internal static void ClearSelected(TextSource ts)
{
var tb = ts.CurrentTB;
Place start = tb.Selection.Start;
Place end = tb.Selection.End;
int fromLine = Math.Min(end.iLine, start.iLine);
int toLine = Math.Max(end.iLine, start.iLine);
int fromChar = tb.Selection.FromX;
int toChar = tb.Selection.ToX;
if (fromLine < 0)
{
return;
}
//
if (fromLine == toLine)
{
ts[fromLine].RemoveRange(fromChar, toChar - fromChar);
}
else
{
ts[fromLine].RemoveRange(fromChar, ts[fromLine].Count - fromChar);
ts[toLine].RemoveRange(0, toChar);
ts.RemoveLine(fromLine + 1, toLine - fromLine - 1);
InsertCharCommand.MergeLines(fromLine, ts);
}
//
tb.Selection.Start = new Place(fromChar, fromLine);
//
ts.NeedRecalc(new TextSource.TextChangedEventArgs(fromLine, toLine));
}
/// <summary>
/// Merge lines i and i+1
/// </summary>
internal static void MergeLines(int i, TextSource ts)
{
var tb = ts.CurrentTB;
if (i + 1 >= ts.Count)
{
return;
}
tb.ExpandBlock(i);
tb.ExpandBlock(i + 1);
int pos = ts[i].Count;
//
if (ts[i].Count == 0)
{
ts.RemoveLine(i);
}
else if (ts[i + 1].Count == 0)
{
ts.RemoveLine(i + 1);
}
else
{
ts[i].AddRange(ts[i + 1]);
ts.RemoveLine(i + 1);
}
tb.Selection.Start = new Place(pos, i);
ts.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
}
internal static void InsertLine(TextSource ts)
{
var tb = ts.CurrentTB;
if (!tb.Multiline && tb.LinesCount > 0)
{
return;
}
if (ts.Count == 0)
{
ts.InsertLine(0, ts.CreateLine());
}
else
{
BreakLines(tb.Selection.Start.iLine, tb.Selection.Start.iChar, ts);
}
tb.Selection.Start = new Place(0, tb.Selection.Start.iLine + 1);
ts.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
}
internal static void InsertText(string insertedText, TextSource ts)
{
var tb = ts.CurrentTB;
try {
tb.Selection.BeginUpdate();
char cc = '\x0';
if (ts.Count == 0)
{
InsertCharCommand.InsertLine(ts);
}
tb.ExpandBlock(tb.Selection.Start.iLine);
foreach (char c in insertedText)
{
InsertCharCommand.InsertChar(c, ref cc, ts);
}
ts.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
} finally {
tb.Selection.EndUpdate();
}
}
