private static void ClearNode(IUndoRedoService actionService, AssetViewModel asset, ItemToReload itemToReload)
{
// Get the node we want to change
var index = itemToReload.GraphPathIndex;
var node = itemToReload.GraphPath.GetNode();
var oldValue = node.Retrieve(index);
// Apply the change
// TODO: Share this code with ContentValueChangeOperation?
// TODO: How to better detect CollectionAdd vs ValueChange?
ContentChangeType operationType;
if (index != NodeIndex.Empty)
{
if (CollectionItemIdHelper.TryGetCollectionItemIds(node.Retrieve(), out CollectionItemIdentifiers ids))
{
itemToReload.ItemId = ids[index.Value];
}
operationType = ContentChangeType.CollectionRemove;
((IObjectNode)node).Remove(oldValue, index);
}
else
{
operationType = ContentChangeType.ValueChange;
((IMemberNode)node).Update(null);
}
// Save the change on the stack
var operation = new ContentValueChangeOperation(node, operationType, index, oldValue, null, Enumerable.Empty <IDirtiable>());
actionService.PushOperation(operation);
string operationName = $"Unload object {oldValue.GetType().Name} in asset {asset.Url}";
actionService.SetName(operation, operationName);
}
private static void ReplaceNode(IUndoRedoService actionService, AssetViewModel asset, ItemToReload itemToReload)
{
// Get the node we want to change
var graphPath = itemToReload.GraphPath;
var index = itemToReload.GraphPathIndex;
var node = graphPath.GetNode();
// Apply the change
// TODO: Share this code with ContentValueChangeOperation?
// TODO: How to better detect CollectionAdd vs ValueChange?
ContentChangeType operationType;
if (index != NodeIndex.Empty)
{
operationType = ContentChangeType.CollectionAdd;
((IAssetObjectNode)node).Restore(itemToReload.UpdatedObject, index, itemToReload.ItemId);
}
else
{
operationType = ContentChangeType.ValueChange;
((IMemberNode)node).Update(itemToReload.UpdatedObject);
}
// Save the change on the stack
var operation = new ContentValueChangeOperation(node, operationType, index, null, itemToReload.UpdatedObject, asset.Dirtiables);
actionService.PushOperation(operation);
string operationName = $"Reload object {itemToReload.UpdatedObject.GetType().Name} in asset {asset.Url}";
actionService.SetName(operation, operationName);
}
/// <summary>
/// Sets the current value of the graph node.
/// </summary>
/// <param name="value">The value to set for the graph node content.</param>
/// <remarks>This method can be invoked from a property setter.</remarks>
/// <remarks>This method will invoke the delegates passed to the constructor of this instance if the new value is different from the previous one.</remarks>
public void SetNodeValue(TTargetType value)
{
using (var transaction = actionService?.CreateTransaction())
{
node.Update(converter(value));
actionService?.SetName(transaction, $"Update property {propertyName}");
}
}