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Create outline for a document

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This commit is contained in:
Jakub Melka
2020-11-15 18:15:10 +01:00
parent e06148fa8c
commit cb3a36f891
8 changed files with 334 additions and 1 deletions
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143
PdfForQtLib/sources/pdfdocumentbuilder.cpp
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@ -1059,6 +1059,115 @@ QRectF PDFDocumentBuilder::getPolygonsBoundingRect(const Polygons& polygons) con
return rect;
}
PDFObjectReference PDFDocumentBuilder::createOutlineItem(const PDFOutlineItem* root, bool writeOutlineData)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
if (writeOutlineData)
{
// Title
objectBuilder.beginDictionaryItem("Title");
objectBuilder << root->getTitle();
objectBuilder.endDictionaryItem();
// Destination
const PDFActionGoTo* action = dynamic_cast<const PDFActionGoTo*>(root->getAction());
if (action)
{
objectBuilder.beginDictionaryItem("Dest");
objectBuilder << action->getDestination();
objectBuilder.endDictionaryItem();
}
// Color
if (root->getTextColor().isValid() && root->getTextColor() != Qt::black)
{
objectBuilder.beginDictionaryItem("C");
objectBuilder << root->getTextColor();
objectBuilder.endDictionaryItem();
}
// Flags
PDFInteger flags = 0;
if (root->isFontItalics())
{
flags += 1;
}
if (root->isFontBold())
{
flags += 2;
}
if (flags > 0)
{
objectBuilder.beginDictionaryItem("F");
objectBuilder << flags;
objectBuilder.endDictionaryItem();
}
}
// Create descendands
std::vector<PDFObjectReference> children;
children.reserve(root->getChildCount());
for (size_t i = 0; i < root->getChildCount(); ++i)
{
children.push_back(createOutlineItem(root->getChild(i), true));
}
if (!children.empty())
{
// First/Last pointers
objectBuilder.beginDictionaryItem("First");
objectBuilder << children.front();
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("Last");
objectBuilder << children.back();
objectBuilder.endDictionaryItem();
}
size_t totalCount = root->getTotalCount();
if (totalCount > 0)
{
objectBuilder.beginDictionaryItem("Count");
objectBuilder << PDFInteger(totalCount);
objectBuilder.endDictionaryItem();
}
objectBuilder.endDictionary();
PDFObjectReference parentReference = addObject(objectBuilder.takeObject());
for (size_t i = 0; i < children.size(); ++i)
{
PDFObjectFactory fixPointersObjectBuilder;
fixPointersObjectBuilder.beginDictionary();
fixPointersObjectBuilder.beginDictionaryItem("Parent");
fixPointersObjectBuilder << parentReference;
fixPointersObjectBuilder.endDictionaryItem();
if (i > 0)
{
fixPointersObjectBuilder.beginDictionaryItem("Prev");
fixPointersObjectBuilder << children[i - 1];
fixPointersObjectBuilder.endDictionaryItem();
}
if (i + 1 < children.size())
{
fixPointersObjectBuilder.beginDictionaryItem("Next");
fixPointersObjectBuilder << children[i + 1];
fixPointersObjectBuilder.endDictionaryItem();
}
fixPointersObjectBuilder.endDictionary();
mergeTo(children[i], fixPointersObjectBuilder.takeObject());
}
return parentReference;
}
void PDFDocumentBuilder::flattenPageTree()
{
PDFObjectReference pageTreeRoot = getPageTreeRoot();
@ -1166,6 +1275,11 @@ std::vector<PDFObjectReference> PDFDocumentBuilder::getPages() const
return result;
}
void PDFDocumentBuilder::setOutline(const PDFOutlineItem* root)
{
setOutline(createOutlineItem(root, false));
}
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
@ -4180,6 +4294,20 @@ void PDFDocumentBuilder::setLanguage(QLocale locale)
}
void PDFDocumentBuilder::setOutline(PDFObjectReference outline)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Outlines");
objectBuilder << outline;
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedCatalog = objectBuilder.takeObject();
mergeTo(getCatalogReference(), updatedCatalog);
}
void PDFDocumentBuilder::setPageArtBox(PDFObjectReference page,
QRectF box)
{
@ -4270,6 +4398,21 @@ void PDFDocumentBuilder::setPageTrimBox(PDFObjectReference page,
}
void PDFDocumentBuilder::setPageUserUnit(PDFObjectReference page,
PDFReal unit)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("UserUnit");
objectBuilder << unit;
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedPageObject = objectBuilder.takeObject();
mergeTo(page, updatedPageObject);
}
void PDFDocumentBuilder::updateTrailerDictionary(PDFInteger objectCount)
{
PDFObjectFactory objectBuilder;