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Issue #40: Sanitize document

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Jakub Melka
2023-02-19 18:36:46 +01:00
parent 4a603c80c0
commit 361ee247e5
19 changed files with 1089 additions and 243 deletions
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114
Pdf4QtLib/sources/pdfoptimizer.cpp
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@ -28,120 +28,6 @@
namespace pdf
{
class PDFUpdateObjectVisitor : public PDFAbstractVisitor
{
public:
explicit inline PDFUpdateObjectVisitor(const PDFObjectStorage* storage) :
m_storage(storage)
{
m_objectStack.reserve(32);
}
virtual void visitNull() override;
virtual void visitBool(bool value) override;
virtual void visitInt(PDFInteger value) override;
virtual void visitReal(PDFReal value) override;
virtual void visitString(PDFStringRef string) override;
virtual void visitName(PDFStringRef name) override;
virtual void visitArray(const PDFArray* array) override;
virtual void visitDictionary(const PDFDictionary* dictionary) override;
virtual void visitStream(const PDFStream* stream) override;
virtual void visitReference(const PDFObjectReference reference) override;
PDFObject getObject();
protected:
const PDFObjectStorage* m_storage;
std::vector<PDFObject> m_objectStack;
};
void PDFUpdateObjectVisitor::visitNull()
{
m_objectStack.push_back(PDFObject::createNull());
}
void PDFUpdateObjectVisitor::visitBool(bool value)
{
m_objectStack.push_back(PDFObject::createBool(value));
}
void PDFUpdateObjectVisitor::visitInt(PDFInteger value)
{
m_objectStack.push_back(PDFObject::createInteger(value));
}
void PDFUpdateObjectVisitor::visitReal(PDFReal value)
{
m_objectStack.push_back(PDFObject::createReal(value));
}
void PDFUpdateObjectVisitor::visitString(PDFStringRef string)
{
m_objectStack.push_back(PDFObject::createString(string));
}
void PDFUpdateObjectVisitor::visitName(PDFStringRef name)
{
m_objectStack.push_back(PDFObject::createName(name));
}
void PDFUpdateObjectVisitor::visitArray(const PDFArray* array)
{
acceptArray(array);
// We have all objects on the stack
Q_ASSERT(array->getCount() <= m_objectStack.size());
auto it = std::next(m_objectStack.cbegin(), m_objectStack.size() - array->getCount());
std::vector<PDFObject> objects(it, m_objectStack.cend());
PDFObject object = PDFObject::createArray(std::make_shared<PDFArray>(qMove(objects)));
m_objectStack.erase(it, m_objectStack.cend());
m_objectStack.push_back(object);
}
void PDFUpdateObjectVisitor::visitDictionary(const PDFDictionary* dictionary)
{
Q_ASSERT(dictionary);
std::vector<PDFDictionary::DictionaryEntry> entries;
entries.reserve(dictionary->getCount());
for (size_t i = 0, count = dictionary->getCount(); i < count; ++i)
{
dictionary->getValue(i).accept(this);
Q_ASSERT(!m_objectStack.empty());
entries.emplace_back(dictionary->getKey(i), m_objectStack.back());
m_objectStack.pop_back();
}
m_objectStack.push_back(PDFObject::createDictionary(std::make_shared<PDFDictionary>(qMove(entries))));
}
void PDFUpdateObjectVisitor::visitStream(const PDFStream* stream)
{
const PDFDictionary* dictionary = stream->getDictionary();
visitDictionary(dictionary);
Q_ASSERT(!m_objectStack.empty());
PDFObject dictionaryObject = m_objectStack.back();
m_objectStack.pop_back();
PDFDictionary newDictionary(*dictionaryObject.getDictionary());
m_objectStack.push_back(PDFObject::createStream(std::make_shared<PDFStream>(qMove(newDictionary), QByteArray(*stream->getContent()))));
}
void PDFUpdateObjectVisitor::visitReference(const PDFObjectReference reference)
{
m_objectStack.push_back(PDFObject::createReference(reference));
}
PDFObject PDFUpdateObjectVisitor::getObject()
{
Q_ASSERT(m_objectStack.size() == 1);
return qMove(m_objectStack.back());
}
class PDFRemoveSimpleObjectsVisitor : public PDFUpdateObjectVisitor
{
public: