Add document and object helpers for outlines (bookmarks)

1 files changed, 117 insertions, 0 deletions

diff --git a/libqpdf/QPDFOutlineObjectHelper.cc b/libqpdf/QPDFOutlineObjectHelper.cc
new file mode 100644
index 00000000..e8eb11d0
--- /dev/null
+++ b/libqpdf/QPDFOutlineObjectHelper.cc
@@ -0,0 +1,117 @@
+#include <qpdf/QPDFOutlineObjectHelper.hh>
+#include <qpdf/QPDFOutlineDocumentHelper.hh>
+#include <qpdf/QTC.hh>
+
+QPDFOutlineObjectHelper::Members::~Members()
+{
+}
+
+QPDFOutlineObjectHelper::Members::Members(QPDFOutlineDocumentHelper& dh) :
+    dh(dh)
+{
+}
+
+QPDFOutlineObjectHelper::QPDFOutlineObjectHelper(
+    QPDFObjectHandle oh, QPDFOutlineDocumentHelper& dh, int depth) :
+    QPDFObjectHelper(oh),
+    m(new Members(dh))
+{
+    if (depth > 50)
+    {
+        // Not exercised in test suite, but was tested manually by
+        // temporarily changing max depth to 1.
+        return;
+    }
+    if (QPDFOutlineDocumentHelper::Accessor::checkSeen(
+            this->m->dh, this->oh.getObjGen()))
+    {
+        QTC::TC("qpdf", "QPDFOutlineObjectHelper loop");
+        return;
+    }
+
+    QPDFObjectHandle cur = oh.getKey("/First");
+    while (! cur.isNull())
+    {
+        QPDFOutlineObjectHelper new_ooh(cur, dh, 1 + depth);
+        new_ooh.m->parent = new QPDFOutlineObjectHelper(*this);
+        this->m->kids.push_back(new_ooh);
+        cur = cur.getKey("/Next");
+    }
+}
+
+PointerHolder<QPDFOutlineObjectHelper>
+QPDFOutlineObjectHelper::getParent()
+{
+    return this->m->parent;
+}
+
+std::list<QPDFOutlineObjectHelper>
+QPDFOutlineObjectHelper::getKids()
+{
+    return this->m->kids;
+}
+
+QPDFObjectHandle
+QPDFOutlineObjectHelper::getDest()
+{
+    QPDFObjectHandle dest;
+    QPDFObjectHandle A;
+    if (this->oh.hasKey("/Dest"))
+    {
+        QTC::TC("qpdf", "QPDFOutlineObjectHelper direct dest");
+        dest = this->oh.getKey("/Dest");
+    }
+    else if ((A = this->oh.getKey("/A")).isDictionary() &&
+             A.getKey("/S").isName() &&
+             (A.getKey("/S").getName() == "/GoTo") &&
+             A.hasKey("/D"))
+    {
+        QTC::TC("qpdf", "QPDFOutlineObjectHelper action dest");
+        dest = A.getKey("/D");
+    }
+    if (! dest.isInitialized())
+    {
+        dest = QPDFObjectHandle::newNull();
+    }
+
+    if (dest.isName() || dest.isString())
+    {
+        QTC::TC("qpdf", "QPDFOutlineObjectHelper named dest");
+        dest = this->m->dh.resolveNamedDest(dest);
+    }
+
+    return dest;
+}
+
+QPDFObjectHandle
+QPDFOutlineObjectHelper::getDestPage()
+{
+    QPDFObjectHandle dest = getDest();
+    if ((dest.isArray()) && (dest.getArrayNItems() > 0))
+    {
+        return dest.getArrayItem(0);
+    }
+    return QPDFObjectHandle::newNull();
+}
+
+int
+QPDFOutlineObjectHelper::getCount()
+{
+    int count = 0;
+    if (this->oh.hasKey("/Count"))
+    {
+        count = this->oh.getKey("/Count").getIntValue();
+    }
+    return count;
+}
+
+std::string
+QPDFOutlineObjectHelper::getTitle()
+{
+    std::string result;
+    if (this->oh.hasKey("/Title"))
+    {
+        result = this->oh.getKey("/Title").getUTF8Value();
+    }
+    return result;
+}