/// <summary>
/// Clone a block from this block
/// </summary>
public Block Clone()
{
XmlNode xmlNode = Xml.BlockToDomWithXY(this, true);
Block newBlock = Xml.DomToBlock(xmlNode, Workspace);
Workspace.AddTopBlock(newBlock);
return(newBlock);
}
/// <summary>
/// Decode an XML DOM and create blocks on the workspace.
/// </summary>
/// <param name="dom">XML DOM</param>
/// <param name="workspace">The WOrkspace</param>
public static List <string> DomToWorkspace(XmlNode xml, Workspace workspace)
{
List <string> newBlockIds = new List <string>(); // A list of block ids added by this call.
var childCount = xml.ChildNodes.Count;
int width = 0; // Not used in LTR.
var variablesFirst = true;
for (var i = 0; i < childCount; i++)
{
var xmlChild = xml.ChildNodes[i];
var name = xmlChild.Name.ToLower();
if (string.Equals(name, "block") ||
string.Equals(name, "shadow"))
{
// Allow top-level shadow blocks if recordUndo is disabled since
// that meas an undo is in progress. Such a block is expected
// to be moved to a nested destination in the next operation.
var block = Xml.DomToBlock(xmlChild, workspace);
newBlockIds.Add(block.ID);
int blockX = 10;
int blockY = 10;
bool blockXParseSucceed = int.TryParse(xmlChild.GetAttribute("x"), out blockX);
bool blockYParseSucceed = int.TryParse(xmlChild.GetAttribute("y"), out blockY);
if (blockXParseSucceed && blockYParseSucceed)
{
block.XY = new Vector2(workspace.RTL ? width - blockX : blockX, blockY);
}
variablesFirst = false;
}
else if (string.Equals(name, "shadow"))
{
variablesFirst = false;
}
else if (string.Equals(name, "variables"))
{
if (variablesFirst)
{
Xml.DomToVariables(xmlChild, workspace);
}
else
{
throw new Exception("\'variables\' tag must exist once before block and " +
"shadow tag elements in the workspace XML, but it was found in " +
"another location.");
}
variablesFirst = false;
}
}
workspace.UpdateVariableStore(false);
return(newBlockIds);
}
/// <summary>
/// Respawn the shadow block if there was one connected to this connection.
/// </summary>
public void RespawnShadow()
{
var parentBlock = this.SourceBlock;
var shadow = this.ShadowDom;
if (parentBlock.Workspace != null && shadow != null /*&& Events.recordUndo*/)
{
var blockShadow = Xml.DomToBlock(shadow, parentBlock.Workspace);
if (blockShadow.OutputConnection != null)
{
this.Connect(blockShadow.OutputConnection);
}
else if (blockShadow.PreviousConnection != null)
{
this.Connect(blockShadow.PreviousConnection);
}
else
{
throw new Exception("Child block does not have output or previous statement.");
}
}
}