/// <summary>
/// Runs the specified operation.
/// </summary>
/// <param name="editor">The active editor or null.</param>
/// <param name="line">The active line or null.</param>
/// <param name="operation">The operation to run.</param>
/// <param name="right">True for right, false for left.</param>
/// <param name="alt">True for the alternative operation.</param>
static void Run(IEditor editor, ILine line, Operation operation, bool right, bool alt)
{
Point caret = line == null ? editor.Caret : new Point(line.Caret, 0);
int iColumn = caret.X;
int iLine = caret.Y;
for (; ;)
{
ILine currentLine = line ?? editor[iLine];
var text = currentLine.Text;
int newX = -1;
foreach (Match match in Regex.Matches(text))
{
if (right)
{
if (match.Index > iColumn)
{
newX = match.Index;
break;
}
}
else
{
if (match.Index >= iColumn)
{
break;
}
newX = match.Index;
}
}
// :: new position is not found in the line
if (newX < 0)
{
if (alt || line != null)
{
return;
}
if (right)
{
if (++iLine >= editor.Count)
{
return;
}
iColumn = -1;
}
else
{
if (--iLine < 0)
{
return;
}
iColumn = int.MaxValue;
}
continue;
}
if (operation == Operation.Step)
{
// :: step
if (line == null)
{
editor.GoTo(newX, iLine);
editor.UnselectText();
editor.Redraw();
}
else
{
//_100819_142053 Mantis#1464 Here was a kludge
line.UnselectText();
line.Caret = newX;
}
}
else if (operation == Operation.Select)
{
// :: select
if (alt)
{
SelectColumn(editor, right, iLine, caret.X, newX);
}
else
{
SelectStream(editor, line, right, caret, new Point(newX, iLine));
}
}
else
{
// :: delete
if (line == null)
{
if (!right && newX == 0 && caret.X > 0 && currentLine.Length == 0)
{
// "Cursor beyond end of line" and the line is empty
editor.UnselectText();
editor.GoToColumn(0);
}
else
{
// select the step text and delete it
if (!editor.SelectionExists)
{
if (right)
{
editor.SelectText(caret.X, caret.Y, newX - 1, iLine);
}
else
{
editor.SelectText(newX, iLine, caret.X - 1, caret.Y);
}
}
editor.DeleteText();
}
editor.Redraw();
}
else
{
if (line.SelectionSpan.Length <= 0)
{
if (right)
{
line.SelectText(caret.X, newX);
}
else
{
line.SelectText(newX, caret.X);
}
}
newX = line.SelectionSpan.Start;
line.SelectedText = string.Empty;
line.Caret = newX;
}
}
return;
}
}
/// <summary>
/// Runs the specified operation.
/// </summary>
/// <param name="editor">The active editor or null.</param>
/// <param name="line">The active line or null.</param>
/// <param name="operation">The operation to run.</param>
/// <param name="right">True for right, false for left.</param>
/// <param name="alt">True for the alternative operation.</param>
static void Run(IEditor editor, ILine line, Operation operation, bool right, bool alt)
{
Point caret = line == null ? editor.Caret : new Point(line.Caret, 0);
int iColumn = caret.X;
int iLine = caret.Y;
for (; ; )
{
ILine currentLine = line ?? editor[iLine];
var text = currentLine.Text;
int newX = -1;
foreach (Match match in Regex.Matches(text))
{
if (right)
{
if (match.Index > iColumn)
{
newX = match.Index;
break;
}
}
else
{
if (match.Index >= iColumn)
break;
newX = match.Index;
}
}
// :: new position is not found in the line
if (newX < 0)
{
if (alt || line != null)
return;
if (right)
{
if (++iLine >= editor.Count)
return;
iColumn = -1;
}
else
{
if (--iLine < 0)
return;
iColumn = int.MaxValue;
}
continue;
}
if (operation == Operation.Step)
{
// :: step
if (line == null)
{
editor.GoTo(newX, iLine);
editor.UnselectText();
editor.Redraw();
}
else
{
//_100819_142053 Mantis#1464 Here was a kludge
line.UnselectText();
line.Caret = newX;
}
}
else if (operation == Operation.Select)
{
// :: select
if (alt)
SelectColumn(editor, right, iLine, caret.X, newX);
else
SelectStream(editor, line, right, caret, new Point(newX, iLine));
}
else
{
// :: delete
if (line == null)
{
if (!right && newX == 0 && caret.X > 0 && currentLine.Length == 0)
{
// "Cursor beyond end of line" and the line is empty
editor.UnselectText();
editor.GoToColumn(0);
}
else
{
// select the step text and delete it
if (!editor.SelectionExists)
{
if (right)
editor.SelectText(caret.X, caret.Y, newX - 1, iLine);
else
editor.SelectText(newX, iLine, caret.X - 1, caret.Y);
}
editor.DeleteText();
}
editor.Redraw();
}
else
{
if (line.SelectionSpan.Length <= 0)
{
if (right)
line.SelectText(caret.X, newX);
else
line.SelectText(newX, caret.X);
}
newX = line.SelectionSpan.Start;
line.SelectedText = string.Empty;
line.Caret = newX;
}
}
return;
}
}