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-              r1390
+              r1391
+/* Copyright (C) 2000, 2001, 2002  Free Software Foundation
+/* ComponentOrientation.java -- describes a component's orientation
+   Copyright (C) 2000, 2001, 2002 Free Software Foundation
 This file is part of GNU Classpath.
 …
 exception statement from your version. */
 /**
+ * @author Bryce McKinlay  <[email protected]>
+ * This class is used to differentiate different orientations for text layout.
+ * It controls whether text flows left-to-right or right-to-left, and whether
+ * lines are horizontal or vertical, as in this table:<br>
+ * <pre>
+ * LT      RT      TL      TR
+ * A B C   C B A   A D G   G D A
+ * D E F   F E D   B E H   H E B
+ * G H I   I H G   C F I   I F C
+ * </pre>
+ * <b>LT</b> languages are most common (left-to-right lines, top-to-bottom).
+ * This includes Western European languages, and optionally includes Japanese,
+ * Chinese, and Korean. <b>RT</b> languages (right-to-left lines,
+ * top-to-bottom) are mainly middle eastern, such as Hebrew and Arabic.
+ * <b>TR</b> languages flow top-to-bottom in a line, right-to-left, and are
+ * the basis of Japanese, Chinese, and Korean. Finally, <b>TL</b> languages
+ * flow top-to-bottom in a line, left-to-right, as in Mongolian.
+ *
+ * <p>This is a pretty poor excuse for a type-safe enum, since it is not
+ * guaranteed that orientation objects are unique (thanks to serialization),
+ * yet there is no equals() method. You would be wise to compare the output
+ * of isHorizontal() and isLeftToRight() rather than comparing objects with
+ * ==, especially since more constants may be added in the future.
+ *
+ * @author Bryce McKinlay <[email protected]>
+ * @since 1.0
+ * @status updated to 1.4
  */
+/* 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
+public final class ComponentOrientation implements Serializable
+{
+  // Here is a wild guess.
+  private static int HORIZONTAL_ID    = 1 << 0,
+                     LEFT_TO_RIGHT_ID = 1 << 1;
+  /**
+   * Compatible with JDK 1.0+.
+   */
+  private static final long serialVersionUID = -4113291392143563828L;
+  /** Constant for unknown orientation. */
+  private static final int UNKNOWN_ID = 1;
+  /** Constant for horizontal line orientation. */
+  private static final int HORIZONTAL_ID = 2;
+  /** Constant for left-to-right orientation. */
+  private static final int LEFT_TO_RIGHT_ID = 4;
+  /**
+   * Items run left to right, and lines flow top to bottom. Examples: English,
+   * French.
+   */
   public static final ComponentOrientation LEFT_TO_RIGHT
+    = new ComponentOrientation(HORIZONTAL_ID & LEFT_TO_RIGHT_ID);
+    = new ComponentOrientation(HORIZONTAL_ID | LEFT_TO_RIGHT_ID);
+  /**
+   * Items run right to left, and lines flow top to bottom. Examples: Arabic,
+   * Hebrew.
+   */
   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)
+    = new ComponentOrientation(UNKNOWN_ID | HORIZONTAL_ID | LEFT_TO_RIGHT_ID);
+  /**
+   * The orientation of this object; bitwise-or of unknown (1), horizontal (2),
+   * and left-to-right (4).
+   *
+   * @serial the orientation
+   */
+  private final int orientation;
+  /**
+   * Construct a given orientation.
+   *
+   * @param orientation the orientation
+   */
+  private ComponentOrientation(int orientation)
+  {
     this.orientation = orientation;
+  }
   public boolean isHorizontal()
+  {
+    return ((orientation & HORIZONTAL_ID) != 0);
+  }
+    return (orientation & HORIZONTAL_ID) != 0;
+  }
+  /**
+   * If isHorizontal() returns true, then this determines whether items in
+   * the line flow left-to-right. If isHorizontal() returns false, items in
+   * a line flow top-to-bottom, and this determines if lines flow
+   * left-to-right.
+   *
+   * @return true if this orientation flows left-to-right
+   */
   public boolean isLeftToRight()
+  {
+    return ((orientation & LEFT_TO_RIGHT_ID) != 0);
+  }
+    return (orientation & LEFT_TO_RIGHT_ID) != 0;
+  }
+  /**
+   * Gets an orientation appropriate for the locale.
+   *
+   * @param locale the locale
+   * @return the orientation for that locale
+   * @throws NullPointerException if locale is null
+   */
   public static ComponentOrientation getOrientation(Locale locale)
+  {
+    // FIXME: Use a table to look this up.
+    // Based on iterating over all languages defined in JDK 1.4, this behavior
+    // matches Sun's. However, it makes me wonder if any non-horizontal
+    // orientations even exist, as it sure contradicts their documentation.
+    String language = locale.getLanguage();
+    if ("ar".equals(language) || "fa".equals(language) || "iw".equals(language)
+        || "ur".equals(language))
+      return RIGHT_TO_LEFT;
     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
+    }
+    {
+       bdl.getObject("Orientation");
+      }
+      }
     try
+    {
+      Locale l = bdl.getLocale();
+      r = getOrientation(l);
+      if (r != null)
+        return r;
+    }
+    catch (Exception x)
+    {
+      // Fall through
+    }
+    return (getOrientation (Locale.getDefault ()));
+  }
+}
+      {
+        r = getOrientation(bdl.getLocale());
+        if (r != null)
+          return r;
+      }
+    catch (Exception ignored)
+      {
+      }
+    return getOrientation(Locale.getDefault());
+  }
+} // class ComponentOrientation

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