/// <summary>
/// Constructor.
/// </summary>
/// <param name="parent">To be assigned to <see cref="Parent"/> property.</param>
/// <param name="name">To be assigned to <see cref="Name"/> property.</param>
/// <param name="value">To be assigned to <see cref="Value"/> property.</param>
internal SingleValueNode([NotNull] ConfigurationNode parent, [NotNull] string name, [NotNull] string value)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException($"{nameof(name)} is null or empty.");
}
Parent = parent;
IndentLevel = parent is ConfigurationFile ? (ushort)0 : (ushort)(parent.IndentLevel + 1);
Name = name;
Value = value;
}
/// <summary>
/// Constructor used in cloning.
/// </summary>
/// <param name="parent">To be assigned to <see cref="Parent"/> property.</param>
/// <param name="name">To be assigned to <see cref="Name"/> property.</param>
/// <param name="children">Enumeration of child nodes. Nodes from this enumeration won't be added
/// to the <see cref="Children"/> list of the newly created instance, but their clones.</param>
/// <param name="isArray">Indicates if this instance represents an array.</param>
protected ConfigurationNode(ConfigurationNode parent, [NotNull] string name, IEnumerable <IConfigNode> children,
bool isArray)
{
Parent = parent;
IndentLevel = parent == null || parent is ConfigurationFile
? (ushort)0
: (ushort)(parent.IndentLevel + 1);
Name = name;
IsArray = isArray;
_children = children.Select(c => c.Clone(this)).ToList();
Children = _children.AsReadOnly();
}
/// <summary>
/// Returns a full path to configuration settings represented by the calling <paramref name="node"/>.
/// </summary>
/// <param name="node">Configuration setting whose path we want to get.</param>
/// <returns>The path of the configuration setting represented by <paramref name="node"/>. It is in format:
/// <c>[file.name].setting.path</c>. For example: <c>[views.view.comment].display.default.display_plugin</c>.
/// Note that full path also supports arrays. One example with an array is:
/// <c>[views.view.comment].dependencies.module[0]</c>.</returns>
internal static string GetPathName([NotNull] this IConfigNode node)
{
if (node is ConfigurationFile)
{
return($"[{node.Name}]");
}
ConfigurationNode parent = node.Parent;
string pathName = node.Name;
if (string.Equals(pathName, "-", StringComparison.Ordinal))
{
pathName =
$"[{parent?.Children?.Index().FirstOrDefault(n => ReferenceEquals(n.Value, node)).Key.ToString("##########") ?? string.Empty}]";
}
return(parent == null ? pathName : $"{parent.GetPathName()}.{pathName}");
}
private static IEnumerable <IConfigNode> LoadChildren(ConfigurationNode parent, ushort indentSpaces,
ConfigFileReader reader, Predicate <IConfigNode> validNode)
{
if (reader.EoF)
{
yield break;
}
ushort requiredIndent = (ushort)reader.CurrentLineIndentSpaces;
if (requiredIndent < indentSpaces)
{
yield break;
}
if (requiredIndent == indentSpaces && !(parent is ConfigurationFile))
{
yield break;
}
while (!reader.EoF)
{
if (reader.CurrentLineIndentSpaces != requiredIndent)
{
yield break;
}
string content = reader.CurrentLineContent;
reader.NextLine();
IConfigNode node = LoadNode(parent, requiredIndent, content, reader);
if (validNode?.Invoke(node) ?? true)
{
yield return(node);
}
}
}
private static IConfigNode LoadNode([NotNull] ConfigurationNode parent, ushort indentSpaces, string content,
[NotNull] ConfigFileReader reader)
{
Match match = RxEmptyArrayNode.Match(content);
if (match.Success)
{
return(new ConfigurationNode(parent, match.Groups["name"].Value, indentSpaces, reader,
isEmptyArray: true));
}
match = RxSingleValueNode.Match(content);
if (match.Success)
{
return(new SingleValueNode(parent, match.Groups["name"].Value, match.Groups["value"].Value));
}
match = RxNameNode.Match(content);
if (match.Success)
{
return(new ConfigurationNode(parent, match.Groups["name"].Value, indentSpaces, reader));
}
if (string.Equals(content, "-", StringComparison.Ordinal))
{
return(new ConfigurationNode(parent, "-", indentSpaces, reader));
}
if (content.StartsWith("- ", StringComparison.Ordinal) && content.Length > 2)
{
return(new SingleValueNode(parent, "-", content.Substring(1).Trim()));
}
throw new Exception($"Line content cannot be parsed: {content}");
}
/// <inheritdoc />
public virtual IConfigNode Clone(ConfigurationNode parent)
{
this.VerifyParent(parent);
return(new ConfigurationNode(parent, Name, Children, IsArray));
}
/// <inheritdoc cref="ConfigurationNode.Clone" select="summary" />
/// <param name="parent">Has to be <c>null</c>.</param>
/// <returns>Cloned instance.</returns>
/// <exception cref="ArgumentException">If <paramref name="parent"/> isn't <c>null</c>.</exception>
public override IConfigNode Clone(ConfigurationNode parent) => parent == null
? Clone()
: throw new ArgumentNullException($"{nameof(parent)} has to be null.", nameof(parent));
