From e164b62189a882610f151ca112386c6bb41c1147 Mon Sep 17 00:00:00 2001
From: Alexander Dyuzhev <dyuzhev@gmail.com>
Date: Mon, 13 Dec 2021 21:13:03 +0300
Subject: [PATCH] Arabic Text Marker replace by Zero Width Space,
 metanorma/isodoc#354

---
 src/main/java/org/apache/fop/fonts/MultiByteFont.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/org/apache/fop/fonts/MultiByteFont.java b/src/main/java/org/apache/fop/fonts/MultiByteFont.java
index 43b51606..90b5b2fa 100644
--- a/src/main/java/org/apache/fop/fonts/MultiByteFont.java
+++ b/src/main/java/org/apache/fop/fonts/MultiByteFont.java
@@ -674,6 +674,13 @@ private GlyphSequence mapCharsToGlyphs(CharSequence cs, List associations) {
             }
             notifyMapOperation();
             gi = findGlyphIndex(cc);
+            
+            if (gi == SingleByteEncoding.NOT_FOUND_CODE_POINT && cc == 0x061C) { // ARABIC LETTER MARK
+                //replace to ZERO-WIDTH SPACE
+                cc = 0x200B;
+                gi = findGlyphIndex(cc);
+            }
+            
             if (gi == SingleByteEncoding.NOT_FOUND_CODE_POINT) {
                 warnMissingGlyph((char) cc);
                 gi = giMissing;