private static XmlElement KeepOrThrow(QueryParser parser, int errorCode, string message, int start, int end)
{
//
// Error object.
//
ParseError error = new ParseError(errorCode, message, start, end);
//
// Check run mode.
//
if (parser._errors != null)
{
//
// Create error message and add it to the errors collection of the query object.
//
int id = parser._errors.Add(error);
//
// Generate an error reference tag that will be inserted in the generated CAML on the faulting position.
//
return(parser._factory.ParseError(id));
}
else
{
//
// Runtime mode: throw an exception.
//
NotSupportedException ex = new NotSupportedException(error.ToString());
ex.HelpLink = error.HelpLink;
throw ex;
}
}
/// <summary>
/// Helper method to clear selections in the LINQ and CAML textboxes.
/// </summary>
private void ClearSelections()
{
//
// Select all and undo marking.
//
txtLinq.Select(0, txtLinq.Text.Length);
txtLinq.SelectionFont = new Font(txtLinq.Font, FontStyle.Regular);
txtCaml.Select(0, txtCaml.Text.Length);
txtCaml.SelectionFont = new Font(txtCaml.Font, FontStyle.Regular);
//
// Unselect for pretty display.
//
txtLinq.Select(0, 0);
txtCaml.Select(0, 0);
//
// Hide tooltip.
//
linqTip.RemoveAll();
camlTip.RemoveAll();
//
// Set default cursor.
//
txtLinq.Cursor = Cursors.Default;
txtCaml.Cursor = Cursors.Default;
//
// Set to no current error.
//
currentError = null;
}
/// <summary>
/// Helper method to mark an error in the UI.
/// </summary>
/// <param name="id">ID of the error to mark. Used for marking in the CAML textbox.</param>
/// <param name="error">Error object of the error to mark. Used for marking in the LINQ expression textbox.</param>
/// <param name="selected">Indicates whether the error is currently selected or not.</param>
private void MarkError(int id, ParseError error, bool selected)
{
//
// Select the expression part indicated by the error and mark it.
//
txtLinq.Select(error.StartIndex, error.EndIndex - error.StartIndex + 1);
txtLinq.SelectionColor = Color.Red;
if (selected)
{
txtLinq.SelectionFont = new Font(txtLinq.SelectionFont, FontStyle.Underline);
}
//
// Locate the ParseError placeholder in the CAML query and mark it.
//
string tag = "<ParseError ID=\"" + id + "\" />";
int iCaml = txtCaml.Text.IndexOf(tag, StringComparison.Ordinal);
if (iCaml >= 0)
{
txtCaml.Select(iCaml, tag.Length);
txtCaml.SelectionColor = Color.Red;
if (selected)
{
txtCaml.SelectionFont = new Font(txtCaml.SelectionFont, FontStyle.Underline);
}
else
{
_camlPositions.Add(id, new Position()
{
Start = iCaml, End = iCaml + tag.Length - 1
});
}
}
}
private void txtCaml_MouseMove(object sender, MouseEventArgs e)
{
//
// Get the position inside the textbox based on the mouse cursor position.
//
int i = txtCaml.GetCharIndexFromPosition(e.Location);
//
// Find the error (if any) that corresponds to the current position.
// We expect the number of errors to be low, so we just iterate over the collection.
//
foreach (var pos in _camlPositions)
{
ParseError error = _errors[pos.Key];
//
// Matching position?
//
if (pos.Value.Start <= i && i <= pos.Value.End)
{
//
// Compare to selected error (if any).
//
if (currentError == null || currentError != error)
{
//
// Clear previous error display.
//
ClearSelections();
//
// Mark error.
//
MarkError(pos.Key, error, true);
//
// Unselect for pretty display.
//
txtLinq.Select(0, 0);
txtCaml.Select(0, 0);
//
// Set cursor on CAML textbox to indicate the possibility to click it (act as a link).
//
txtCaml.Cursor = Cursors.Hand;
//
// Set the current error.
//
currentError = error;
}
//
// Set the tooltip.
//
camlTip.SetToolTip(txtCaml, error.ToString());
//
// Found and done.
//
return;
}
}
//
// No error found. Clean the error display if a previous selected error is still displayed.
//
if (currentError != null)
{
ClearSelections();
}
}
