static XObject UpdateReferences([NotNull] XObject xObject, MappingSequence footnoteSequence)
{
switch (xObject)
{
case XAttribute a when a.Name == W + "id" && a.Parent?.Name == W + "footnoteReference":
return(new XAttribute(a.Name, footnoteSequence.GetValue(a.Value)));
case XAttribute a:
return(new XAttribute(a.Name, a.Value));
case XElement e:
return
(new XElement(
e.Name,
e.Attributes().Select(x => UpdateReferences(x, footnoteSequence)),
e.Nodes().Select(x => UpdateReferences(x, footnoteSequence))));
case XText t:
return(new XText(t.Value));
default:
return(xObject);
}
}
public static Footnotes Concat([NotNull] Footnotes first, [NotNull] Footnotes second)
{
if (first is null)
{
throw new ArgumentNullException(nameof(first));
}
if (second is null)
{
throw new ArgumentNullException(nameof(second));
}
Sequence idSequence = new Sequence("rId{0}");
MappingSequence footnoteSequence = new MappingSequence();
Package result = first._package.ToPackage(FileAccess.ReadWrite);
if (result.PartExists(PartUri))
{
result.DeletePart(PartUri);
}
PackagePart part = result.CreatePart(PartUri, ContentType);
Dictionary <string, PackageRelationship> resources = new Dictionary <string, PackageRelationship>();
Dictionary <string, PackageRelationship> otherResources = new Dictionary <string, PackageRelationship>();
// For existing hyperlinks: recreate the relationship.
foreach (HyperlinkInfo info in first.Hyperlinks)
{
resources[info.Id] =
part.CreateRelationship(info.Target, info.TargetMode, HyperlinkInfo.RelationshipType, idSequence.NextValue());
}
// For new hyperlinks: create the relationship.
foreach (HyperlinkInfo info in second.Hyperlinks)
{
otherResources[info.Id] =
part.CreateRelationship(info.Target, info.TargetMode, HyperlinkInfo.RelationshipType, idSequence.NextValue());
}
XElement content =
new XElement(
first.Content.Name,
Combine(first.Content.Attributes(), second.Content.Attributes()),
first.Content.Nodes()
.Select(x => UpdateResources(x, resources))
.Select(x => UpdateFootnotes(x, footnoteSequence)),
second.Content
.Nodes()
.Select(x => UpdateResources(x, otherResources))
.Select(x => UpdateFootnotes(x, footnoteSequence)));
content.WriteTo(part);
PackagePart documentPart = result.GetPart(Document.PartUri);
XElement document;
using (Stream stream = documentPart.GetStream())
{
document = XElement.Load(stream);
}
XElement updatedDocument =
new XElement(
document.Name,
document.Attributes(),
document.Nodes().Select(x => UpdateReferences(x, footnoteSequence)));
updatedDocument.WriteTo(documentPart);
return(new Footnotes(result));
}