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Object stastistics (first part)

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Jakub Melka
2021-06-18 19:06:11 +02:00
parent 7264a45e30
commit b8464ed4fa
18 changed files with 530 additions and 26 deletions
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55
Pdf4QtLib/sources/pdfobjectutils.cpp
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@ -17,6 +17,8 @@
#include "pdfobjectutils.h"
#include "pdfvisitor.h"
#include "pdfexecutionpolicy.h"
#include "pdfdocumentwriter.h"
namespace pdf
{
@ -362,6 +364,59 @@ std::vector<PDFObjectReference> PDFObjectClassifier::getObjectsByType(Type type)
return result;
}
PDFObjectClassifier::Statistics PDFObjectClassifier::calculateStatistics(const PDFDocument* document) const
{
Statistics result;
// Jakub Melka: prepare statistics map
result.statistics[None];
for (uint i = 0; i < 32; ++i)
{
uint32_t mask = 1 << i;
if (m_allTypesUsed & mask)
{
result.statistics[Type(mask)];
}
}
auto processEntry = [document, &result](const Classification& entry)
{
const PDFObject& object = document->getObjectByReference(entry.reference);
if (object.isNull())
{
return;
}
Type type = Type(uint32_t(entry.types));
if (!result.statistics.count(type))
{
type = None;
}
Q_ASSERT(result.statistics.count(type));
const qint64 objectSize = PDFDocumentWriter::getObjectSize(document, entry.reference);
StatisticsItem& statisticsItem = result.statistics.at(type);
statisticsItem.count.fetch_add(1);
statisticsItem.bytes.fetch_add(objectSize);
};
PDFExecutionPolicy::execute(PDFExecutionPolicy::Scope::Unknown, m_classification.cbegin(), m_classification.cend(), processEntry);
PDFStatisticsCollector collector;
PDFApplyVisitor(*document, &collector);
for (PDFObject::Type objectType : PDFObject::getTypes())
{
result.objectCountByType[size_t(objectType)] = collector.getObjectCount(objectType);
}
return result;
}
void PDFObjectClassifier::mark(PDFObjectReference reference, Type type)
{
Q_ASSERT(hasObject(reference));