/// <summary>
/// 根据当前的变量名称情况，更新和完善 NextVariableID 属性。
/// </summary>
/// <returns>NextVariableID 是否发生变化？</returns>
public bool PurifyNextVariableID()
{
int oldNextVariableID = this.NextVariableID;
int maxVariableID = 0, varID;
foreach (ViNamedObject obj in this.Children)
{
ViGlobalVariable variable = obj as ViGlobalVariable;
if (variable == null)
{
continue;
}
if (variable.Name.StartsWith(VariablePrefix, StringComparison.OrdinalIgnoreCase))
{
if (int.TryParse(variable.Name.Substring(VariablePrefix.Length), out varID))
{
if (maxVariableID < varID)
{
maxVariableID = varID;
}
}
}
}
//
this.NextVariableID = maxVariableID + 1;
return(oldNextVariableID != this.NextVariableID);
}
/// <summary>
/// 删除指定的全局变量。
/// </summary>
public virtual bool RemoveGlobalVariable(ViGlobalVariable var)
{
if (var == null)
{
return(false);
}
return(this.Children.Remove(var));
}
/// <summary>
/// 保存变量信息。
/// </summary>
/// <param name="writer">文本对象</param>
protected virtual void SaveVariables(TextWriter writer)
{
foreach (ViNamedObject obj in this.Children)
{
ViGlobalVariable connType = obj as ViGlobalVariable;
if (connType != null)
{
writer.WriteLine(ViTextFile.Indent + connType.ToString(true));
}
}
}
/// <summary>
/// 将文本行描述的变量定义，解析为变量对象。
/// </summary>
/// <param name="decl">变量的文本行描述</param>
/// <param name="typeCreation">自动创建变量数据类型的方式</param>
/// <returns>变量对象，null 表示解析失败</returns>
public static new ViGlobalVariable Parse(string decl, ViTypeCreation typeCreation)
{
ViGlobalVariable variable = Parse(decl, typeCreation, (name, dataType) => new ViGlobalVariable(name, dataType)) as ViGlobalVariable;
if (variable == null)
{
return(null);
}
StringConfig config = new StringConfig(variable.Comment);
variable.Comment = config["_C"];
variable.UUID = config["UUID"];
//
return(variable);
}
/// <summary>
/// 读取一行变量描述信息。
/// </summary>
/// <param name="line">变量文本行描述信息</param>
/// <returns>成功/失败？</returns>
protected virtual bool OnVariableLine(string line)
{
if (line.StartsWith(ViTextFile.CommentBegin))
{
return(true);
}
ViGlobalVariable connType = ViGlobalVariable.Parse(line, ViTypeCreation.Create);
if (connType == null || connType.Type == null)
{
return(false);
}
this.AddChild(connType);
return(true);
}
public ViGlobalVariable GetGlobalVariable(string uuid)
{
if (string.IsNullOrEmpty(uuid))
{
return(null);
}
if (!ViGlobalVariable.CheckUUID(uuid))
{
return(null);
}
if (this.Children.Count > 0)
{
return(this.Children.Where((o) => ((ViGlobalVariable)o).UUID == uuid).FirstOrDefault() as ViGlobalVariable);
}
return(null);
}
/// <summary>
/// 删除指定的全局变量。
/// </summary>
public override bool RemoveGlobalVariable(ViGlobalVariable var)
{
return(this.DeleteChild(var));
}