package com.fiorano.openide.windows;

import org.openide.explorer.ExplorerManager;
import org.openide.explorer.ExplorerUtils;
import org.openide.nodes.Node;
import org.openide.util.HelpCtx;
import org.openide.util.Lookup;
import org.openide.windows.TopComponent;

import javax.swing.*;
import javax.swing.text.DefaultEditorKit;
import java.awt.*;

public class XExplorerPanel extends TopComponent implements ExplorerManager.Provider, Lookup.Provider {
    private ExplorerManager manager;

    public XExplorerPanel() {
        initExplorerManager();

        setLayout(new BorderLayout());
    }

    protected void initExplorerManager(){
        manager = new ExplorerManager();
        ActionMap map = getActionMap ();
        map.put(DefaultEditorKit.copyAction, ExplorerUtils.actionCopy(manager));
        map.put(DefaultEditorKit.cutAction, ExplorerUtils.actionCut(manager));
        map.put(DefaultEditorKit.pasteAction, ExplorerUtils.actionPaste(manager));
        map.put("delete", ExplorerUtils.actionDelete(manager, true)); //NOI18N
        map.put("forceDelete", ExplorerUtils.actionDelete(manager, false)); //NOI18N
        getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).
                put(KeyStroke.getKeyStroke("shift DELETE"), "forceDelete");   //NOI18N

        //following line tells the top component which lookup should be associated with it
        associateLookup(ExplorerUtils.createLookup(manager, map));
    }

    public ExplorerManager getExplorerManager() {
        return manager;
    }

    // It is good idea to switch all listeners on and off when the
    // component is shown or hidden. In the case of TopComponent use:
    protected void componentActivated() {
        ExplorerUtils.activateActions(manager, true);
    }
    protected void componentDeactivated() {
        ExplorerUtils.activateActions(manager, false);
    }

    /*-------------------------------------------------[ HelpCtx ]---------------------------------------------------*/

    /** Get context help for an explorer window.
    * Looks at the manager's node selection.
    * @return the help context
    * @see #getHelpCtx(Node[],HelpCtx)
    */
    public HelpCtx getHelpCtx () {
        return getHelpCtx (getExplorerManager ().getSelectedNodes (), super.getHelpCtx());
    }

    public int getPersistenceType(){
        return PERSISTENCE_NEVER;
    }

    /** Utility method to get context help from a node selection.
    * Tries to find context helps for selected nodes.
    * If there are some, and they all agree, uses that.
    * In all other cases, uses the supplied generic help.
    * @param sel a list of nodes to search for help in
    * @param def the default help to use if they have none or do not agree
    * @return a help context
    */
    public static HelpCtx getHelpCtx (Node[] sel, HelpCtx def) {
        HelpCtx result = null;
        for (int i = 0; i < sel.length; i++) {
            HelpCtx attempt = sel[i].getHelpCtx ();
            if (attempt != null && ! attempt.equals (HelpCtx.DEFAULT_HELP)) {
                if (result == null || result.equals (attempt)) {
                    result = attempt;
                } else {
                    // More than one found, and they conflict. Get general help on the Explorer instead.
                    result = null;
                    break;
                }
            }
        }
        if (result != null)
            return result;
        else
            return def;
    }
}