From 83216e640c489a22bd4001c9c39affb72b8b1124 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Mon, 22 Feb 2021 18:36:05 -0500
Subject: Preserve form fields when splitting pages (fixes #340)

---
 libqpdf/QPDFAcroFormDocumentHelper.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'libqpdf')

diff --git a/libqpdf/QPDFAcroFormDocumentHelper.cc b/libqpdf/QPDFAcroFormDocumentHelper.cc
index dce413bd..611d469a 100644
--- a/libqpdf/QPDFAcroFormDocumentHelper.cc
+++ b/libqpdf/QPDFAcroFormDocumentHelper.cc
@@ -676,10 +676,16 @@ QPDFAcroFormDocumentHelper::copyFieldsFromForeignPage(
     QPDFPageObjectHelper foreign_page,
     QPDFAcroFormDocumentHelper& foreign_afdh)
 {
+    std::set<QPDFObjGen> added;
     for (auto field: foreign_afdh.getFormFieldsForPage(foreign_page))
     {
         auto new_field = this->qpdf.copyForeignObject(
             field.getObjectHandle());
-        addFormField(new_field);
+        auto og = new_field.getObjGen();
+        if (! added.count(og))
+        {
+            addFormField(new_field);
+            added.insert(og);
+        }
     }
 }
-- 
cgit v1.2.3-70-g09d2