public override HistoryMemento OnExecute(IHistoryWorkspace historyWorkspace)
{
if (layer1Index < 0 || layer1Index >= historyWorkspace.Document.Layers.Count ||
layer2Index < 0 || layer2Index >= historyWorkspace.Document.Layers.Count)
{
throw new ArgumentOutOfRangeException("layer1Index = " + this.layer1Index + ", layer2Index = " + layer2Index + ", expected [0," + historyWorkspace.Document.Layers.Count + ")");
}
SwapLayerHistoryMemento slhm = new SwapLayerHistoryMemento(
StaticName,
StaticImage,
historyWorkspace,
layer1Index,
layer2Index);
Layer layer1 = historyWorkspace.Document.Layers.GetAt(layer1Index);
Layer layer2 = historyWorkspace.Document.Layers.GetAt(layer2Index);
EnterCriticalRegion();
historyWorkspace.Document.Layers[layer1Index] = layer2;
historyWorkspace.Document.Layers[layer2Index] = layer1;
layer1.Invalidate();
layer2.Invalidate();
return slhm;
}
protected override HistoryMemento OnUndo()
{
SwapLayerHistoryMemento slha = new SwapLayerHistoryMemento(this.Name, this.Image,
this.historyWorkspace, this.layerIndex2, this.layerIndex1);
Layer layer1 = (Layer)this.historyWorkspace.Document.Layers[this.layerIndex1];
Layer layer2 = (Layer)this.historyWorkspace.Document.Layers[this.layerIndex2];
int firstIndex = Math.Min(layerIndex1, layerIndex2);
int secondIndex = Math.Max(layerIndex1, layerIndex2);
if (secondIndex - firstIndex == 1)
{
this.historyWorkspace.Document.Layers.RemoveAt(layerIndex1);
this.historyWorkspace.Document.Layers.Insert(layerIndex2, layer1);
}
else
{
// general version
this.historyWorkspace.Document.Layers[layerIndex1] = layer2;
this.historyWorkspace.Document.Layers[layerIndex2] = layer1;
}
((Layer)this.historyWorkspace.Document.Layers[this.layerIndex1]).Invalidate();
((Layer)this.historyWorkspace.Document.Layers[this.layerIndex2]).Invalidate();
return(slha);
}
protected override HistoryMemento OnUndo()
{
SwapLayerHistoryMemento slha = new SwapLayerHistoryMemento(this.Name, this.Image,
this.historyWorkspace, this.layerIndex2, this.layerIndex1);
Layer layer1 = (Layer)this.historyWorkspace.Document.Layers[this.layerIndex1];
Layer layer2 = (Layer)this.historyWorkspace.Document.Layers[this.layerIndex2];
int firstIndex = Math.Min(layerIndex1, layerIndex2);
int secondIndex = Math.Max(layerIndex1, layerIndex2);
if (secondIndex - firstIndex == 1)
{
this.historyWorkspace.Document.Layers.RemoveAt(layerIndex1);
this.historyWorkspace.Document.Layers.Insert(layerIndex2, layer1);
}
else
{
// general version
this.historyWorkspace.Document.Layers[layerIndex1] = layer2;
this.historyWorkspace.Document.Layers[layerIndex2] = layer1;
}
((Layer)this.historyWorkspace.Document.Layers[this.layerIndex1]).Invalidate();
((Layer)this.historyWorkspace.Document.Layers[this.layerIndex2]).Invalidate();
return slha;
}
public override HistoryMemento PerformAction(DocumentWorkspace documentWorkspace)
{
HistoryMemento hm = null;
int index = documentWorkspace.ActiveLayerIndex;
if (index != 0)
{
SwapLayerHistoryMemento slhm = new SwapLayerHistoryMemento(
StaticName,
StaticImage,
documentWorkspace,
index,
index - 1);
hm = slhm.PerformUndo();
}
return hm;
}
protected override HistoryMemento OnUndo(ProgressEventHandler progressCallback)
{
SwapLayerHistoryMemento memento = new SwapLayerHistoryMemento(base.Name, base.Image, this.historyWorkspace, this.layerIndex2, this.layerIndex1);
using (this.historyWorkspace.Document.Layers.UseChangeScope())
{
Layer item = (Layer)this.historyWorkspace.Document.Layers[this.layerIndex1];
Layer layer2 = (Layer)this.historyWorkspace.Document.Layers[this.layerIndex2];
int num = Math.Min(this.layerIndex1, this.layerIndex2);
if ((Math.Max(this.layerIndex1, this.layerIndex2) - num) == 1)
{
this.historyWorkspace.Document.Layers.RemoveAt(this.layerIndex1);
this.historyWorkspace.Document.Layers.Insert(this.layerIndex2, item);
}
else
{
this.historyWorkspace.Document.Layers[this.layerIndex1] = layer2;
this.historyWorkspace.Document.Layers[this.layerIndex2] = item;
}
this.historyWorkspace.Document.Invalidate();
}
return(memento);
}