internal static void InsertChar(char c, ref char deletedChar, TextSource ts)
{
var tb = ts.CurrentTB;
switch (c)
{
case '\n':
if (!ts.CurrentTB.AllowInsertRemoveLines)
{
throw new ArgumentOutOfRangeException("Cant insert this char in ColumnRange mode");
}
if (ts.Count == 0)
{
InsertLine(ts);
}
InsertLine(ts);
break;
case '\r': break;
case '\b'://backspace
if (tb.Selection.Start.iChar == 0 && tb.Selection.Start.iLine == 0)
{
return;
}
if (tb.Selection.Start.iChar == 0)
{
if (!ts.CurrentTB.AllowInsertRemoveLines)
{
throw new ArgumentOutOfRangeException("Cant insert this char in ColumnRange mode");
}
if (tb.LineInfos[tb.Selection.Start.iLine - 1].VisibleState != VisibleState.Visible)
{
tb.ExpandBlock(tb.Selection.Start.iLine - 1);
}
deletedChar = '\n';
MergeLines(tb.Selection.Start.iLine - 1, ts);
}
else
{
deletedChar = ts[tb.Selection.Start.iLine][tb.Selection.Start.iChar - 1].c;
ts[tb.Selection.Start.iLine].RemoveAt(tb.Selection.Start.iChar - 1);
tb.Selection.Start = new Place(tb.Selection.Start.iChar - 1, tb.Selection.Start.iLine);
}
break;
case '\t':
int spaceCountNextTabStop = tb.TabLength - (tb.Selection.Start.iChar % tb.TabLength);
if (spaceCountNextTabStop == 0)
{
spaceCountNextTabStop = tb.TabLength;
}
for (int i = 0; i < spaceCountNextTabStop; i++)
{
ts[tb.Selection.Start.iLine].Insert(tb.Selection.Start.iChar, new Char(' '));
}
tb.Selection.Start = new Place(tb.Selection.Start.iChar + spaceCountNextTabStop, tb.Selection.Start.iLine);
break;
default:
ts[tb.Selection.Start.iLine].Insert(tb.Selection.Start.iChar, new Char(c));
tb.Selection.Start = new Place(tb.Selection.Start.iChar + 1, tb.Selection.Start.iLine);
break;
}
}
public SelectCommand(TextSource ts) : base(ts)
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="tb">Underlaying textbox</param>
/// <param name="insertedText">Text for inserting</param>
public InsertTextCommand(TextSource ts, string insertedText) : base(ts)
{
this.InsertedText = insertedText;
}
/// <summary>
/// Construstor
/// </summary>
/// <param name="tb">Underlaying textbox</param>
public ClearSelectedCommand(TextSource ts) : base(ts)
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="tb">Underlaying textbox</param>
/// <param name="c">Inserting char</param>
public InsertCharCommand(TextSource ts, char c) : base(ts)
{
this.c = c;
}