/// <summary>
/// Paste ISelectable objects from the clipboard to the workspace.
/// </summary>
public void Paste()
{
//clear the selection so we can put the
//paste contents in
DynamoSelection.Instance.ClearSelection();
//make a lookup table to store the guids of the
//old models and the guids of their pasted versions
var modelLookup = new Dictionary<Guid, ModelBase>();
//make a list of all newly created models so that their
//creations can be recorded in the undo recorder.
var createdModels = new List<ModelBase>();
var nodes = ClipBoard.OfType<NodeModel>();
var connectors = ClipBoard.OfType<ConnectorModel>();
var notes = ClipBoard.OfType<NoteModel>();
var annotations = ClipBoard.OfType<AnnotationModel>();
var minX = Double.MaxValue;
var minY = Double.MaxValue;
// Create the new NoteModel's
var newNoteModels = new List<NoteModel>();
foreach (var note in notes)
{
var noteModel = new NoteModel(note.X, note.Y, note.Text, Guid.NewGuid());
//Store the old note as Key and newnote as value.
modelLookup.Add(note.GUID,noteModel);
newNoteModels.Add(noteModel);
minX = Math.Min(note.X, minX);
minY = Math.Min(note.Y, minY);
}
var xmlDoc = new XmlDocument();
// Create the new NodeModel's
var newNodeModels = new List<NodeModel>();
foreach (var node in nodes)
{
NodeModel newNode;
if (CurrentWorkspace is HomeWorkspaceModel && (node is Symbol || node is Output))
{
var symbol = (node is Symbol
? (node as Symbol).InputSymbol
: (node as Output).Symbol);
var code = (string.IsNullOrEmpty(symbol) ? "x" : symbol) + ";";
newNode = new CodeBlockNodeModel(code, node.X, node.Y, LibraryServices, CurrentWorkspace.ElementResolver);
}
else
{
var dynEl = node.Serialize(xmlDoc, SaveContext.Copy);
newNode = NodeFactory.CreateNodeFromXml(dynEl, SaveContext.Copy, CurrentWorkspace.ElementResolver);
}
var lacing = node.ArgumentLacing.ToString();
newNode.UpdateValue(new UpdateValueParams("ArgumentLacing", lacing));
if (!string.IsNullOrEmpty(node.NickName))
newNode.NickName = node.NickName;
modelLookup.Add(node.GUID, newNode);
newNodeModels.Add( newNode );
minX = Math.Min(node.X, minX);
minY = Math.Min(node.Y, minY);
}
// Move all of the notes and nodes such that they are aligned with
// the top left of the workspace
var workspaceX = -CurrentWorkspace.X / CurrentWorkspace.Zoom;
var workspaceY = -CurrentWorkspace.Y / CurrentWorkspace.Zoom;
// Provide a small offset when pasting so duplicate pastes aren't directly on top of each other
CurrentWorkspace.IncrementPasteOffset();
var shiftX = workspaceX - minX + CurrentWorkspace.CurrentPasteOffset;
var shiftY = workspaceY - minY + CurrentWorkspace.CurrentPasteOffset;
foreach (var model in newNodeModels.Concat<ModelBase>(newNoteModels))
{
model.X = model.X + shiftX;
model.Y = model.Y + shiftY;
}
// Add the new NodeModel's to the Workspace
foreach (var newNode in newNodeModels)
{
CurrentWorkspace.AddAndRegisterNode(newNode, false);
createdModels.Add(newNode);
AddToSelection(newNode);
}
// TODO: is this required?
OnRequestLayoutUpdate(this, EventArgs.Empty);
// Add the new NoteModel's to the Workspace
foreach (var newNote in newNoteModels)
{
CurrentWorkspace.AddNote(newNote, false);
createdModels.Add(newNote);
AddToSelection(newNote);
}
ModelBase start;
ModelBase end;
var newConnectors =
from c in connectors
// If the guid is in nodeLookup, then we connect to the new pasted node. Otherwise we
// re-connect to the original.
let startNode =
modelLookup.TryGetValue(c.Start.Owner.GUID, out start)
? start as NodeModel
: CurrentWorkspace.Nodes.FirstOrDefault(x => x.GUID == c.Start.Owner.GUID)
let endNode =
modelLookup.TryGetValue(c.End.Owner.GUID, out end)
? end as NodeModel
: CurrentWorkspace.Nodes.FirstOrDefault(x => x.GUID == c.End.Owner.GUID)
// Don't make a connector if either end is null.
where startNode != null && endNode != null
select
ConnectorModel.Make(startNode, endNode, c.Start.Index, c.End.Index);
createdModels.AddRange(newConnectors);
//Grouping depends on the selected node models.
//so adding the group after nodes / notes are added to workspace.
//select only those nodes that are part of a group.
var newAnnotations = new List<AnnotationModel>();
foreach (var annotation in annotations)
{
var annotationNodeModel = new List<NodeModel>();
var annotationNoteModel = new List<NoteModel>();
//checked condition here that supports pasting of multiple groups
foreach (var models in annotation.SelectedModels)
{
ModelBase mbase;
modelLookup.TryGetValue(models.GUID, out mbase);
if (mbase is NodeModel)
{
annotationNodeModel.Add(mbase as NodeModel);
}
if (mbase is NoteModel)
{
annotationNoteModel.Add(mbase as NoteModel);
}
}
var annotationModel = new AnnotationModel(annotationNodeModel, annotationNoteModel)
{
GUID = Guid.NewGuid(),
AnnotationText = annotation.AnnotationText,
Background = annotation.Background,
FontSize = annotation.FontSize
};
newAnnotations.Add(annotationModel);
}
// Add the new Annotation's to the Workspace
foreach (var newAnnotation in newAnnotations)
{
CurrentWorkspace.AddAnnotation(newAnnotation);
createdModels.Add(newAnnotation);
AddToSelection(newAnnotation);
}
// Record models that are created as part of the command.
CurrentWorkspace.RecordCreatedModels(createdModels);
}
