public void TestEditingStackOperations()
{
var commands = new XTMFCommand[20];
for ( int i = 0; i < commands.Length; i++ )
{
commands[i] = new TestCommand();
}
EditingStack stack = new EditingStack( 10 );
Assert.AreEqual( 0, stack.Count, "The stack's count is incorrect!" );
// fill the stack
for ( int i = 0; i < 10; i++ )
{
stack.Add( commands[i] );
Assert.AreEqual( i + 1, stack.Count, "The stack's count is incorrect!" );
}
// over fill the stack
for ( int i = 10; i < 20; i++ )
{
stack.Add( commands[i] );
Assert.AreEqual( 10, stack.Count, "The stack's count is incorrect!" );
}
// Make sure the first don't exist anymore
for ( int i = 0; i < 10; i++ )
{
Assert.AreEqual( false, stack.Contains( commands[i] ), "The stack retained a command it should have lost!" );
}
// Make sure the newer ones still exist
for ( int i = 10; i < 20; i++ )
{
Assert.AreEqual( true, stack.Contains( commands[i] ), "The stack lost a command it should have retained!" );
}
XTMFCommand command;
for ( int i = 19; i >= 10; i-- )
{
if ( stack.TryPop( out command ) )
{
Assert.AreEqual( commands[i], command, "While popping we popped an unexpected command!" );
}
else
{
Assert.Fail( "A pop failed that should have succeeded!" );
}
}
}
public XTMFCommand GetCombinedCommand()
{
// Generate a command the combines all of the contained commands
return(XTMFCommand.CreateCommand("Batch command",
(ref string error) =>
{
foreach (var command in Commands)
{
if (!command.Do(ref error))
{
return false;
}
}
return true;
},
(ref string error) =>
{
foreach (var command in ((IEnumerable <XTMFCommand>)Commands).Reverse())
{
if (!command.Undo(ref error))
{
return false;
}
}
return true;
},
(ref string error) =>
{
foreach (var command in Commands)
{
if (!command.Redo(ref error))
{
return false;
}
}
return true;
}));
}
public void AddCommand(XTMFCommand command)
{
Commands.Add(command);
}
public bool RunCommand(XTMFCommand command, ref string error)
{
lock (SessionLock)
{
if(_IsRunning)
{
error = "You can not edit a model system while it is running.";
return false;
}
if(command.Do(ref error))
{
if(command.CanUndo())
{
UndoStack.Add(command);
}
// if we do something new, redo no long is available
RedoStack.Clear();
return true;
}
return false;
}
}
