResources) {
formResourcesNames = WriteNewResourcesDictionary(objectContext);
} else {
formResourcesNames = WriteModifiedResourcesDict(copyingContext->GetSourceDocumentParser(), inheritedResources.GetPtr(), objectContext, copyingContext);
}
}
}
else
{
// resources may be direct, or indirect. if direct, write as is, adding the new form xobject, otherwise wait till page object ends and write then
PDFObjectCastPtr<PDFIndirectObjectReference> resourceDictRef(pageDictionaryObject->QueryDirectObject("Resources"));
if (!resourceDictRef)
{
PDFObjectCastPtr<PDFDictionary> resourceDict(pageDictionaryObject->QueryDirectObject("Resources"));
formResourcesNames = WriteModifiedResourcesDict(copyingContext->GetSourceDocumentParser(), resourceDict.GetPtr(), objectContext, copyingContext);
}
else
{
resourcesIndirect = resourceDictRef->mObjectID;
// later will write a modified version of the resources dictionary, with the new form.
// only modify the resources dict object if wasn't already modified (can happen when sharing resources dict between multiple pages).
// in the case where it was alrady modified, create a new resources dictionary that's a copy, and use it instead, to avoid overwriting
// the previous modification
GetObjectWriteInformationResult res = objectContext.GetInDirectObjectsRegistry().GetObjectWriteInformation(resourcesIndirect);
if (res.first && res.second.mIsDirty)
{
newResourcesIndirect = objectContext.GetInDirectObjectsRegistry().AllocateNewObjectID();
modifiedPageObject->WriteObjectReferenceValue(newResourcesIndirect);
}
else
modifiedPageObject->WriteObjectReferenceValue(resourcesIndirect);
}
}
objectContext.EndDictionary(modifiedPageObject);
objectContext.EndIndirectObject();
if (resourcesIndirect != 0)
{
if (newResourcesIndirect != 0)
objectContext.StartNewIndirectObject(newResourcesIndirect);
else
objectContext.StartModifiedIndirectObject(resourcesIndirect);
PDFObjectCastPtr<PDFDictionary> resourceDict(copyingContext->GetSourceDocumentParser()->ParseNewObject(resourcesIndirect));
formResourcesNames = WriteModifiedResourcesDict(copyingContext->GetSourceDocumentParser(), resourceDict.GetPtr(), objectContext, copyingContext);
objectContext.EndIndirectObject();
}
// if required write encapsulation code, so that new stream is independent of graphic context of original
PDFStream* newStream;
PrimitiveObjectsWriter primitivesWriter;
if (newEncapsulatingObjectID != 0)
{
objectContext.StartNewIndirectObject(newEncapsulatingObjectID);
newStream = objectContext.StartPDFStream();
primitivesWriter.SetStreamForWriting(newStream->GetWriteStream());
primitivesWriter.WriteKeyword("q");
objectContext.EndPDFStream(newStream);
}
// last but not least, create the actual content stream object, placing the form
objectContext.StartNewIndirectObject(newContentObjectID);
newStream = objectContext.StartPDFStream();
primitivesWriter.SetStreamForWriting(newStream->GetWriteStream());
if (newEncapsulatingObjectID != 0) {
primitivesWriter.WriteKeyword("Q");
}
vector<string>::iterator it = formResourcesNames.begin();
for (; it != formResourcesNames.end(); ++it)
{
primitivesWriter.WriteKeyword("q");
primitivesWriter.WriteInteger(1);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteInteger(1);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteKeyword("cm");
primitivesWriter.WriteName(*it);
primitivesWriter.WriteKeyword("Do");
primitivesWriter.WriteKeyword("Q");
}
objectContext.EndPDFStream(newStream);
} while (false);
return status;
}
