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Page parsing acc. to PDF 2.0 specification

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This commit is contained in:
Jakub Melka
2020-08-01 15:53:54 +02:00
parent 9b1deea238
commit 534ff8e814
2 changed files with 218 additions and 0 deletions
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93
PdfForQtLib/sources/pdfpage.cpp
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@ -18,6 +18,7 @@
#include "pdfpage.h"
#include "pdfdocument.h"
#include "pdfexception.h"
#include "pdfencoding.h"
namespace pdf
{
@ -131,6 +132,76 @@ QRectF PDFPage::getRotatedCropBox() const
return getRotatedBox(getCropBox(), getPageRotation());
}
PDFObject PDFPage::getObjectFromPageDictionary(const PDFObjectStorage* storage, const char* key) const
{
if (const PDFDictionary* dictionary = storage->getDictionaryFromObject(m_pageObject))
{
return dictionary->get(key);
}
return PDFObject();
}
PDFObject PDFPage::getBoxColorInfo(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "BoxColorInfo");
}
PDFObject PDFPage::getTransparencyGroup(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "Group");
}
PDFObject PDFPage::getThumbnail(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "Thumb");
}
PDFObject PDFPage::getTransition(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "Trans");
}
PDFObject PDFPage::getAdditionalActions(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "AA");
}
PDFObject PDFPage::getMetadata(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "Metadata");
}
PDFObject PDFPage::getPieceDictionary(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "PieceInfo");
}
PDFObject PDFPage::getColorSeparationInfo(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "SeparationInfo");
}
PDFObject PDFPage::getFirstSubpageNavigationNode(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "PresSteps");
}
PDFObject PDFPage::getViewports(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "VP");
}
PDFObject PDFPage::getAssociatedFiles(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "AF");
}
PDFObject PDFPage::getOutputIntents(const PDFObjectStorage* storage) const
{
return getObjectFromPageDictionary(storage, "OutputIntents");
}
QRectF PDFPage::getRotatedBox(const QRectF& rect, PageRotation rotation)
{
switch (rotation)
@ -204,6 +275,7 @@ void PDFPage::parseImpl(std::vector<PDFPage>& pages,
{
PDFPage page;
page.m_pageObject = dereferenced;
page.m_pageReference = objectReference;
page.m_mediaBox = currentInheritableAttributes.getMediaBox();
page.m_cropBox = currentInheritableAttributes.getCropBox();
@ -221,6 +293,27 @@ void PDFPage::parseImpl(std::vector<PDFPage>& pages,
page.m_artBox = loader.readRectangle(dictionary->get("ArtBox"), page.getCropBox());
page.m_contents = document->getObject(dictionary->get("Contents"));
page.m_annots = loader.readReferenceArrayFromDictionary(dictionary, "Annots");
page.m_lastModified = PDFEncoding::convertToDateTime(loader.readStringFromDictionary(dictionary, "LastModified"));
page.m_thumbnailReference = loader.readReferenceFromDictionary(dictionary, "Thumb");
page.m_beads = loader.readReferenceArrayFromDictionary(dictionary, "B");
page.m_duration = loader.readIntegerFromDictionary(dictionary, "Dur", 0);
page.m_structParent = loader.readIntegerFromDictionary(dictionary, "StructParents", 0);
page.m_webCaptureContentSetId = loader.readStringFromDictionary(dictionary, "ID");
page.m_preferredZoom = loader.readNumberFromDictionary(dictionary, "PZ", 0.0);
constexpr const std::array<std::pair<const char*, PageTabOrder>, 5> tabStops =
{
std::pair<const char*, PageTabOrder>{ "R", PageTabOrder::Row },
std::pair<const char*, PageTabOrder>{ "C", PageTabOrder::Column },
std::pair<const char*, PageTabOrder>{ "S", PageTabOrder::Structure },
std::pair<const char*, PageTabOrder>{ "A", PageTabOrder::Array },
std::pair<const char*, PageTabOrder>{ "W", PageTabOrder::Widget }
};
page.m_pageTabOrder = loader.readEnumByName(dictionary->get("Tabs"), tabStops.cbegin(), tabStops.cend(), PageTabOrder::Invalid);
page.m_templateName = loader.readNameFromDictionary(dictionary, "TemplateInstantiated");
page.m_userUnit = loader.readNumberFromDictionary(dictionary, "UserUnit", 1.0);
page.m_documentPart = loader.readReferenceFromDictionary(dictionary, "DPart");
pages.emplace_back(std::move(page));
}