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XFA: form pagination

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Jakub Melka
2021-12-12 20:10:48 +01:00
parent 38bc1f40fc
commit ecd04a8668
7 changed files with 109 additions and 2 deletions
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69
Pdf4QtLib/sources/pdfform.cpp
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@ -1668,6 +1668,75 @@ void PDFFormManager::drawXFAForm(const QMatrix& pagePointToDevicePointMatrix,
}
}
void PDFFormManager::performPaging()
{
if (!hasXFAForm() || !m_document)
{
return;
}
std::vector<QSizeF> pageSizes = m_xfaEngine.getPageSizes();
const PDFCatalog* catalog = m_document->getCatalog();
const size_t pageCount = catalog->getPageCount();
std::vector<QSizeF> oldPageSizes;
oldPageSizes.reserve(pageCount);
for (size_t i = 0; i < pageCount; ++i)
{
oldPageSizes.push_back(catalog->getPage(i)->getMediaBox().size());
}
bool changed = pageSizes.size() != oldPageSizes.size();
if (!changed)
{
for (size_t i = 0; i < pageCount; ++i)
{
changed = changed ||
!qFuzzyCompare(pageSizes[i].width(), oldPageSizes[i].width()) ||
!qFuzzyCompare(pageSizes[i].height(), oldPageSizes[i].height());
}
}
if (changed && !oldPageSizes.empty())
{
PDFDocumentModifier modifier(m_document);
modifier.getBuilder()->setFormManager(this);
modifier.markReset();
PDFDocumentBuilder* builder = modifier.getBuilder();
builder->flattenPageTree();
std::vector<PDFObjectReference> pages = builder->getPages();
// Do we have more pages?
if (pages.size() > pageSizes.size())
{
pages.resize(pageSizes.size());
}
// Do we have less pages?
while (pages.size() < pageSizes.size())
{
std::vector<pdf::PDFObjectReference> references = pdf::PDFDocumentBuilder::createReferencesFromObjects(builder->copyFrom(pdf::PDFDocumentBuilder::createObjectsFromReferences({ pages.front() }), *builder->getStorage(), true));
Q_ASSERT(references.size() == 1);
pages.push_back(references.front());
}
Q_ASSERT(pages.size() == pageSizes.size());
for (size_t i = 0; i < pages.size(); ++i)
{
builder->setPageMediaBox(pages[i], QRectF(QPointF(0, 0), pageSizes[i]));
}
builder->setPages(std::move(pages));
if (modifier.finalize())
{
emit documentModified(PDFModifiedDocument(modifier.getDocument(), nullptr, modifier.getFlags()));
}
}
}
void PDFFormManager::clearEditors()
{
qDeleteAll(m_widgetEditors);