From 1ea39f99ede16180bcac6dce66622894eae02fb8 Mon Sep 17 00:00:00 2001
From: EvgeniyIgol <evgeny.igol@onlyoffice.com>
Date: Mon, 27 Jan 2025 09:29:46 +0300
Subject: [PATCH] Fix bug 72174 - fix processing instruction in custom xml

---
 word/Editor/custom-xml/custom-xml.js | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/word/Editor/custom-xml/custom-xml.js b/word/Editor/custom-xml/custom-xml.js
index adadbeea6a..2bd517edaa 100644
--- a/word/Editor/custom-xml/custom-xml.js
+++ b/word/Editor/custom-xml/custom-xml.js
@@ -89,9 +89,21 @@
 	};
 	CustomXml.prototype.addContentByXMLString = function (strCustomXml)
 	{
+		let nXmlHeaderStart	= strCustomXml.indexOf('<?', 0);
+		let nXmlHeaderEnd	= strCustomXml.indexOf('?>', nXmlHeaderStart);
+		let strXmlHeader 	= null;
+		if (nXmlHeaderStart !== -1 && nXmlHeaderEnd !== -1)
+		{
+			strXmlHeader = strCustomXml.substring(nXmlHeaderStart, nXmlHeaderEnd + "?>".length);
+			strCustomXml = strCustomXml.substring(nXmlHeaderEnd + '?>'.length, strCustomXml.length);
+		}
+
 		let oStax			= new StaxParser(strCustomXml),
 			rootContent		= new CustomXmlContent(null);
 
+		if (strXmlHeader !== null)
+			rootContent.xmlQuestionHeader = strXmlHeader;
+
 		while (oStax.Read())
 		{
 			switch (oStax.GetEventType()) {
@@ -130,6 +142,7 @@
 		this.content		= [];
 		this.attribute		= {};
 		this.textContent	= "";
+		this.xmlQuestionHeader = null;
 
 		this.addAttribute = function (name, value)
 		{
@@ -178,7 +191,9 @@
 
 				if (!content.name)
 				{
-					writer.WriteXmlString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
+					if (content.xmlQuestionHeader !== null)
+						writer.WriteXmlString(content.xmlQuestionHeader + "\n");
+
 					current = content.content[0];
 				}
 				else