From fc925827b2703cbefdc10373680fe49499c2ed8b Mon Sep 17 00:00:00 2001
From: dhufnagel <dominik.hufnagel@yoshteq.de>
Date: Fri, 12 Feb 2021 11:22:54 +0100
Subject: [PATCH] fix initial state of checkboxes in display layer (#12904)

consider the export value when multiple checkboxes have the same name
---
 src/display/annotation_layer.js |  5 ++++-
 test/pdfs/issue12716.pdf.link   |  1 +
 test/test_manifest.json         | 10 ++++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 test/pdfs/issue12716.pdf.link

diff --git a/src/display/annotation_layer.js b/src/display/annotation_layer.js
index afef1db5c..3879984b6 100644
--- a/src/display/annotation_layer.js
+++ b/src/display/annotation_layer.js
@@ -874,7 +874,10 @@ class CheckboxWidgetAnnotationElement extends WidgetAnnotationElement {
     const data = this.data;
     const id = data.id;
     const value = storage.getOrCreateValue(id, {
-      value: data.fieldValue && data.fieldValue !== "Off",
+      value:
+        data.fieldValue &&
+        ((data.exportValue && data.exportValue === data.fieldValue) ||
+          (!data.exportValue && data.fieldValue !== "Off")),
     }).value;
 
     this.container.className = "buttonWidgetAnnotation checkBox";
diff --git a/test/pdfs/issue12716.pdf.link b/test/pdfs/issue12716.pdf.link
new file mode 100644
index 000000000..4e73bca65
--- /dev/null
+++ b/test/pdfs/issue12716.pdf.link
@@ -0,0 +1 @@
+https://github.com/mozilla/pdf.js/files/5670936/form-cms1500.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 4d9a8d51d..5a893ad2e 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -5038,5 +5038,15 @@
       "rounds": 1,
       "type": "eq",
       "forms": true
+    },
+    {
+      "id": "issue12716",
+      "file": "pdfs/issue12716.pdf",
+      "md5": "9bdc9c552bcfccd629f5f97385e79ca5",
+      "rounds": 1,
+      "link": true,
+      "type": "eq",
+      "forms": true,
+      "lastPage": 1
     }
 ]