source: trunk/src/org/expeditee/agents/DisplayComet.java@ 121

package org.expeditee.agents;

import java.util.Collection;
import java.util.HashSet;
import java.util.Stack;

import org.expeditee.gui.DisplayIO;
import org.expeditee.gui.Frame;
import org.expeditee.gui.FrameIO;
import org.expeditee.gui.MessageBay;
import org.expeditee.items.Item;
import org.expeditee.items.ItemUtils;

public class DisplayComet extends DefaultAgent {
        private Stack<Frame> _frameList = new Stack<Frame>();

        public DisplayComet(String delay) {
                super(delay);
        }

        public DisplayComet() {
                super();
        }
        
        @Override
        protected Frame process(Frame frame) {
                Collection<String> seen = new HashSet<String>();
                
                DisplayIO.addToBack(frame);
                
                // Goto the end of the comet
                Item old = null;
                Frame oldFrame = frame;
                while (oldFrame != null) {
                        if(_stop)
                                return null;
                        seen.add(oldFrame.getName().toLowerCase());
                        _frameList.push(oldFrame);
                        old = ItemUtils.FindExactTag(oldFrame.getItems(), ItemUtils
                                        .GetTag(ItemUtils.TAG_BACKUP));
                        oldFrame = null;
                        if (old != null) {
                                String link = old.getAbsoluteLink();
                                String linkLowerCase = link.toLowerCase();
                                if (link != null && !seen.contains(linkLowerCase)) {
                                        oldFrame = FrameIO.LoadFrame(linkLowerCase);
                                        MessageBay.overwriteMessage("Loading frames: " + link);
                                }
                        }
                }
                // Back out one frame at a time
                while (!_frameList.empty()) {
                        if(_stop)
                                return null;
                        DisplayIO.setCurrentFrame(_frameList.pop());
                        _frameCount++;
                        pause(_delay);
                }

                return _start;
        }

}