/// <summary>
/// Forces an update of the current context
/// </summary>
public void UpdateContext()
{
curContext = DotContext.NodeID;
curLine = dotEditor.CaretLine();
if (curLine == null)
{
return;
}
inQuotes = false;
escaped = false;
inDict = false;
foreach (char c in curLine.Take(dotEditor.TextArea.Caret.Column - 1))
{
PushNewChar(c);
}
}
private void PushNewChar(char inChar)
{
if (inChar == '"' && !escaped)
{
inQuotes = !inQuotes;
}
else if (inChar == '\\' || escaped)
{
escaped = !escaped;
}
if (!inQuotes) //the context cannot change if we are in quotes
{
DotContext newContext = curContext;
if (!inDict && inChar == '[')
{
inDict = true;
}
if (curContext == DotContext.MultiLineComment)
{
if (inChar == '*' && prevChar == '/')
{
newContext = DotContext.NodeID;
}
}
else if (curContext == DotContext.Comment)
{
if (inChar == '\n')
{
newContext = DotContext.NodeID;
}
}
else if (inChar == '/' && prevChar == '*')
{
newContext = DotContext.MultiLineComment;
}
else if (inChar == '#' || (inChar == '/' && prevChar == '/'))
{
newContext = DotContext.Comment;
}
else if (inDict)
{
if (inChar == ']')
{
newContext = DotContext.NodeID;
inDict = false;
}
else if ("[,; \t\n".Contains(inChar))
{
switch (curContext)
{
case DotContext.EdgeAttribute:
case DotContext.NodeAttribute:
case DotContext.GraphAttribute:
case DotContext.ClusterAttribute:
break;
case DotContext.EdgeValue: newContext = DotContext.EdgeAttribute;
break;
case DotContext.NodeValue: newContext = DotContext.NodeAttribute;
break;
case DotContext.GraphValue: newContext = DotContext.GraphAttribute;
break;
case DotContext.ClusterValue: newContext = DotContext.ClusterAttribute;
break;
default:
string startLine = curLine.GetDotBase().Trim();
if (string.IsNullOrWhiteSpace(startLine))
{
newContext = DotContext.NodeID;
}
else if (startLine == "edge")
{
newContext = DotContext.EdgeAttribute;
}
else if (startLine == "node")
{
newContext = DotContext.NodeAttribute;
}
else if (startLine == "graph")
{
newContext = DotContext.GraphAttribute;
}
else if (startLine.Contains("--") || startLine.Contains("->"))
{
newContext = DotContext.EdgeAttribute;
}
else
{
newContext = DotContext.NodeAttribute;
}
break;
}
}
else if (inChar == '=')
{
switch (curContext)
{
case DotContext.EdgeAttribute: newContext = DotContext.EdgeValue;
break;
case DotContext.NodeAttribute: newContext = DotContext.NodeValue;
break;
case DotContext.GraphAttribute: newContext = DotContext.GraphValue;
break;
case DotContext.ClusterAttribute: newContext = DotContext.ClusterValue;
break;
default:
break;
}
}
}
else //Not in dict
{
if (prevChar == '-' && (inChar == '-' || inChar == '>'))
{
newContext = DotContext.NodeID;
}
}
Console.WriteLine("q:{0}\te:{1}\tc:{2}\td:{3}\tnc:{4}", inQuotes, escaped, inChar, inDict, newContext);
curContext = newContext;
}
prevChar = inChar;
curLine = curLine.Insert(dotEditor.TextArea.Caret.Column - 1, inChar.ToString());
}