/// <summary>
/// Loads the specified settings file into this settings document by creating the settings node tree based on the file's
/// tab structure. Any line that contains only whitespace or only a comment will not become a <see cref="SettingsNode"/>
/// but will be retained when the file is saved.
/// </summary>
/// <param name="stream">The stream.</param>
/// <exception cref="FileNotFoundException">The file specified in <c>filename</c> was not found.</exception>
private void LoadFromStream(StreamReader stream)
{
List <string> lineComments = new List <string>();
Nodes.Clear();
SettingsNode prevNode = this;
string line;
while ((line = stream.ReadLine()) != null)
{
//Check the line for a valid node name
if (String.IsNullOrWhiteSpace(line) || line.TrimStart().StartsWith(";"))
{
lineComments.Add(line);
continue;
}
// Find the node's level
int level = 0;
while (line.ElementAt(level) == '\t')
{
level++;
}
// Create a new settings node
SettingsNode currentNode = CreateNode(line);
// Attach preceding file comments to the current node
if (lineComments.Count > 0)
{
for (int i = 0; i < lineComments.Count; i++)
{
currentNode.AddPrecedingComment(lineComments[i]);
}
lineComments.Clear();
}
// Add the current node at the proper level
if (level == 0)
{
_nodes.Add(currentNode);
}
else if (level == prevNode.Level)
{
prevNode.Parent.Nodes.Add(currentNode);
}
else if (level > prevNode.Level)
{
prevNode.Nodes.Add(currentNode);
}
else // level < prevNode.Level
{
while (level <= prevNode.Level)
{
prevNode = prevNode.Parent;
}
prevNode.Nodes.Add(currentNode);
}
// Update the previous node
prevNode = currentNode;
}
if (lineComments.Count > 0)
{
_trailingComments = lineComments;
}
}
