From 15269f36d8b7ca17f52b98d9e0f18c6eec102b7b Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Sun, 21 Feb 2021 05:46:12 -0500
Subject: addFormField: update cache rather than invalidating

---
 libqpdf/QPDFAcroFormDocumentHelper.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'libqpdf/QPDFAcroFormDocumentHelper.cc')

diff --git a/libqpdf/QPDFAcroFormDocumentHelper.cc b/libqpdf/QPDFAcroFormDocumentHelper.cc
index 9f800a8e..cf3cb161 100644
--- a/libqpdf/QPDFAcroFormDocumentHelper.cc
+++ b/libqpdf/QPDFAcroFormDocumentHelper.cc
@@ -35,7 +35,6 @@ QPDFAcroFormDocumentHelper::hasAcroForm()
 void
 QPDFAcroFormDocumentHelper::addFormField(QPDFFormFieldObjectHelper ff)
 {
-    invalidateCache();
     auto acroform = this->qpdf.getRoot().getKey("/AcroForm");
     if (! acroform.isDictionary())
     {
@@ -50,6 +49,9 @@ QPDFAcroFormDocumentHelper::addFormField(QPDFFormFieldObjectHelper ff)
         acroform.replaceKey("/Fields", fields);
     }
     fields.appendItem(ff.getObjectHandle());
+    std::set<QPDFObjGen> visited;
+    traverseField(
+        ff.getObjectHandle(), QPDFObjectHandle::newNull(), 0, visited);
 }
 
 std::vector<QPDFFormFieldObjectHelper>
-- 
cgit v1.2.3-54-g00ecf