private void CheckPopUnit(PopUnitReason reason)
{
if ((reason != PopUnitReason.Normal) || !this._host.InTransaction)
{
UndoUnit unit = (UndoUnit)this._unitStack.Pop();
if (!unit.IsEmpty)
{
unit.Close();
if (reason != PopUnitReason.TransactionCancel)
{
if (this._unitStack.Count == 0)
{
this.AddUndoUnit(unit);
}
}
else
{
unit.Undo();
if (this._unitStack.Count == 0)
{
this.DiscardUndoUnit(unit);
}
}
}
else if (this._unitStack.Count == 0)
{
this.DiscardUndoUnit(unit);
}
}
}
public void Redo()
{
if (disposed)
{
Debug.Assert(false);
throw new InvalidOperationException();
}
if (OnBeforeUndoRedo != null)
{
OnBeforeUndoRedo.Invoke(this, EventArgs.Empty);
}
UndoUnit info = redo.Pop();
try
{
SaveUndoInfo(false /*redo*/, false /*purgeRedo*/, info.Label);
info.Inner.Do(client);
}
finally
{
IDisposable dispInfoInner = info.Inner as IDisposable;
if (dispInfoInner != null)
{
dispInfoInner.Dispose();
}
if (OnAfterUndoRedo != null)
{
OnAfterUndoRedo.Invoke(this, EventArgs.Empty);
}
}
}
// FIXME: there could be more transactions opened and closed (but not commited) after the first one!!!
// This means that there should be multiple units. Only the top level transaction is commited though
//
private void OnTransactionOpened (object sender, EventArgs args)
{
if (_currentUnit == null) {
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
_currentUnit = CreateUndoUnit (host.TransactionDescription, true);
}
}
private void OnComponentAdding(object sender, ComponentEventArgs args)
{
if (_currentUnit == null)
{
_currentUnit = CreateUndoUnit("Add " + args.Component.GetType().Name, true);
}
_currentUnit.ComponentAdding(args);
}
private void OnComponentRemoving(object sender, ComponentEventArgs args)
{
if (_currentUnit == null)
{
_currentUnit = CreateUndoUnit("Remove " + args.Component.Site.Name, true);
}
_currentUnit.ComponentRemoving(args);
}
private void OnComponentChanging (object sender, ComponentChangingEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Modify " + ((IComponent)args.Component).Site.Name +
(args.Member != null ? "." + args.Member.Name : ""),
true);
_currentUnit.ComponentChanging (args);
}
protected virtual void Dispose (bool disposing)
{
if (disposing) {
if (_currentUnit != null) {
_currentUnit.Close ();
_currentUnit = null;
}
}
}
protected UndoEngine (IServiceProvider provider)
{
if (provider == null)
throw new ArgumentNullException ("provider");
_provider = provider;
_currentUnit = null;
Enable ();
}
protected UndoEngine (IServiceProvider provider)
{
if (provider == null)
throw new ArgumentNullException ("provider");
_provider = provider;
_currentUnit = null;
Enable ();
}
public void DoUndo()
{
if (this.currentPos > 0)
{
UndoUnit undoUnit = this.undoUnitList[this.currentPos - 1];
undoUnit.Undo();
this.currentPos--;
}
this.UpdateUndoRedoMenuCommandsStatus();
}
public void DoRedo()
{
if (this.currentPos < this.undoUnitList.Count)
{
UndoUnit undoUnit = this.undoUnitList[this.currentPos];
undoUnit.Undo();
this.currentPos++;
}
this.UpdateUndoRedoMenuCommandsStatus();
}
public void AddUndo(UndoUnit unit)
{
if (this.PerformingAction)
{
this.actionsRecorded.Add(unit);
}
else if (!this.UndoingRedoing)
{
this.undoStack.Push(new UndoCollection(unit));
this.redoStack.Clear();
}
}
private void OnComponentRename (object sender, ComponentRenameEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Rename " + ((IComponent)args.Component).Site.Name, true);
_currentUnit.ComponentRename (args);
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
if (!host.InTransaction) {
_currentUnit.Close ();
AddUndoUnit (_currentUnit);
_currentUnit = null;
}
}
public void Undo(int actionsCount)
{
if (actionsCount <= 0 || actionsCount > _undoUnits.Count)
{
return;
}
for (; actionsCount != 0; actionsCount--)
{
UndoUnit unit = _undoUnits.Pop();
// Console.WriteLine ("undo: " + unit.Name);
unit.Undo();
_redoUnits.Push(unit);
}
}
private void OnComponentChanged (object sender, ComponentChangedEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Modify " + ((IComponent)args.Component).Site.Name + "." +
(args.Member != null ? "." + args.Member.Name : ""),
true);
_currentUnit.ComponentChanged (args);
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
if (!host.InTransaction) {
_currentUnit.Close ();
AddUndoUnit (_currentUnit);
_currentUnit = null;
}
}
private void OnTransactionClosed (object sender, DesignerTransactionCloseEventArgs args)
{
// Console.WriteLine ("TransactionClosed: Commited: " + args.TransactionCommitted.ToString ());
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
if (!host.InTransaction) { // the "top-most"/last transaction was closed (currentUnit one)
_currentUnit.Close ();
if (args.TransactionCommitted) {
AddUndoUnit (_currentUnit);
} else {
_currentUnit.Undo ();
DiscardUndoUnit (_currentUnit);
}
_currentUnit = null;
}
}
private void OnComponentRemoved(object sender, ComponentEventArgs args)
{
if (_currentUnit == null)
{
_currentUnit = CreateUndoUnit("Remove " + args.Component.GetType().Name, true);
}
_currentUnit.ComponentRemoved(args);
IDesignerHost host = GetRequiredService(typeof(IDesignerHost)) as IDesignerHost;
if (!host.InTransaction)
{
_currentUnit.Close();
AddUndoUnit(_currentUnit);
_currentUnit = null;
}
}
protected override void DiscardUndoUnit(UndoUnit unit)
{
this.undoUnitList.Remove(unit);
base.DiscardUndoUnit(unit);
}
protected virtual void DiscardUndoUnit(UndoUnit unit)
{
}
protected override void DiscardUndoUnit(UndoUnit unit)
{
undoUnitList.Remove(unit);
base.DiscardUndoUnit(unit);
}
private void OnComponentRename (object sender, ComponentRenameEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Rename " + ((IComponent)args.Component).Site.Name, true);
_currentUnit.ComponentRename (args);
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
if (!host.InTransaction) {
_currentUnit.Close ();
AddUndoUnit (_currentUnit);
_currentUnit = null;
}
}
private void OnComponentChanging (object sender, ComponentChangingEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Modify " + ((IComponent)args.Component).Site.Name +
(args.Member != null ? "." + args.Member.Name : ""),
true);
_currentUnit.ComponentChanging (args);
}
private void OnComponentAdding (object sender, ComponentEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Add " + args.Component.GetType ().Name, true);
_currentUnit.ComponentAdding (args);
}
private void AddUndo(int command, int startLine, int startIndex, int endLine, int endIndex, object data)
{
UndoUnit unit = new UndoUnit(command, startLine, startIndex, endLine, endIndex, data);
if (this._batchUndoCount > 0)
{
((BatchUndoUnit) this.UndoStack.Peek()).AddUndoUnit(unit);
}
else
{
this.UndoStack.Push(unit);
}
}
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();
}
protected override void AddUndoUnit(UndoUnit unit)
{
this.undoUnitList.RemoveRange(this.currentPos, this.undoUnitList.Count - this.currentPos);
this.undoUnitList.Add(unit);
this.currentPos = this.undoUnitList.Count;
}
protected override void AddUndoUnit(UndoUnit unit)
{
this.undoUnitList.RemoveRange(this.currentPos, this.undoUnitList.Count - this.currentPos);
this.undoUnitList.Add(unit);
this.currentPos = this.undoUnitList.Count;
}
protected abstract void AddUndoUnit(UndoUnit unit);
private void OnTransactionClosed (object sender, DesignerTransactionCloseEventArgs args)
{
// Console.WriteLine ("TransactionClosed: Commited: " + args.TransactionCommitted.ToString ());
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
if (!host.InTransaction) { // the "top-most"/last transaction was closed (currentUnit one)
_currentUnit.Close ();
if (args.TransactionCommitted) {
AddUndoUnit (_currentUnit);
} else {
_currentUnit.Undo ();
DiscardUndoUnit (_currentUnit);
}
_currentUnit = null;
}
}
protected virtual void DiscardUndoUnit(UndoUnit unit)
{
}
private void OnComponentRemoving (object sender, ComponentEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Remove " + args.Component.Site.Name, true);
_currentUnit.ComponentRemoving (args);
}
protected abstract void AddUndoUnit(UndoUnit unit);
private void OnComponentChanged (object sender, ComponentChangedEventArgs args)
{
if (_currentUnit == null)
_currentUnit = CreateUndoUnit ("Modify " + ((IComponent)args.Component).Site.Name + "." +
(args.Member != null ? "." + args.Member.Name : ""),
true);
_currentUnit.ComponentChanged (args);
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
if (!host.InTransaction) {
_currentUnit.Close ();
AddUndoUnit (_currentUnit);
_currentUnit = null;
}
}
protected virtual void DiscardUndoUnit(UndoUnit unit)
{
throw null;
}
protected virtual void Dispose (bool disposing)
{
if (disposing) {
if (_currentUnit != null) {
_currentUnit.Close ();
_currentUnit = null;
}
}
}
protected override void AddUndoUnit(UndoUnit unit)
{
undoUnitList.RemoveRange(currentPos, undoUnitList.Count - currentPos);
undoUnitList.Add(unit);
currentPos = undoUnitList.Count;
}
// FIXME: there could be more transactions opened and closed (but not commited) after the first one!!!
// This means that there should be multiple units. Only the top level transaction is commited though
//
private void OnTransactionOpened (object sender, EventArgs args)
{
if (_currentUnit == null) {
IDesignerHost host = GetRequiredService (typeof (IDesignerHost)) as IDesignerHost;
_currentUnit = CreateUndoUnit (host.TransactionDescription, true);
}
}
protected override void AddUndoUnit(UndoUnit unit)
{
}
