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Separate tool for extracting pages

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This commit is contained in:
Jakub Melka
2020-10-31 14:23:13 +01:00
parent 4051591929
commit c58158e3ee
12 changed files with 591 additions and 21 deletions
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169
PdfForQtLib/sources/pdfdocumentbuilder.cpp
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@ -862,6 +862,113 @@ QRectF PDFDocumentBuilder::getPolygonsBoundingRect(const Polygons& polygons) con
return rect;
}
void PDFDocumentBuilder::flattenPageTree()
{
PDFObjectReference pageTreeRoot = getPageTreeRoot();
PDFObject pageTree = PDFObject::createReference(pageTreeRoot);
std::vector<PDFPage> pages = PDFPage::parse(&m_storage, pageTree);
std::vector<PDFObjectReference> pageReferences;
// First, fill inheritable attributes to pages and correct parent
for (const PDFPage& page : pages)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Parent");
objectBuilder << pageTreeRoot;
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("MediaBox");
objectBuilder << page.getMediaBox();
objectBuilder.endDictionaryItem();
if (page.getCropBox().isValid())
{
objectBuilder.beginDictionaryItem("CropBox");
objectBuilder << page.getCropBox();
objectBuilder.endDictionaryItem();
}
if (!page.getResources().isNull())
{
objectBuilder.beginDictionaryItem("Resources");
objectBuilder << page.getResources();
objectBuilder.endDictionaryItem();
}
if (page.getPageRotation() != PageRotation::None)
{
PDFInteger angle = 0;
switch (page.getPageRotation())
{
case PageRotation::Rotate90:
angle = 90;
break;
case PageRotation::Rotate180:
angle = 180;
break;
case PageRotation::Rotate270:
angle = 270;
break;
default:
break;
}
objectBuilder.beginDictionaryItem("Rotate");
objectBuilder << angle;
objectBuilder.endDictionaryItem();
}
objectBuilder.endDictionary();
mergeTo(page.getPageReference(), objectBuilder.takeObject());
pageReferences.push_back(page.getPageReference());
}
setPages(pageReferences);
}
void PDFDocumentBuilder::setPages(const std::vector<PDFObjectReference>& pageReferences)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Kids");
objectBuilder.beginArray();
for (const PDFObjectReference& pageReference : pageReferences)
{
objectBuilder << pageReference;
}
objectBuilder.endArray();
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("Count");
objectBuilder << PDFInteger(pageReferences.size());
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
mergeTo(getPageTreeRoot(), objectBuilder.takeObject());
}
std::vector<PDFObjectReference> PDFDocumentBuilder::getPages() const
{
std::vector<PDFObjectReference> result;
if (const PDFDictionary* pageTreeRoot = m_storage.getDictionaryFromObject(m_storage.getObject(getPageTreeRoot())))
{
PDFDocumentDataLoaderDecorator loader(&m_storage);
result = loader.readReferenceArrayFromDictionary(pageTreeRoot, "Kids");
}
return result;
}
std::vector<PDFObject> PDFDocumentBuilder::copyFrom(const std::vector<PDFObject>& objects, const PDFObjectStorage& storage, bool createReferences)
{
// 1) Collect all references, which we must copy. If object is referenced, then
@ -2756,6 +2863,20 @@ PDFObject PDFDocumentBuilder::createTrailerDictionary(PDFObjectReference catalog
}
void PDFDocumentBuilder::removeOutline()
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Outlines");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedCatalog = objectBuilder.takeObject();
mergeTo(getCatalogReference(), updatedCatalog);
}
void PDFDocumentBuilder::setAnnotationAppearanceState(PDFObjectReference annotation,
QByteArray appearanceState)
{
@ -3124,6 +3245,54 @@ void PDFDocumentBuilder::updateTrailerDictionary(PDFInteger objectCount)
}
void PDFDocumentBuilder::removeThreads()
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Threads");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedCatalog = objectBuilder.takeObject();
mergeTo(getCatalogReference(), updatedCatalog);
}
void PDFDocumentBuilder::removeDocumentActions()
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("OpenAction");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("AA");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedCatalog = objectBuilder.takeObject();
mergeTo(getCatalogReference(), updatedCatalog);
}
void PDFDocumentBuilder::removeStructureTree()
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("StructTreeRoot");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("MarkInfo");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedCatalog = objectBuilder.takeObject();
mergeTo(getCatalogReference(), updatedCatalog);
}
/* END GENERATED CODE */
} // namespace pdf