Fix QPDFOutlineDocumentHelper::resolveNamedDest (fixes #1238)

Handle case where named destination is a dictionary with /D entry.

Test case is hand-edited outlines-with-old-root-dests.pdf with modified
object 107.

ChangeLog

@@ -1,3 +1,9 @@
+2024-07-14  M Holger  <m.holger@qpdf.org>
+
+	* Bug fix: handle named destinations where the entry is a
+	dictionary with /D entry instead of an explicit destination.
+	Fixes #1238.
+
 2024-07-04  M Holger  <m.holger@qpdf.org>
 
 	* Treat corrupt JPEG streams as unfilterable. This avoids them

libqpdf/QPDFOutlineDocumentHelper.cc

@@ -88,5 +88,9 @@ QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name)
     if (!result.isInitialized()) {
         return QPDFObjectHandle::newNull();
     }
+    if (result.isDictionary()) {
+        QTC::TC("qpdf", "QPDFOutlineDocumentHelper named dest dictionary");
+        return result.getKey("/D");
+    }
     return result;
 }

qpdf/qpdf.testcov

@@ -356,6 +356,7 @@ QPDFOutlineObjectHelper action dest 0
 QPDFOutlineObjectHelper named dest 0
 QPDFOutlineDocumentHelper name named dest 0
 QPDFOutlineDocumentHelper string named dest 0
+QPDFOutlineDocumentHelper named dest dictionary 0
 QPDFOutlineObjectHelper loop 0
 QPDFObjectHandle merge top type mismatch 0
 QPDFObjectHandle merge shallow copy 0

qpdf/qtest/outlines.test

@@ -18,6 +18,7 @@ my @outline_files = (
     'page-labels-and-outlines',
     'outlines-with-actions',
     'outlines-with-old-root-dests',
+    'outlines-with-old-root-dests-dict',
     'outlines-with-loop',
     );
 my $n_tests = scalar(@outline_files);

qpdf/qtest/qpdf/outlines-with-old-root-dests-dict.out

@@ -0,0 +1,12 @@
+page 0: •Merschqaberschq (A) 1.2.2 -> 0: /XYZ null null null -> [ 6 0 R /XYZ null null null ]
+page 1: •Gabeebeebee (name) 1.2.1 -> 1: /FitR 66 714 180 770 -> [ 7 0 R /FitR 66 714 180 770 ]
+page 5: •Potato 1 -> 5: /XYZ null null null -> [ 11 0 R /XYZ null null null ]
+page 11: •Mern 1.1 -> 11: /Fit -> [ 17 0 R /Fit ]
+page 12: •Biherbadem 1.1.1 -> 12: /FitV 100 -> [ 18 0 R /FitV 100 ]
+page 12: •Gawehwehweh 1.1.2 -> 12: /XYZ null null null -> [ 18 0 R /XYZ null null null ]
+page 13: •Squash ÷πʬ÷ 1.2 -> 13: /FitH 792 -> [ 19 0 R /FitH 792 ]
+page 15: •Salad 2 -> 15: /XYZ 66 756 3 -> [ 21 0 R /XYZ 66 756 3 ]
+page 18: •Glarpenspliel (A, name) 1.1.1.1 -> 18: /XYZ null null null -> [ 24 0 R /XYZ null null null ]
+page 19: •Hagoogamagoogle 1.1.1.2 -> 19: /XYZ null null null -> [ 25 0 R /XYZ null null null ]
+page 22: •Jawarnianbvarwash 1.1.2.1 -> 22: /XYZ null null null -> [ 28 0 R /XYZ null null null ]
+test 49 done