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87ee8ad071
Prepare for treating indirect references differently depending on whether we are parsing a PDF file (in which case reference to objects not in the xref table are null even if they are in the object cache) or whether parse from user code (in which case an indirect reference can refer to a user created object).
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
#include <qpdf/QPDFOutlineDocumentHelper.hh>
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#include <qpdf/QTC.hh>
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QPDFOutlineDocumentHelper::QPDFOutlineDocumentHelper(QPDF& qpdf) :
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QPDFDocumentHelper(qpdf),
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m(new Members())
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{
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QPDFObjectHandle root = qpdf.getRoot();
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if (!root.hasKey("/Outlines")) {
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return;
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}
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QPDFObjectHandle outlines = root.getKey("/Outlines");
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if (!(outlines.isDictionary() && outlines.hasKey("/First"))) {
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return;
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}
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QPDFObjectHandle cur = outlines.getKey("/First");
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QPDFObjGen::set seen;
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while (!cur.isNull() && seen.add(cur)) {
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m->outlines.push_back(QPDFOutlineObjectHelper::Accessor::create(cur, *this, 1));
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cur = cur.getKey("/Next");
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}
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}
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bool
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QPDFOutlineDocumentHelper::hasOutlines()
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{
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return !m->outlines.empty();
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}
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std::vector<QPDFOutlineObjectHelper>
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QPDFOutlineDocumentHelper::getTopLevelOutlines()
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{
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return m->outlines;
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}
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void
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QPDFOutlineDocumentHelper::initializeByPage()
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{
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std::list<QPDFOutlineObjectHelper> queue;
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queue.insert(queue.end(), m->outlines.begin(), m->outlines.end());
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while (!queue.empty()) {
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QPDFOutlineObjectHelper oh = queue.front();
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queue.pop_front();
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m->by_page[oh.getDestPage().getObjGen()].push_back(oh);
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std::vector<QPDFOutlineObjectHelper> kids = oh.getKids();
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queue.insert(queue.end(), kids.begin(), kids.end());
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}
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}
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std::vector<QPDFOutlineObjectHelper>
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QPDFOutlineDocumentHelper::getOutlinesForPage(QPDFObjGen const& og)
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{
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if (m->by_page.empty()) {
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initializeByPage();
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}
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std::vector<QPDFOutlineObjectHelper> result;
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if (m->by_page.count(og)) {
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result = m->by_page[og];
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}
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return result;
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}
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QPDFObjectHandle
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QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name)
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{
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QPDFObjectHandle result;
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if (name.isName()) {
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if (!m->dest_dict.isInitialized()) {
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m->dest_dict = qpdf.getRoot().getKey("/Dests");
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}
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QTC::TC("qpdf", "QPDFOutlineDocumentHelper name named dest");
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result = m->dest_dict.getKeyIfDict(name.getName());
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} else if (name.isString()) {
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if (!m->names_dest) {
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auto dests = qpdf.getRoot().getKey("/Names").getKeyIfDict("/Dests");
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if (dests.isDictionary()) {
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m->names_dest = std::make_shared<QPDFNameTreeObjectHelper>(dests, qpdf);
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}
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}
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if (m->names_dest) {
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if (m->names_dest->findObject(name.getUTF8Value(), result)) {
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QTC::TC("qpdf", "QPDFOutlineDocumentHelper string named dest");
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}
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}
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}
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if (!result.isInitialized()) {
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return QPDFObjectHandle::newNull();
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}
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if (result.isDictionary()) {
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QTC::TC("qpdf", "QPDFOutlineDocumentHelper named dest dictionary");
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return result.getKey("/D");
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}
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return result;
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}
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