importimagemap.java

动画素材图像语义标注系统：该系统实现对图片的语义标注

/*
 *  ImportImageMap.java
 *  Heiko Schr鰀er
 *  wikiimagemapper.sourceforge.net
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package cn.dxm.client;

import java.awt.datatransfer.*;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import java.awt.Toolkit;

/**
 * This class is used for import imagemap code, hold in clipboard, and create the defined shapes
 *
 * @author Heiko Schroeder <[e-mail]>
 */
public class ImportImageMap {

	/**
	*	Reads the actual clipboard content
	*
	*	@return String with clipboard text
	*/
	private static String getClipboardContent()
	{
		SecurityManager sm = System.getSecurityManager();
		if (sm != null) {
        try {
           sm.checkSystemClipboardAccess();
           }
        catch (Exception e) {e.printStackTrace();}
        }
		Toolkit tk = Toolkit.getDefaultToolkit();
		Clipboard systemClipboard = tk.getSystemClipboard();
		
		Transferable transferData = systemClipboard.getContents(null);
		
		try {
			Object content = transferData.getTransferData( DataFlavor.stringFlavor );
			return (String)content;
		}catch ( UnsupportedFlavorException e ) {}
		 catch ( IOException e ) {}
		 
		return null;
	}
	
	/**
	 * processImageMapSyntax reads the actual clipboard content and parses it to
	 * import, previously exported imagemap code
	 *
	 * @return A list of shapes, defined in the clipboard-text
	 */
	public static List<Shape> processImageMapSyntax() {
	
		List<Shape> shapes = new ArrayList<Shape>();
		
		String clipboardContent = (String)getClipboardContent();
		String[] clipboardRows = clipboardContent.split("\n");
		
		
		for (int i=0; i<clipboardRows.length;i++)
		{
			System.out.println(i+": "+clipboardRows[i]);
			Shape parsedShape = parseLine(clipboardRows[i]);
			if (parsedShape != null)
				shapes.add(parsedShape);
		}
		System.out.println("Number of parsed shapes: "+shapes.size());
		
		return shapes;
	}
	
	/**
	 * parseLine, parses a line from the imagemap code and creates the descibed
	 * shape.
	 *
	 * @param a line of imagemap code (String)
	 * @param the shape, defined in that line of code
	 */
	public static Shape parseLine(String line) 
	{
		String 		url = "";
		String		shape = "";
		String		alt = "";
		String[]	coords = null;
		
		Shape			shapeInstance = null;
		AttributeBean 	shapeAttribute = new AttributeBean();

		String[] lineSplitted = line.split(";");		// Split line into single attributes, seperated by ";"
		
		// Parse line
		if (lineSplitted.length > 1) {					// line is not start,end or imagename 
			url = lineSplitted[0];
			for (int i=1; i<lineSplitted.length; i++)
			{
				String[] token = lineSplitted[i].split("\"");
				if (token.length > 1)
				{
					if(token[0].compareTo("shape=")==0)
						shape = token[1];
					else if (token[0].compareTo("alt=")==0)
						alt = token[1];
					else if (token[0].compareTo("coords=")==0)
						coords = token[1].split(",");
					else
						System.out.println("Can not handle this: "+token[0]);
				}
			}

			// Build the Shape object
			if (coords != null){
				if(shape.compareTo("rect")==0)
					shapeInstance = new Rectangle( String2Int(coords) );
			}
			
			// Set attributes URL and ALT to Shape object
			shapeAttribute.setHref(url);
			shapeAttribute.setAlt(alt);
			
			if (shapeInstance != null)
				shapeInstance.setAttribute(shapeAttribute);
			
			return shapeInstance;
		}
		return null;
	}
	
	/**
	 * String2Int converts a String-array into an array, with the same content, as integer.
	 * Need this function, to convert the read coordinates (after reading and splitting, they are
	 * saved into a string-array) to integers.
	 *
	 * @param a string array
	 * @return a integer array (all string represented integers become converted)
	 */
	private static int[] String2Int(String[] sArray)
	{
		int length = sArray.length;
		int[] iArray = new int[length];
		
		for (int i=0; i<sArray.length; i++)
		{
			iArray[i]=Integer.valueOf( sArray[i] ).intValue();
		}
		return iArray;
	}

	
}