Force first revision xref to not have subsections

DEVSIX-1428

Autoported commit.
Original commit hash: [31e6078b7]

Author: Benoit Lagae

itext/itext.kernel/itext/kernel/font/PdfSimpleFont.cs

@@ -112,12 +112,7 @@ public override int AppendGlyphs(String text, int from, int to, IList<Glyph> gly
                         processed++;
                     }
                     else {
-                        if (glyph == null && TextUtil.IsWhitespaceOrNonPrintable((int)text[i])) {
-                            processed++;
-                        }
-                        else {
-                            break;
-                        }
+                        break;
                     }
                 }
             }

itext/itext.kernel/itext/kernel/pdf/PdfDocument.cs

@@ -710,13 +710,17 @@ public virtual void Close() {
                         FlushFonts();
                         writer.FlushWaitingObjects();
                         // flush unused objects
-                        if (IsFlushUnusedObjects()) {
-                            for (int i = 0; i < xref.Size(); i++) {
-                                PdfIndirectReference indirectReference = xref.Get(i);
-                                if (!indirectReference.IsFree() && !indirectReference.CheckState(PdfObject.FLUSHED)) {
+                        for (int i = 0; i < xref.Size(); i++) {
+                            PdfIndirectReference indirectReference = xref.Get(i);
+                            if (indirectReference != null && !indirectReference.IsFree() && !indirectReference.CheckState(PdfObject.FLUSHED
+                                )) {
+                                if (IsFlushUnusedObjects()) {
                                     PdfObject @object = indirectReference.GetRefersTo();
                                     @object.Flush();
                                 }
+                                else {
+                                    indirectReference.SetFree();
+                                }
                             }
                         }
                     }

itext/itext.kernel/itext/kernel/pdf/PdfXrefTable.cs

@@ -139,7 +139,6 @@ protected internal virtual void FreeReference(PdfIndirectReference reference) {
                 if (reference.GetGenNumber() < MAX_GENERATION) {
                     freeReferences.Add(reference.GetObjNumber());
                     EnsureCount(Math.Max(this.count, reference.GetObjNumber()));
-                    xref[reference.GetObjNumber()] = null;
                 }
             }
         }
@@ -155,16 +154,9 @@ protected internal virtual void SetCapacity(int capacity) {
         protected internal virtual void WriteXrefTableAndTrailer(PdfDocument document, PdfObject fileId, PdfObject
              crypto) {
             PdfWriter writer = document.GetWriter();
-            if (document.IsAppendMode()) {
-                // Increment generation number for all freed references.
-                foreach (int? objNr in freeReferences) {
-                    xref[(int)objNr].genNr++;
-                }
-            }
-            else {
-                foreach (int? objNr in freeReferences) {
-                    xref[(int)objNr] = null;
-                }
+            // Increment generation number for all freed references.
+            foreach (int? objNr in freeReferences) {
+                xref[(int)objNr].genNr++;
             }
             freeReferences.Clear();
             for (int i = count; i > 0; --i) {
@@ -187,8 +179,7 @@ protected internal virtual void WriteXrefTableAndTrailer(PdfDocument document, P
             for (int i = 1; i < Size(); i++) {
                 PdfIndirectReference reference = xref[i];
                 if (reference != null) {
-                    if ((document.properties.appendMode && !reference.CheckState(PdfObject.MODIFIED)) || (reference.IsFree() &&
-                         reference.GetGenNumber() == 0) || (!reference.CheckState(PdfObject.FLUSHED))) {
+                    if (document.properties.appendMode && !reference.CheckState(PdfObject.MODIFIED)) {
                         reference = null;
                     }
                 }

port-hash

@@ -1 +1 @@
-e9e3d2866e8024938a0d4adcb78a2d65c7a4c255
+31e6078b70a83542f4cbf63b465170f6198aebc4