|
public FindNode ( string ns, string name ) : |
||
| ns | string |
/// A |
| name | string |
/// A |
| return | ||
static string GetRights(XmpTag xmp)
{
var rightsNode = xmp.FindNode("http://purl.org/dc/elements/1.1/", "rights");
if (rightsNode == null)
return null;
foreach (var child in rightsNode.Children)
{
if (child.Namespace == "http://www.w3.org/1999/02/22-rdf-syntax-ns#" && child.Name == "li" &&
HasLangQualifier(child, "en"))
{
return child.Value;
}
}
return null;
}
/// <summary>
/// Update the value of the specified node, or create it.
/// Seems SetTextNode should work whether or not is already exists, but in some cases it doesn't.
/// </summary>
/// <param name="tag"></param>
/// <param name="ns"></param>
/// <param name="name"></param>
/// <param name="val"></param>
void AddOrModify(XmpTag tag, string ns, string name, string val)
{
var node = tag.FindNode(ns, name);
if (node != null)
node.Value = val;
else
tag.SetTextNode(ns, name, val);
}
void SetRights(XmpTag xmp, string rights)
{
var rightsNode = xmp.FindNode("http://purl.org/dc/elements/1.1/", "rights");
if (rightsNode == null)
{
if (string.IsNullOrEmpty(rights))
return; // leave it missing.
// No existing rights node, and we have some. We use (default lang) rights for copyright too, and there seems to be no way to
// make the base node without setting that. So set it to something meaningless.
// This will typically never happen, since our dialog requires a non-empty copyright.
// I'm not entirely happy with it, but as far as I can discover the current version of taglib cannot
// set the 'en' alternative of dc:rights without setting the default alternative. In fact, I'm not sure the
// result of doing so would technically be valid xmp; the standard calls for every langauge alternation
// to have a default.
xmp.SetLangAltNode("http://purl.org/dc/elements/1.1/", "rights", "Unknown");
rightsNode = xmp.FindNode("http://purl.org/dc/elements/1.1/", "rights");
}
foreach (var child in rightsNode.Children)
{
if (child.Namespace == "http://www.w3.org/1999/02/22-rdf-syntax-ns#" && child.Name == "li" &&
HasLangQualifier(child, "en"))
{
if (string.IsNullOrEmpty(rights))
{
rightsNode.RemoveChild(child);
// enhance: possibly we should remove rightsNode, if it now has no children, and if taglib can.
// However, we always require a copyright, so this will typically not happen.
}
else
child.Value = rights;
return;
}
}
// Didn't find an existing rights:en node.
if (string.IsNullOrEmpty(rights))
return; // leave it missing.
var childNode = new XmpNode(XmpTag.RDF_NS, "li", rights);
childNode.AddQualifier(new XmpNode(XmpTag.XML_NS, "lang", "en"));
rightsNode.AddChild(childNode);
}
private void TestBagNode(XmpTag tag, string ns, string name, string[] values)
{
var node = tag.FindNode(ns, name);
Assert.IsFalse(node == null);
Assert.AreEqual(XmpNodeType.Bag, node.Type);
Assert.AreEqual(values.Length, node.Children.Count);
int i = 0;
foreach (var childNode in node.Children)
{
Assert.AreEqual(values[i], childNode.Value);
Assert.AreEqual(0, childNode.Children.Count);
i++;
}
}
