libjava/java/awt/ComponentOrientation.java

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/**
 * @author Bryce McKinlay  <bryce@albatross.co.nz>
 */

/* Status: Incomplete. Needs a Locale lookup table. */

package java.awt;

import java.util.Locale;
import java.util.ResourceBundle;

public final class ComponentOrientation implements java.io.Serializable
{
  // Here is a wild guess.
  private static int HORIZONTAL_ID    = 1 << 0,
                     LEFT_TO_RIGHT_ID = 1 << 1;

  public static final ComponentOrientation LEFT_TO_RIGHT
    = new ComponentOrientation(HORIZONTAL_ID & LEFT_TO_RIGHT_ID);
  public static final ComponentOrientation RIGHT_TO_LEFT
    = new ComponentOrientation(HORIZONTAL_ID);
  public static final ComponentOrientation UNKNOWN
    = new ComponentOrientation(0);

  // FIXME: This field is from the serialization spec, but what are the 
  // correct values?
  int orientation;

  ComponentOrientation(int orientation)
  {
    this.orientation = orientation;
  }

  public boolean isHorizontal()
  {
    return ((orientation & HORIZONTAL_ID) != 0);
  }

  public boolean isLeftToRight()
  {
    return ((orientation & LEFT_TO_RIGHT_ID) != 0);
  }

  public static ComponentOrientation getOrientation(Locale locale)
  {
    // FIXME: Use a table to look this up.
    return LEFT_TO_RIGHT;
  }

  public static ComponentOrientation getOrientation(ResourceBundle bdl)
  {
    ComponentOrientation r;

    try
    {
      Object obj = bdl.getObject("Orientation");
      r = (ComponentOrientation) obj;
      if (r != null)
	return r;  
    }
    catch (Exception x)
    {
      // Fall through
    }

    try
    {
      Locale l = bdl.getLocale();
      r = getOrientation(l);
      if (r != null)
	return r;
    }
    catch (Exception x)
    {
      // Fall through  
    }

    return (getOrientation (Locale.getDefault ()));
  }
}