/// <summary>
/// Initializes a new instance of the <see cref="UndoManager"/> class.
/// </summary>
/// <param name="root">The <see cref="UndoRoot"/> to use for undo/redo actions.</param>
/// <param name="setModified">An action called whenever a change is made.</param>
public UndoManager(UndoRoot root, Action setModified)
{
this.root = root;
this.setModified = setModified;
this.root.UndoStackChanged += UndoStackChanged;
this.root.RedoStackChanged += RedoStackChanged;
}
/// <summary>
/// Initializes a new instance of the <see cref="UndoManager"/> class.
/// </summary>
/// <param name="root">The <see cref="UndoRoot"/> to use for undo/redo actions.</param>
/// <param name="setModified">An action called whenever a change is made.</param>
public UndoManager(UndoRoot root, Action setModified)
{
this.root = root;
this.setModified = setModified;
this.root.UndoStackChanged += UndoStackChanged;
this.root.RedoStackChanged += RedoStackChanged;
}
public void UndoService_Uses_WeakReferences()
{
// Create a root, but don't keep any references to the object that it is for.
UndoRoot undoRoot = null;
WeakReference wrDoc = GetWeakReference(out undoRoot);
// Confirm the object is still alive.
Assert.IsNotNull(undoRoot);
Assert.IsTrue(wrDoc.IsAlive);
// Force a GC to collect the document used for the undo root.
// Don't do this in normal code... this is just for testing.
GC.Collect(1, GCCollectionMode.Forced, true);
// Confirm the RootDocument was collected.
// This shows that we're not leaking memory via the UndoService's _Roots dictionary.
Assert.IsFalse(wrDoc.IsAlive);
Assert.IsNull(wrDoc.Target);
// Inline function.
// This method is part of UndoService_Uses_WeakReferences.
// Code is in a separate method so that the variables are properly scoped
// which allows the GC call to work properly.
WeakReference GetWeakReference(out UndoRoot undoRoot)
{
var document = new RootDocument(); // Constructed, but not returned.
undoRoot = UndoService.Current[document]; // This creates a weakly referenced undo root.
return(new WeakReference(document)); // Return a weak reference so that we can test if the document was collected.
}
}
public MaskingVideoOverlayViewModelTests()
{
_scriptVideoContextMock = new Mock <IScriptVideoContext>();
_scriptVideoContextMock.Setup(svc => svc.HasVideo).Returns(true);
_scriptVideoContextMock.Setup(svc => svc.FrameNumber).Returns(0);
_scriptVideoContextMock.Setup(svc => svc.IsVideoPlaying).Returns(false);
_scriptVideoContextMock.Setup(svc => svc.VideoFrameCount).Returns(241);
_scriptVideoContextMock.Setup(svc => svc.SeekableVideoFrameCount).Returns(240);
_scriptVideoContextMock.Setup(svc => svc.VideoFrameSize).Returns(new SizeI(628, 472));
_scriptVideoServiceMock = new Mock <IScriptVideoService>();
_scriptVideoServiceMock.Setup(svs => svs.GetContextReference()).Returns(_scriptVideoContextMock.Object);
_mockMaskingProject = MockProjectFactory.CreateMockMaskingProject();
_projectServiceMock = new Mock <IProjectService>();
_projectServiceMock.Setup(ps => ps.Project).Returns(_mockMaskingProject);
_undoServiceMock = new Mock <IUndoService>();
_undoServiceMock.Setup(us => us[It.IsAny <object>()]).Returns((object root) =>
{
if (_undoRoot?.Root != root)
{
_undoRoot = new UndoRoot(root);
}
return(_undoRoot);
});
_undoChangeFactoryMock = new Mock <IChangeFactory>();
_systemDialogServiceMock = new Mock <ISystemDialogService>();
_systemDialogServiceMock.Setup(sds => sds.ShowErrorDialog(It.IsAny <string>(), It.IsAny <string>(), It.IsAny <Exception>()))
.Callback <string, string, Exception>((dialogTextParam, dialogCaptionParam, exceptionParam) =>
{
throw exceptionParam ?? new Exception(dialogTextParam);
});
_clipboardServiceMock = new Mock <IClipboardService>();
_applicationCommands = new ApplicationCommands();
_viewModel = new MaskingVideoOverlayViewModel(_scriptVideoServiceMock.Object, _undoServiceMock.Object, _undoChangeFactoryMock.Object, _applicationCommands, _projectServiceMock.Object, _systemDialogServiceMock.Object, _clipboardServiceMock.Object);
}
private void SetupViewModel(bool useRealUndoService = false)
{
_currentScriptVideoFrameNumber = 0;
_scriptVideoServiceMock = new Mock <IScriptVideoService>();
_scriptVideoServiceMock.SetupAdd(svs => svs.FrameChanged += It.IsAny <EventHandler <FrameChangedEventArgs> >());
_scriptVideoServiceMock.SetupRemove(svs => svs.FrameChanged -= It.IsAny <EventHandler <FrameChangedEventArgs> >());
_scriptVideoContextMock = new Mock <IScriptVideoContext>();
_scriptVideoContextMock.Setup(svc => svc.HasVideo).Returns(true);
_scriptVideoContextMock.SetupGet(svc => svc.FrameNumber).Returns(() => _currentScriptVideoFrameNumber);
_scriptVideoContextMock.SetupSet(svc => svc.FrameNumber = It.IsAny <int>()).Callback <int>(value =>
{
int previousFrameNumber = _currentScriptVideoFrameNumber;
_currentScriptVideoFrameNumber = value;
_scriptVideoServiceMock.Raise(svs => svs.FrameChanged += null, new FrameChangedEventArgs(previousFrameNumber, _currentScriptVideoFrameNumber));
});
_scriptVideoContextMock.Setup(svc => svc.IsVideoPlaying).Returns(false);
_scriptVideoContextMock.Setup(svc => svc.VideoFrameCount).Returns(400);
_scriptVideoContextMock.Setup(svc => svc.SeekableVideoFrameCount).Returns(399);
_scriptVideoContextMock.Setup(svc => svc.VideoFrameSize).Returns(new SizeI(640, 480));
_scriptVideoServiceMock.Setup(svs => svs.GetContextReference()).Returns(_scriptVideoContextMock.Object);
_timelineCommands = new TimelineCommands();
_applicationCommands = new ApplicationCommands();
if (useRealUndoService)
{
_undoService = UndoService.Current;
_undoService.Clear();
_undoChangeFactory = new ChangeFactory();
}
else
{
Mock <IUndoService> undoServiceMock;
Mock <IChangeFactory> undoChangeFactoryMock;
undoServiceMock = new Mock <IUndoService>();
undoServiceMock.Setup(us => us[It.IsAny <object>()]).Returns((object root) =>
{
if (_undoRoot?.Root != root)
{
_undoRoot = new UndoRoot(root);
}
return(_undoRoot);
});
_undoService = undoServiceMock.Object;
undoChangeFactoryMock = new Mock <IChangeFactory>();
_undoChangeFactory = undoChangeFactoryMock.Object;
}
_clipboardServiceMock = new Mock <IClipboardService>();
_dialogServiceMock = new Mock <IDialogService>();
_timelineSegmentProvidingViewModel = new MockTimelineSegmentProvidingViewModel(GenerateTestSegmentModels(), _scriptVideoServiceMock.Object, _undoService, _undoChangeFactory, _clipboardServiceMock.Object, _applicationCommands);
if (useRealUndoService)
{
_undoRoot = _undoService[_timelineSegmentProvidingViewModel];
}
_viewModel = new VideoTimelineViewModel(_scriptVideoServiceMock.Object, _undoService, _undoChangeFactory, _clipboardServiceMock.Object, _dialogServiceMock.Object, _timelineCommands)
{
TimelineSegmentProvidingViewModel = _timelineSegmentProvidingViewModel
};
_scriptVideoContextMock.Object.FrameNumber = 0;
}
