// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceGridGUI;

import java.util.Enumeration;

import java.awt.Component;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.JPopupMenu;

//
// This class behaves like a leaf; derived class that represent non-leaf nodes must 
// override various methods.
//
public class TreeNodeBase implements javax.swing.tree.TreeNode, TreeCellRenderer 
{
    public Coordinator getCoordinator()
    {
        return _parent.getCoordinator();
    }

    public Enumeration children()
    {
        return new Enumeration()
            {
                public boolean hasMoreElements()
                {
                    return false;
                }

                public Object nextElement()
                {
                    throw new java.util.NoSuchElementException();
                }
            };
    }
    
    public boolean getAllowsChildren()
    {
        return false;
    }
    
    public javax.swing.tree.TreeNode getChildAt(int childIndex)
    {
        return null;
    }
   
    public int getChildCount()
    {
        return 0;
    }

    public int getIndex(javax.swing.tree.TreeNode node)
    {
        return -1;
    }
        
    public javax.swing.tree.TreeNode getParent()
    {
        return _parent;
    }

    public boolean isLeaf()
    {
        return true;
    }

    public Component getTreeCellRendererComponent(
        JTree tree,
        Object value,
        boolean sel,
        boolean expanded,
        boolean leaf,
        int row,
        boolean hasFocus) 
    {
        return null;
    }

    public String toString()
    {
        return _id;
    }

    public JPopupMenu getPopupMenu()
    {
        return null;
    }

    public String getId()
    {
        return _id;
    }
    
    public TreePath getPath()
    {
        if(_parent == null)
        {
            return new TreePath(this);
        }
        else
        {
            return _parent.getPath().pathByAddingChild(this);
        }
    }

    public java.util.LinkedList getFullId()
    {
        java.util.LinkedList result = _parent == null ?
            new java.util.LinkedList() :
            _parent.getFullId();

        result.add(_id);
        return result;
    }

    public TreeNodeBase findChild(String id)
    {
        Enumeration p = children();
        while(p.hasMoreElements())
        {
            TreeNodeBase child = (TreeNodeBase)p.nextElement();
            if(child.getId().equals(id))
            {
                return child;
            }
        }
        return null;
    }

    protected String makeNewChildId(String base)
    {
        String id = base;
        int i = 0;
        while(findChild(id) != null)
        {
            id = base + "-" + (++i);
        }
        return id;
    }

    protected TreeNodeBase(TreeNodeBase parent, String id)
    {
        _parent = parent;
        _id = id;
    }

    //
    // Helper functions
    //
    protected boolean insertSortedChild(TreeNodeBase newChild, java.util.List children,
                                        DefaultTreeModel treeModel)
    {
        String id = newChild.getId();
        int i;
        for(i = 0; i < children.size(); ++i)
        {
            String otherId = ((TreeNodeBase)children.get(i)).getId();
            int cmp = id.compareTo(otherId);

            if(cmp == 0)
            {
                return false;
            }
            else if(cmp < 0)
            {
                break;
            }
        }
        children.add(i, newChild);

        if(treeModel != null)
        {
            treeModel.nodesWereInserted(this, new int[]{getIndex(newChild)});
        }
        return true;
    }

    protected String insertSortedChildren(java.util.List newChildren, 
                                          java.util.List intoChildren,
                                          DefaultTreeModel treeModel)
    {
        TreeNodeBase[] children = (TreeNodeBase[])newChildren.toArray(new TreeNodeBase[0]);    
        java.util.Arrays.sort(children, _childComparator);
            
        int[] indices = new int[children.length];

        int offset = -1;

        int i = 0;
        boolean checkInsert = true;
        for(int j = 0; j < children.length; ++j)
        {
            String id = children[j].getId();
            
            if(checkInsert)
            {
                while(i < intoChildren.size()) 
                {
                    TreeNodeBase existingChild = (TreeNodeBase)intoChildren.get(i);
                    int cmp = id.compareTo(existingChild.getId());
                    if(cmp == 0)
                    {
                        return id;
                    }
                    if(cmp < 0)
                    {
                        break; // while
                    }
                    i++;
                }
                
                if(i < intoChildren.size())
                {    
                    // Insert here, and increment i (since children is sorted)
                    intoChildren.add(i, children[j]);
                    if(offset == -1)
                    {
                        offset = getIndex((TreeNodeBase)intoChildren.get(0));
                    }

                    indices[j] = offset + i;
                    i++;                    continue; // for
                }
                else
                {
                    checkInsert = false;
                }
            }
            
            //
            // Append
            //
            intoChildren.add(children[j]);
            if(offset == -1)
            {
                offset = getIndex((TreeNodeBase)intoChildren.get(0));
            }
            indices[j] = offset + i;
            i++;
        }
        
        if(treeModel != null)
        {
            treeModel.nodesWereInserted(this, indices);
        }
        
        return null;
    }

    protected void removeSortedChildren(String[] childIds, 
                                        java.util.List fromChildren, 
                                        DefaultTreeModel treeModel)
    {
        if(childIds.length == 0)
        {
            return; // nothing to do
        }
        assert fromChildren.size() > 0;

        String[] ids = (String[])childIds.clone();
        java.util.Arrays.sort(ids);
        
        Object[] childrenToRemove = new Object[ids.length];
        int[] indices = new int[ids.length];
            
        int i = getIndex((TreeNodeBase)fromChildren.get(0));
        int j = 0;
        java.util.Iterator p = fromChildren.iterator();

        while(p.hasNext() && j < ids.length)
        {
            TreeNodeBase child = (TreeNodeBase)p.next();            
            if(ids[j].equals(child.getId()))
            {
                childrenToRemove[j] = child;
                indices[j] = i;
                p.remove();
                ++j;
            }
            ++i;
        }
            
        //
        // Should be all removed
        //
        assert(j == ids.length);

        if(treeModel != null)
        {
            treeModel.nodesWereRemoved(this, indices, childrenToRemove);
        }
    }

    protected void childrenChanged(java.util.List children, DefaultTreeModel treeModel)
    {
        java.util.Iterator p = children.iterator();
        while(p.hasNext())
        {
            TreeNodeBase child = (TreeNodeBase)p.next();
            treeModel.nodeStructureChanged(child);
        }
    }
    
    public int[] resize(int[] array, int size)
    {
        int[] result = new int[size];
        System.arraycopy(array, 0, result, 0, size);
        return result;
    }

    protected TreeNodeBase find(String id, java.util.List inList)
    {
        java.util.Iterator p = inList.iterator();
        while(p.hasNext())
        {
            TreeNodeBase node = (TreeNodeBase)p.next();
            if(node.getId().equals(id))
            {
                return node;
            }
        }
        return null;
    }

    protected TreeNodeBase _parent;
    protected String _id;

    protected java.util.Comparator _childComparator = new java.util.Comparator()
        {
            public int compare(Object o1, Object o2)
            {
                TreeNodeBase child1 = (TreeNodeBase)o1;
                TreeNodeBase child2 = (TreeNodeBase)o2;
                return child1.getId().compareTo(child2.getId());
            }
        };
}