private void PackThis()
{
_undoUnits.Reset();
Interop.IOleUndoUnit[] startunits = new Interop.IOleUndoUnit[(uint)_startIndex];
Interop.IOleUndoUnit[] currentunits = new Interop.IOleUndoUnit[(uint)_numUndos];
//IntPtr j1 = IntPtr.Zero;
Interop.IOleUndoUnit unit = null;
int su = 0;
for (int k = 0; k < _startIndex; k++)
{
_undoUnits.Next(1, out unit, out su);
startunits[k] = unit;
}
for (int i = 0; i < _numUndos; i++)
{
_undoUnits.Next(1, out unit, out su);
currentunits[i] = unit;
}
((Interop.IOleUndoManager)_undoManager).DiscardFrom(null);
for (int j = 0; j < _startIndex; j++)
{
if (startunits[j] == null)
{
continue;
}
((Interop.IOleUndoManager)_undoManager).Add(startunits[j]);
}
if (unit != null)
{
UndoUnit uu = new UndoUnit(unit, ((Interop.IOleUndoManager)_undoManager));
((Interop.IOleUndoManager)_undoManager).Add(uu);
}
}
/// <summary>
/// Returns the collection of Undo/Redo objects available.
/// </summary>
/// <remarks>
/// The current type of unit object decided whether this method returns the Undo or Redo history.
/// The collections consists of <see cref="UndoObject"/> objects, which implement <see cref="IUndoObject"/>.
/// These objects may have information about subobjects, which the undo manager creates if the user
/// requests packed undo sequences.
/// </remarks>
/// <seealso cref="NumChildUndos"/>
/// <seealso cref="HasChildUndos"/>
/// <seealso cref="UndoObject"/>
/// <seealso cref="Type"/>
/// <returns>Returns a collection of objects of type <see cref="IUndoObject"/>.</returns>
public System.Collections.Generic.List <IUndoObject> GetUndoHistory()
{
int i = 0;
//IntPtr k = IntPtr.Zero;
Interop.IOleUndoUnit unit;
Interop.IEnumOleUndoUnits undoUnits = null;
if (_type == BatchedUndoType.Undo)
{
undoUnits = ((HtmlEditor)_editor).UndoManager.EnumUndoable();
}
else
{
undoUnits = ((HtmlEditor)_editor).UndoManager.EnumRedoable();
}
System.Collections.Generic.List <IUndoObject> undos = new System.Collections.Generic.List <IUndoObject>();
if (undoUnits != null)
{
undoUnits.Reset();
try
{
while (i == 0)
{
undoUnits.Next(1, out unit, out i);
if (undoUnits == null || i == 0)
{
break;
} //Interop.IOleUndoUnit unit = (Interop.IOleUndoUnit) Marshal.GetObjectForIUnknown(k);
string s;
unit.GetDescription(out s);
UndoUnit managedUndo = null;
if (unit is UndoUnit)
{
managedUndo = (UndoUnit)unit;
}
else
{
managedUndo = new UndoUnit(unit, ((HtmlEditor)_editor).UndoManager);
}
UndoObject wrappedObject = new UndoObject(s, managedUndo, ((HtmlEditor)_editor).UndoManager);
undos.Add(wrappedObject);
i = 0;
}
}
catch
{
}
}
return(undos);
}
internal UndoObject(string description, UndoUnit unit, Interop.IOleUndoManager undoManager)
{
this.description = description;
this.unit = unit;
this.undoManager = undoManager;
}
