// Copyright (c) 2002  Per M.A. Bothner.// This is free software;  for terms and warranty disclaimer see ./COPYING.package gnu.jemacs.buffer;import gnu.lists.LList;import gnu.mapping.WrappedException;import java.awt.Color;public abstract class EToolkit{  public static final String swingToolkit = "gnu.jemacs.swing.SwingToolkit";  public static final String swtToolkit = "gnu.jemacs.swt.SwtToolkit";  public static String defaultToolkit = swingToolkit;  static EToolkit instance;  static Class toolkitClass;  public static EToolkit getInstance ()  {    EToolkit inst = instance;    if (inst != null)      return inst;    String name = System.getProperty("gnu.jemacs.toolkit");    if (name == null)      name = defaultToolkit;    else if (name.equals("swing"))      name = swingToolkit;    else if (name.equals("swt"))      name = swtToolkit;    return getInstance(name);  }  public static synchronized EToolkit getInstance (String toolkitClassname)  {    if (instance == null)      {	try	  {	    if (toolkitClass == null)	      toolkitClass = Class.forName(toolkitClassname);	    instance = (EToolkit) toolkitClass.newInstance();	  }	catch (Exception ex)	  {	    throw new WrappedException(ex);	  }      }    return instance;  }  public abstract Buffer newBuffer (String name);  public abstract EFrame newFrame(Buffer buffer);    public abstract EMenu getMenu(LList menubar);  /** Get a face with the given name. */  public abstract Object getFace(String name, boolean create);  public void setUnderline (Object face, boolean underline)  {    // Default is to ignore.  }  public void setBold (Object face, boolean bold)  {    // Default is to ignore.  }  public void setForeground (Object face, Color foreground)  {    // Default is to ignore.  }  public void setBackground (Object face, Color background)  {    // Default is to ignore.  }  public abstract Object getIgnoreAction();}