source: trunk/src/org/expeditee/gio/ClipboardManager.java@ 1436

package org.expeditee.gio;

import java.io.File;
import java.util.List;

import org.expeditee.core.Image;

/**
 * In charge of getting/setting the OS clipboard. Any Object can be
 * set on the clipboard, but typically only other instances of Expeditee
 * will be able to read this. Similarly generic data will only be available
 * to get if it has been set by another Expeditee instance. Additionally,
 * the clipboard data can have an image- or string-representation, which
 * external applications that can copy/paste image/string data will be able
 * to set/get.
 * 
 * @author cts16
 */
public abstract class ClipboardManager {

        /**
         * Sets the clipboard to the given data. If data is null, should leave
         * the clipboard unchanged (however, if data is not null but all of its
         * fields are null, this will clear the clipboard).
         */
        public abstract void set(ClipboardData data);
        
        /** Gets the data that is currently on the clipboard. */
        public abstract ClipboardData get();
        
        /** Representation of the data on the clipboard. */
        public static class ClipboardData {
                
                /** Any generic data on the clipboard (for Expeditee use only). */
                public Object data;
                /**
                 * An image representation of the clipboard data
                 * (for use when copy/pasting to/from image applications).
                 */
                public Image imageRepresentation;
                /**
                 * A string representation of the clipboard data
                 * (for use when copy/pasting to/from text applications).
                 */
                public String stringRepresentation;
                /**
                 * A List representation of the clipboard data
                 * (for use when copy/pasting to/from directories),
                 */
                public List<File> fileRepresentation;
                
                /** Default constructor. */
                public ClipboardData()
                {
                        this(null, null, null);
                }
                
                /** Standard constructor. */
                public ClipboardData(Object data, Image imageRepresentation, String stringRepresentation)
                {
                        this.data = data;
                        this.imageRepresentation = imageRepresentation;
                        this.stringRepresentation = stringRepresentation;
                }
                
                /** Instantiator for purely-image data. */
                public static ClipboardData fromImage(Image image)
                {
                        return new ClipboardData(null, image, null);
                }
                
                /** Instantiator for purely-string data. */
                public static ClipboardData fromString(String string)
                {
                        return new ClipboardData(null, null, string);
                }
                
        }
        
}