From 52f9d326a56e6409a1487c724241f91de33e3ba6 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Mon, 28 Jan 2019 20:13:10 -0500
Subject: Resolve duplicated page objects (fixes #268)

When linearizing a file or getting the list of all pages in a file,
detect if the pages tree contains a duplicated page object and, if so,
shallow copy it. This makes it possible to have a one to one mapping
of page positions to page objects.
---
 libqpdf/QPDF_optimization.cc | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libqpdf/QPDF_optimization.cc')

diff --git a/libqpdf/QPDF_optimization.cc b/libqpdf/QPDF_optimization.cc
index f282e5f3..ecece7db 100644
--- a/libqpdf/QPDF_optimization.cc
+++ b/libqpdf/QPDF_optimization.cc
@@ -156,6 +156,9 @@ QPDF::pushInheritedAttributesToPage(bool allow_changes, bool warn_skipped_keys)
         return;
     }
 
+    // Calling getAllPages() resolves any duplicated page objects.
+    getAllPages();
+
     // key_ancestors is a mapping of page attribute keys to a stack of
     // Pages nodes that contain values for them.
     std::map<std::string, std::vector<QPDFObjectHandle> > key_ancestors;
-- 
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