/// <summary>
/// Undoes the last step.
/// </summary>
/// <param name="buffer">Buffer to use</param>
/// <remarks>Used internally, don't use!</remarks>
internal UndoStep Undo(ref BufferManager buffer)
{
if (UndoStack.Count > 0) {
UndoStep step = (UndoStep)UndoStack.Peek();
RedoStack.Push(step);
UndoStack.Pop();
switch (step.Action) {
case UndoAction.Insert :
buffer.SetBytes(step.Start, step.GetBytes(), false);
break;
case UndoAction.Remove :
buffer.RemoveBytes(step.Start, step.GetBytes().Length);
break;
case UndoAction.Overwrite :
buffer.SetBytes(step.Start, step.GetOldBytes(), true);
break;
}
EventHandler<UndoEventArgs> temp = ActionUndone;
if (temp != null)
temp(this, new UndoEventArgs(step, true));
return step;
}
return null;
}
public SelectionManager(ref BufferManager buffer)
{
this.buffer = buffer;
}
/// <summary>
/// Creates a new HexEditor Control with basic settings and initialises all components.
/// </summary>
public Editor()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
buffer = new BufferManager(this);
selection = new SelectionManager(ref buffer);
undoStack = new UndoManager();
insertmode = true;
underscorewidth = MeasureStringWidth(this.CreateGraphics(), "_", Settings.DataFont);
underscorewidth3 = underscorewidth * 3;
fontheight = GetFontHeight(Settings.DataFont);
selregion = new Rectangle[] {};
selpoints = new Point[] {};
headertext = GetHeaderText();
this.ActiveView = this.hexView;
UpdatePainters();
caret = new Caret(this.gbHex, 1, fontheight, 0);
HexEditSizeChanged(null, EventArgs.Empty);
AdjustScrollBar();
this.Invalidate();
}
public SelectionManager(ref BufferManager buffer)
{
this.buffer = buffer;
}
