private void InitializeExtensions() // 初始化扩展信息。
{
NavigationNodeList.Clear();
PendingAppendedNodes.Clear();
// 获取该扩展点的所有扩展信息。
var extensions = _context.GetExtensions(NavigationExtensionPoint);
// 将扩展XML信息转换成扩展模型。
extensions.ForEach(extension => AddNavigationByExtension(extension));
HandlePendingAppendedNodes();
}
private void HandlePendingAppendedNodes()
{
if (PendingAppendedNodes.Count == 0)
{
return;
}
var nodesStack = new List <NavigationNode>();
NavigationNodeList.ForEach(navNode => nodesStack.Add(navNode));
PendingAppendedNodes.ToList().ForEach(navNode => nodesStack.Add(navNode));
List <NavigationNode> currentStack;
NavigationNode current;
foreach (var node in PendingAppendedNodes.ToArray())
{
currentStack = new List <NavigationNode>(nodesStack.ToArray());
while (currentStack.Count > 0)
{
current = currentStack[0];
currentStack.RemoveAt(0);
if (node.ParentId.Equals(current.Id))
{
current.Children.Add(node);
node.Parent = current;
PendingAppendedNodes.Remove(node);
NavigationNodeList.Remove(node);
continue;
}
foreach (var child in current.Children)
{
currentStack.Add(child);
}
}
}
foreach (var node in PendingAppendedNodes)
{
using (var locker = NavigationNodeList.Lock())
{
if (locker.Contains(node))
{
continue;
}
}
NavigationNodeList.Add(node);
}
}
/// <summary>
/// 将Xml节点转换成导航节点对象。
/// </summary>
/// <param name="nav">所属Navigation。</param>
/// <param name="node">Xml节点。</param>
/// <param name="Parent">父导航节点。</param>
/// <param name="children">子导航节点列表。</param>
private void ConvertToNode(NavigationNode parent, XmlNode node, IBundle bundle)
{
// 获取Id、Name、Value、Order、Permisson、Icon和Tooltip属性。
string id = GetAttribute(node, "Id");
string name = GetAttribute(node, "Name");
if (string.IsNullOrEmpty(name))
{
FileLogUtility.Warn("The Name attribute can not be empty for UIShell.NavigationService extension.");
return;
}
string value = GetAttribute(node, "Value");
string order = GetAttribute(node, "Order");
float orderFloat = 0;
float.TryParse(order, out orderFloat);
string permission = GetAttribute(node, "Permission");
string icon = GetAttribute(node, "Icon");
string toolTip = GetAttribute(node, "Tooltip");
string parentId = GetAttribute(node, "ParentId");
// 创建导航节点。
var navNode = new NavigationNode {
ParentId = string.IsNullOrEmpty(parentId) ? Guid.NewGuid().ToString() : parentId,
Id = string.IsNullOrEmpty(id) ? Guid.NewGuid().ToString() : id,
Name = name,
Order = orderFloat,
Value = value,
Permission = permission,
Icon = icon,
ToolTip = toolTip,
Bundle = bundle
};
// 设置父节点，并添加到子节点列表。
if (!string.IsNullOrEmpty(parentId))
{
PendingAppendedNodes.Add(navNode);
}
else if (string.IsNullOrEmpty(parentId))
{
if (parent != null)
{
navNode.Parent = parent;
parent.Children.Add(navNode);
}
else
{
navNode.Parent = null;
navNode.ParentId = Guid.NewGuid().ToString();
NavigationNodeList.Add(navNode);
}
}
// 将XML节点其它的属性保存到Attributes字典。
foreach (XmlAttribute attr in node.Attributes)
{
if (attr.Name.Equals("Id") || attr.Name.Equals("Name") || attr.Name.Equals("Value") || attr.Name.Equals("Order") || attr.Name.Equals("Permission") || attr.Name.Equals("Icon") || attr.Name.Equals("ToolTip"))
{
continue;
}
navNode.Attributes[attr.Name] = attr.Value;
}
// 遍历Xml子节点，并递归转换成导航节点。
foreach (XmlNode childnode in node.ChildNodes)
{
if (childnode is XmlComment)
{
continue;
}
ConvertToNode(navNode, childnode, bundle);
}
}
