//
// The EditLoop: One loop for each key pressed!
//
private string EditLoop(IQueryCompiledError queryCompiledError)
{
while (true)
{
//
// Fill m_UndoRedoStates
//
m_UndoRedoStates.Append(m_CurrentState);
//
// Re-write the query each time a key is pressed
//
m_ConsoleWriter.Rewrite(m_CurrentState);
// Eventually show errors
if (queryCompiledError != null)
{
// Show errors once...
m_ConsoleWriter.ShowQueryCompiledErrors(m_CurrentState, queryCompiledError);
// ... and then set queryCompiledError to null to avoid showing them anymore
queryCompiledError = null;
}
//
// ReadKey!
//
var consoleKeyInfo = Console.ReadKey();
//
// Handle special console key
//
switch (consoleKeyInfo.Key)
{
case ConsoleKey.F5: // F5 --> Run the query!;
Console.CursorVisible = false;
m_ConsoleWriter.Rewrite(m_CurrentState); // <-- need to rewrite the query, else the char where the cursor was is hidden!
m_ConsoleWriter.SetCursorPosition(0, m_CurrentState.Lines.Count);
Console.CursorLeft = 0;
Console.CursorVisible = true;
m_AlreadyEditedQueries.AppendButDontClearNext(m_CurrentState.QueryString);
return(m_CurrentState.QueryString);
case ConsoleKey.Escape:
return(null);
case ConsoleKey.PageUp:
m_ConsoleWriter.ClearQueryEdit(m_CurrentState);
m_CurrentState = new State(m_AlreadyEditedQueries.GetPrevious(), 0, 0, Location.Null);
m_UndoRedoStates.Clear(m_CurrentState);
continue;
case ConsoleKey.PageDown:
m_ConsoleWriter.ClearQueryEdit(m_CurrentState);
m_CurrentState = new State(m_AlreadyEditedQueries.GetNext(), 0, 0, Location.Null);
m_UndoRedoStates.Clear(m_CurrentState);
continue;
}
//
// Handle the key inputed with the appropriate keyHandler
//
foreach (var keyHandler in m_KeyHandlers)
{
if (!keyHandler.IsHandlerFor(consoleKeyInfo))
{
continue;
}
m_CurrentState = keyHandler.Handle(consoleKeyInfo, m_CurrentState);
break;
}
continue;
}
}
//-----------------------------------------------------------------
//
// Show query compilation error
//
//-----------------------------------------------------------------
internal void ShowQueryCompiledErrors(State state, IQueryCompiledError queryCompiledError)
{
Debug.Assert(state != null);
Debug.Assert(queryCompiledError != null);
//
// Write errors descriptions
//
Console.ForegroundColor = ConsoleColor.Red;
Console.BackgroundColor = ConsoleColor.Black;
var lines = state.Lines;
Console.CursorTop = m_QueryEditionTop + lines.Count;
Console.CursorLeft = 0;
var nbErrors = queryCompiledError.Errors.Count;
Console.WriteLine(nbErrors + " compilation error" + (nbErrors > 1 ? "s" : ""));
foreach (var error in queryCompiledError.Errors)
{
Console.WriteLine(" " + error.Description);
}
var actualY = Console.CursorTop - m_QueryEditionTop;
m_MaxNbLines = actualY > m_MaxNbLines ? actualY : m_MaxNbLines;
//
// Highlight errors on query edited!
//
Console.BackgroundColor = ConsoleColor.Red;
Console.ForegroundColor = ConsoleColor.White;
var queryString = state.QueryString;
var consoleWidth = Console.WindowWidth;
foreach (var error in queryCompiledError.Errors)
{
var startPos = error.SubStringStartPos;
var length = error.SubStringLength;
Debug.Assert(startPos + length <= queryString.Length);
var location = new Location(lines, startPos);
length = length > AvailableWidth ? AvailableWidth : length;
var errorString = queryString.Substring(startPos, length);
// An error can spawn several lines!
errorString = errorString.Replace(LINE_FEED, "\n");
var errorLines = errorString.Split(new [] { '\n' });
var x = PROMPTER.Length + location.X;
for (var y = 0; y < errorLines.Length; y++)
{
Console.CursorTop = m_QueryEditionTop + location.Y + y;
var errorLine = errorLines[y];
if (x + errorLine.Length < consoleWidth)
{
Console.CursorLeft = x;
Console.Write(errorLine);
}
x = PROMPTER.Length;
}
Console.CursorTop = m_QueryEditionTop;
Console.CursorLeft = PROMPTER.Length;
}
Console.BackgroundColor = BACK_COLOR;
Console.ForegroundColor = FORE_COLOR;
SetCursorPosition(state.CursorX, state.CursorY);
}
internal string ShowCompilatioErrorsAndThenGetQueryString(IQueryCompiledError queryCompiledError)
{
Debug.Assert(queryCompiledError != null);
Debug.Assert(m_CurrentState != null);
return(EditLoop(queryCompiledError));
}
