public SnippetInstance(Snippet snippet, SnippetInstance parent)
{
Debug.Assert(!snippet.IsTopLevel);
this.Snippet = snippet;
this.Snippet.UI.SnippetInstances.Add(this);
this.parent = parent;
this.node = new SnippetTNode(snippet.Title, this);
}
/// <summary>
///
/// </summary>
/// <param name="eventOnLinkSelection"></param>
/// <param name="eventAfterLinkSelection">can be null</param>
public void SelectSnippetLinkStart(SomeSnippetEventHandler eventOnLinkSelection,
Control controlReceivesFocus)
{
// what to do when it's selected
OnLinkSelection = eventOnLinkSelection;
this.controlReceivesFocus = controlReceivesFocus;
selectionBeforeSnipetLinkSelection = SingleSelectedNode as SnippetTNode;
SelectingSnippetLink = true;
selectSnippetForm.Visible = true;
SuppressNoneSelect = true;
suppressShiftAndControlSelections = true;
}
public void PasteFromLocalClipboard(SnippetTNode to)
{
// note that the PoppedUpNode does not have to be a value. It might be a "root"
// node
if (localClipboard == null || localClipboard.Contains(to))
return;
// on move, clear the clipboard
if (localClipboard.IsMove)
{
MoveNodes(localClipboard, to);
Clipboard.SetDataObject(new SerializableUniverse()); // clear the clipboard, can't use null
localClipboard = null;
}
else
CopyNodes(localClipboard, to);
}
/// <summary>
/// </summary>
/// <param name="who">This is the node that we're copying, the original.</param>
/// <param name="to">The new parent.</param>
/// <param name="changeSelection"></param>
public TreeNode MoveNode(SnippetTNode who, SnippetTNode to, bool changeSelection)
{
Snippet destination = null;
if (to == null)
destination = Universe.Instance.ModelGateway.TopLevelSnippet;
else
destination = to.Snippet;
try
{
// yes, this is tricky, but what are the alternatives? We have to pass information
// on our position in the tree
Snippet from = who.SnippetInstance.parent.Snippet;
who.Snippet.MoveSnippet(from, destination);
SnippetInstance reselect = null;
if (to == null)
{
reselect = who.Snippet.UI.GetInstanceUnderTopLevel();
}
else
{
reselect = who.Snippet.UI.GetInstanceUnder(to.SnippetInstance);
}
TreeNode node = reselect.node;
// select the new node in its location
if (changeSelection)
ReplaceSelectionWith(node);
return node;
}
catch (NewChildIsAncestorException)
{
string msg;
if (to == null)
{
msg = String.Format("Illegal move (top level {0} already exists)", who.Text);
}
else
{
msg = String.Format("Illegal move ({0} is an ancestor of {1} or {1} already has a {0})", who.Text, to.Text);
}
MessageBox.Show(msg, MainForm.DialogCaption, MessageBoxButtons.OK);
}
return null;
}
public void DeleteNode(SnippetTNode node, bool changeSelection)
{
if (node.Snippet.WillDeleteRemoveSnippet())
{
DialogResult okay = MessageBox.Show(
"Deleting will permanently remove one or more Snippets (including \"" +
node.Text + "\"). Delete anyway?", MainForm.DialogCaption, MessageBoxButtons.YesNo);
if (okay == DialogResult.Yes)
Delete(node, changeSelection);
}
else
Delete(node, changeSelection);
}
public void Delete(SnippetTNode node, bool changeSelection)
{
SnippetTNode nextNode = null;
// this stuff to find the next node is a little sloppy because it might get wiped out
// in the node.Remove() if it's a twin or even a child of a twin (of course).
// Problems of multiple hierarchies :)
if (changeSelection)
{
nextNode = (SnippetTNode)node.NextVisibleNode;
if (nextNode == null)
nextNode = (SnippetTNode)node.PrevVisibleNode;
}
node.Snippet.DeleteSnippet(node.SnippetInstance.parent.Snippet);
if (changeSelection)
{
if (nextNode != null && !nextNode.Dead)
ReplaceSelectionWith(nextNode);
else if (Nodes.Count > 0)
ReplaceSelectionWith(Nodes[0]);
}
}
/// <summary>
/// </summary>
/// <param name="who">This is the node that we're copying, the original.</param>
/// <param name="to">The new parent.</param>
/// <param name="changeSelection"></param>
/// <returns></returns>
public SnippetTNode CopyNode(SnippetTNode who, SnippetTNode to, bool changeSelection)
{
Snippet destination = null;
if (to == null)
destination = Universe.Instance.ModelGateway.TopLevelSnippet;
else
destination = to.Snippet;
try
{
who.Snippet.CopySnippet(destination);
SnippetInstance reselect = null;
if (to == null)
{
reselect = who.Snippet.UI.GetInstanceUnderTopLevel();
}
else
{
reselect = who.Snippet.UI.GetInstanceUnder(to.SnippetInstance);
}
TreeNode node = reselect.node;
// select the new node in its location
if (changeSelection)
ReplaceSelectionWith(node);
return reselect.node;
}
catch (NewChildIsAncestorException)
{
string msg;
if (to == null)
{
msg = String.Format("Illegal copy (top level {0} already exists)", who.Text);
}
else
{
msg = String.Format("Illegal copy ({0} is an ancestor of {1} or {1} already has a {0})", who.Text, to.Text);
}
MessageBox.Show(msg, MainForm.DialogCaption, MessageBoxButtons.OK);
}
return null;
}
/// <summary>
/// Paste text as nodes! Massive snippet insertion, also
/// </summary>
/// <param name="wholeText"></param>
/// <param name="to"></param>
void Paste(string wholeText, SnippetTNode to)
{
char[] split = { (char)13, (char)10 };
string[] snippetTexts = wholeText.Split(split);
foreach (string text in snippetTexts)
{
if (text.Length > 0)
{
Snippet snippet = null;
if (to != null)
snippet = to.Snippet.AddChildSnippet();
else
snippet = Universe.Instance.ModelGateway.TopLevelSnippet.AddChildSnippet();
snippet.Title = text;
}
}
}
private void MoveNodes(ICollection nodes, SnippetTNode to)
{
if (nodes == null)
return;
RemoveAllCachedNodes();
ArrayList newSelection = new ArrayList(nodes.Count);
foreach (SnippetTNode node in nodes)
{
TreeNode selectMe = MoveNode(node, to, false);
newSelection.Add(selectMe);
}
ReplaceSelectionWith(newSelection);
}
private void CopyNodes(ICollection nodes, SnippetTNode to)
{
if (nodes == null)
return;
ArrayList newSelection = new ArrayList(nodes.Count);
foreach (SnippetTNode node in nodes)
{
TreeNode newNode = CopyNode(node, to, false);
if (newNode != null)
newSelection.Add(newNode);
}
// replace the selection
ReplaceSelectionWith(newSelection);
}
void BeginNameEdit(SnippetTNode node)
{
if (node == null)
return;
if (LabelEdit)
{
node.BeginEdit();
}
else // if client server, really
{
Universe.Instance.propertiesPane.BeginEdit();// Focus();
}
}
