/// <summary>
/// Determines if this snippet belongs to <paramref name="task"/> or one of its subtasks.
/// Returns true if <paramref name="task"/> or <see cref="TaskNumber"/> are <c>null</c>.
/// </summary>
public bool IsInTask(HierarchicalNumber?task)
{
if (task == null || TaskNumber == null)
{
return(true);
}
HierarchicalNumber refTask = task.Value;
HierarchicalNumber myTask = TaskNumber.Value;
if (myTask.Major != refTask.Major)
{
return(false);
}
if (myTask.Minor == null || refTask.Minor == null)
{
return(true);
}
if (myTask.Minor != refTask.Minor)
{
return(false);
}
if (myTask.SubMinor == null || refTask.SubMinor == null)
{
return(true);
}
if (myTask.SubMinor != refTask.SubMinor)
{
return(false);
}
return(true);
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var strValue = value as string;
if (strValue == null || strValue == "")
{
return(null);
}
try
{
return(HierarchicalNumber.ParseFromString((string)value));
}
catch (Exception x)
{
return(new ValidationResult(false, x.Message));
}
}
/// <summary>
/// Determines if this snippet belongs to <paramref name="task"/> or one of its subtasks or any task before <paramref name="task"/>.
/// Returns true if <paramref name="task"/> or <see cref="TaskNumber"/> are <c>null</c>.
/// </summary>
public bool IsInOrBeforeTask(HierarchicalNumber?task)
{
if (task == null || TaskNumber == null)
{
return(true);
}
HierarchicalNumber refTask = task.Value;
HierarchicalNumber myTask = TaskNumber.Value;
//go through the number level by level
if (myTask.Major > refTask.Major)
{
return(false);
}
if (myTask.Minor == null || refTask.Minor == null)
{
return(true);
}
if (myTask.Minor > refTask.Minor)
{
return(false);
}
if (myTask.SubMinor == null || refTask.SubMinor == null)
{
return(true);
}
if (myTask.SubMinor > refTask.SubMinor)
{
return(false);
}
return(true);
}
/// <summary>
/// Interprets the abstract syntax of the TML document and generates semantic node representatives.
/// </summary>
/// <exception cref="FormatException">Thrown if an unexpected tag or a task number in an invalid format is encountered and if more than one subsnippet is active.</exception>
private void ParseTML()
{
nodes.Clear();
//process all nodes of the abstract syntax tree
foreach (var node in syntaxTree.Nodes)
{
var contentNode = node as TMLTerminalNode;
var tagNode = node as TMLTagNode;
//if the node is just content, add a new text node
if (contentNode != null)
{
nodes.Add(new TextNode(contentNode));
}
//if the node is a tag node, try to interpret it as a snippet
else if (tagNode != null)
{
if (tagNode.TagName != "snippet")
{
throw new FormatException($"Did not expect tag {tagNode.TagName} here.");
}
//Create the semantic snippet node
var snippetNode = new SnippetNode();
//Try to find the indentation of this snippet (everything that is a whitespace in front of the snippet tag)
var startIndentIncl = tagNode.OpeningTagBeginIndex;
Func <char, bool> isIndentation = (char c) => Char.IsWhiteSpace(c) && c != '\r' && c != '\n';
while (startIndentIncl > 0 && isIndentation(text[startIndentIncl - 1]))
{
--startIndentIncl;
}
snippetNode.Indentation = text.Substring(startIndentIncl, tagNode.OpeningTagBeginIndex - startIndentIncl);
//Try to parse the task number
string taskNumber;
if (tagNode.Attributes.TryGetValue("task", out taskNumber))
{
try
{
snippetNode.TaskNumber = HierarchicalNumber.ParseFromString(taskNumber);
}
catch (Exception x)
{
throw new FormatException($"Error parsing hierarchical number from {taskNumber}.", x);
}
}
//Assign the existing subsnippets
foreach (var subsnippet in subsnippets)
{
subsnippet.Key.SetValue(snippetNode, FindSubSnippet(tagNode, subsnippet.Value.TagName));
}
//Check if there are invalid subtags
if (tagNode.InnerNodes.Where(n => n is TMLTagNode).Select(n => (TMLTagNode)n).Any(n => !subsnippetTags.Contains(n.TagName)))
{
throw new FormatException("The snippet tag contains invalid subtags.");
}
if (!snippetNode.HasAtMostOneActiveSubSnippet)
{
throw new FormatException("More than one subsnippet have uncommented lines.");
}
nodes.Add(snippetNode);
}
}
}
