public ChangedEventArgs FindBeforeChangingEdit()
{
if (!this.IsBeforeChanging)
{
DiagramDocument document1 = this.Document;
if (document1 == null)
{
return(null);
}
DiagramUndoManager manager1 = document1.UndoManager;
if (manager1 == null)
{
return(null);
}
UndoManagerCompoundEdit edit1 = manager1.CurrentEdit;
if (edit1 == null)
{
return(null);
}
IList list1 = edit1.AllEdits;
for (int num1 = list1.Count - 1; num1 >= 0; num1--)
{
ChangedEventArgs args1 = list1[num1] as ChangedEventArgs;
if ((((args1 != null) && args1.IsBeforeChanging) && ((args1.Document == this.Document) && (args1.Hint == this.Hint))) && ((args1.SubHint == this.SubHint) && (args1.Object == this.Object)))
{
return(args1);
}
}
}
return(null);
}
public virtual void DocumentChanged(object sender, ChangedEventArgs e)
{
if ((!this.IsUndoing && !this.IsRedoing) && !this.SkipEvent(e))
{
UndoManagerCompoundEdit edit1 = this.CurrentEdit;
if (edit1 == null)
{
edit1 = new UndoManagerCompoundEdit();
this.CurrentEdit = edit1;
}
ChangedEventArgs args1 = new ChangedEventArgs(e);
edit1.AddEdit(args1);
if (this.ChecksTransactionLevel && (this.TransactionLevel <= 0))
{
Shapes.DiagramShape.Trace("Change not within a transaction: " + args1.ToString());
}
}
}
public virtual bool EndTransaction(bool commit, string pname)
{
if (this.myLevel > 0)
{
this.myLevel--;
}
UndoManagerCompoundEdit edit1 = this.CurrentEdit;
if ((this.myLevel == 0) && (edit1 != null))
{
if (commit)
{
edit1.IsComplete = true;
if (edit1.AllEdits.Count > 0)
{
if (pname != null)
{
edit1.PresentationName = pname;
}
for (int num1 = this.myCompEdits.Count - 1; num1 > this.myCurrentEditIndex; num1--)
{
IUndoableEdit edit2 = (IUndoableEdit)this.myCompEdits[num1];
edit2.Clear();
this.myCompEdits.RemoveAt(num1);
}
if ((this.MaximumEditCount > 0) && (this.myCompEdits.Count >= this.MaximumEditCount))
{
IUndoableEdit edit3 = (IUndoableEdit)this.myCompEdits[0];
edit3.Clear();
this.myCompEdits.RemoveAt(0);
this.myCurrentEditIndex--;
}
this.myCompEdits.Add(edit1);
this.myCurrentEditIndex++;
}
this.CurrentEdit = null;
return(true);
}
edit1.Clear();
this.CurrentEdit = null;
}
return(false);
}
public virtual void DocumentChanged(object sender, ChangedEventArgs e)
{
if ((!this.IsUndoing && !this.IsRedoing) && !this.SkipEvent(e))
{
UndoManagerCompoundEdit edit1 = this.CurrentEdit;
if (edit1 == null)
{
edit1 = new UndoManagerCompoundEdit();
this.CurrentEdit = edit1;
}
ChangedEventArgs args1 = new ChangedEventArgs(e);
edit1.AddEdit(args1);
if (this.ChecksTransactionLevel && (this.TransactionLevel <= 0))
{
Shapes.DiagramShape.Trace("Change not within a transaction: " + args1.ToString());
}
}
}
