// This is the main class of Image2HTML.  It handle the command line.
public class Image2HTML {
  
  static Preferences prefs;

  public static void main(String args[]) {
    
    // Parse the command line
    prefs = new Preferences();
    for (int i = 0; i < args.length; i++) {
      
      if (args[i].equals("-url")) {
	prefs.urlString = args[i+1];
	i++;
      }
      
      else if (args[i].equals("-tofile")) {
	prefs.toFile = args[i+1];
	i++;
      }
      
      else if (args[i].equals("-xscale")) {
	prefs.xscale = Integer.parseInt(args[i+1]);
	i++;
      }

      else if (args[i].equals("-yscale")) {
	prefs.yscale = Integer.parseInt(args[i+1]);
	i++;
      }

      else if (args[i].equals("-border")) {
	prefs.border = Integer.parseInt(args[i+1]);
	i++;
      }

      else if (args[i].equals("-cellspacing")) {
	prefs.cellspacing = Integer.parseInt(args[i+1]);
	i++;
      }

      else if (args[i].equals("-nospacers")) {
	prefs.spacers = false;
      }

      else if (args[i].equals("-tableonly")) {
	prefs.fullpage = false;
      }

      else if (args[i].equals("-compress")) {
	prefs.compress = true;
      }

      else if (args[i].equals("-cgi")) {
	prefs.cgi = true;
      }

      else {

	System.out.println("usage: java Image2HTML  -url {URL}");
	System.out.println("                       [-tofile {pathname}]");
	System.out.println("                       [-xscale {integer}]");
	System.out.println("                       [-yscale {integer}]");
	System.out.println("                       [-compress]");
	System.out.println("                       [-border {integer}]");
	System.out.println("                       [-cellspacing {integer}]");
	System.out.println("                       [-nospacers]");
	System.out.println("                       [-tableonly]");
	System.out.println("                       [-cgi]");
	System.out.println("invalid arg: " + args[i]);
	System.exit(0);

      }  // usage error

    }  // for args

    if (prefs.urlString == null) {
      System.out.println("You must specify an url; use -usage to see usage");
      System.exit(-1);
    }
	
    // Get and process the image
    ImageFetcher imageFetched = new ImageFetcher(prefs);

  }  // main()
	
  static public void ErrorExit(String errorMsg) {

    // In CGI mode, we send everything to stdout
    if (prefs.cgi) 
      System.out.println("Error: " + errorMsg);

    else
      System.err.println("Error: " + errorMsg);

    System.exit(-1);
	
  }  //==== ErrorExit() ====//
	
}  // class Image2HTML