private void ProcessState(int st, string nodeText, bool inString, ref FilterEditorState state, ref int startNodeName, ref int startAtt, int i)
{
switch (state)
{
case FilterEditorState.BeforeNodeName:
if (!char.IsWhiteSpace(nodeText, i))
{
startNodeName = i;
state = FilterEditorState.InNodeName;
}
break;
case FilterEditorState.InNodeName:
if (char.IsWhiteSpace(nodeText, i))
{
txtFilter.Select(startNodeName + st, i - startNodeName + 1);
txtFilter.SelectionColor = HcNode;
state = FilterEditorState.AfterNodeName;
}
break;
case FilterEditorState.AfterNodeName:
if (!char.IsWhiteSpace(nodeText, i))
{
startAtt = i;
state = FilterEditorState.InAttribute;
}
break;
case FilterEditorState.InAttribute:
if (char.IsWhiteSpace(nodeText, i) || nodeText[i] == '=')
{
txtFilter.Select(startAtt + st, i - startAtt + 1);
txtFilter.SelectionColor = HcAttribute;
state = FilterEditorState.InString;
}
break;
case FilterEditorState.InString:
if (nodeText[i] == '"' && !inString)
{
state = FilterEditorState.AfterNodeName;
}
break;
}
}
private void HighlightRrt()
{
var selStart = txtFilter.SelectionStart;
var selLength = txtFilter.SelectionLength;
int k = 0;
string str = txtFilter.Text;
int st = 0;
int en = 0;
int lasten = -1;
while (k < str.Length)
{
st = str.IndexOf('<', k);
if (st < 0)
{
break;
}
if (lasten > 0)
{
txtFilter.Select(lasten + 1, st - lasten - 1);
txtFilter.SelectionColor = HcInnerText;
}
en = str.IndexOf('>', st + 1);
if (en < 0)
{
break;
}
k = en + 1;
lasten = en;
if (str[st + 1] == '!')
{
txtFilter.Select(st + 1, en - st - 1);
txtFilter.SelectionColor = HcComment;
continue;
}
string nodeText = str.Substring(st + 1, en - st - 1);
bool inString = false;
int lastSt = -1;
FilterEditorState state = FilterEditorState.BeforeNodeName;
int startNodeName = 0, startAtt = 0;
ProcessEachNodeText(st, nodeText, ref inString, ref lastSt, ref state, ref startNodeName, ref startAtt);
if (state == FilterEditorState.InNodeName)
{
txtFilter.Select(st + 1, nodeText.Length);
txtFilter.SelectionColor = HcNode;
}
}
// reset selection
txtFilter.Select(selStart, selLength);
}
private void ProcessEachNodeText(int st, string nodeText, ref bool inString, ref int lastSt, ref FilterEditorState state, ref int startNodeName, ref int startAtt)
{
for (int i = 0; i < nodeText.Length; ++i)
{
if (nodeText[i] == '"')
{
inString = !inString;
}
if (inString && nodeText[i] == '"')
{
lastSt = i;
}
else if (nodeText[i] == '"')
{
txtFilter.Select(lastSt + st + 2, i - lastSt - 1);
txtFilter.SelectionColor = HcString;
}
ProcessState(st, nodeText, inString, ref state, ref startNodeName, ref startAtt, i);
}
}
