private void InsertText(TextBufferLocation location, ArrayList textList, bool addToUndo, bool loading)
{
if (!this._undoing)
{
this.RedoStack.Clear();
}
int count = textList.Count;
if (count >= 1)
{
TextLine line = location.Line;
int lineIndex = location.LineIndex;
int columnIndex = location.ColumnIndex;
TextLine next = line;
int lineNum = lineIndex;
int index = columnIndex;
int lineIndexDelta = 0;
bool flag = columnIndex < line.Length;
for (int i = 0; i < count; i++)
{
char[] chars = (char[]) textList[i];
int length = chars.Length;
int num9 = 0;
if (i > 0)
{
next = next.Next;
lineNum++;
}
if (length > 0)
{
next.Insert(index, chars, 0, length);
if (next == this._last.Line)
{
this._last.ColumnIndex = next.Length;
}
num9 = next.Length;
if (num9 > this._maxLineLength)
{
this._maxLineLength = num9;
this._maxLine = next;
}
index += length;
}
if (i < (count - 1))
{
if (flag)
{
this.SplitLine(next, lineNum, index, true);
}
else
{
this.InsertLine(next, lineNum, true);
}
lineIndexDelta++;
index = 0;
}
}
this.FixLocationLineNumbers(lineIndex, lineIndexDelta, next, lineNum, index);
this._lineCount += lineIndexDelta;
this._last.MoveDown(lineIndexDelta);
this._last.ColumnIndex = this._last.Line.Length;
if (addToUndo)
{
this.AddUndo(4, lineIndex, columnIndex, lineNum, index, textList);
}
if (!loading)
{
this.OnTextBufferChanged(new TextBufferEventArgs(lineIndex, columnIndex, lineIndex, columnIndex, lineNum, index));
}
location.SetLine(next, lineNum);
location.ColumnIndex = index;
}
}
private void ProcessUndoUnit(UndoUnit unit, TextBufferLocation location)
{
TextBufferLocation location2 = this.CreateTextBufferLocation();
location2.GotoLine(unit.StartLineNum);
location2.ColumnIndex = unit.StartIndex;
switch (unit.Command)
{
case 1:
this.DeleteChar(location2, false);
break;
case 2:
this.InsertChar(location2, (char) unit.Data, false);
break;
case 3:
this.InsertText(location2, (ArrayList) unit.Data, false);
break;
case 4:
{
TextBufferLocation end = this.CreateTextBufferLocation();
end.GotoLine(unit.EndLineNum);
end.ColumnIndex = unit.EndIndex;
this.DeleteText(new TextBufferSpan(location2, end), false);
end.Dispose();
break;
}
}
if (location != null)
{
location.SetLine(location2.Line, location2.LineIndex);
location.ColumnIndex = location2.ColumnIndex;
}
location2.Dispose();
}
private bool DeleteLine(TextBufferLocation location)
{
TextLine line = location.Line;
if (line == null)
{
return false;
}
TextLine previous = line.Previous;
TextLine next = line.Next;
bool flag = true;
if (previous != null)
{
previous.Next = line.Next;
if (next != null)
{
next.Previous = previous;
}
else
{
this._last.SetLine(previous, this._last.LineIndex - 1);
this._last.ColumnIndex = this._last.Line.Length;
}
location.SetLine(previous, location.LineIndex - 1);
this._lineCount--;
}
else if (next != null)
{
next.Previous = null;
this._first.SetLine(next, 0);
location.SetLine(next, 0);
this._lineCount--;
}
else
{
line.Clear();
flag = false;
}
if (flag)
{
this.FixLocationLineNumbers(location.LineIndex, -1, location.Line, location.LineIndex, location.ColumnIndex);
}
return true;
}